Tootfinder

Relativistic quantum entanglement in a bipartite charged scalar system
T. Nadareishvili, S. Stagraczy\'nski, L. Chotorlishvili
https://arxiv.org/abs/2507.17502 https://

Relativistic quantum entanglement in a bipartite charged scalar system
Continuous variable entanglement in a system of two interacting charged scalar mesons is studied. The mesons mutual interaction is mediated by a central symmetric Coulomb potential. We work out the difference between relativistic and non-relativistic limits on the basis of the continuous variable separability criteria and prove rigorously the following theorem for our system: While a bipartite charged scalar mesonic quantum system with centrally symmetric interaction is entangled in the relat…

Evaluating judgment of spatial correlation in visual displays of scalar field distributions
Yayan Zhao, Matthew Berger
https://arxiv.org/abs/2507.17997 https://

Evaluating judgment of spatial correlation in visual displays of scalar field distributions
In this work we study the identification of spatial correlation in distributions of 2D scalar fields, presented across different forms of visual displays. We study simple visual displays that directly show color-mapped scalar fields, namely those drawn from a distribution, and whether humans can identify strongly correlated spatial regions in these displays. In this setting, the recognition of correlation requires making judgments on a set of fields, rather than just one field. Thus, in our exp…

Robust Residual Finite Scalar Quantization for Neural Compression
Xiaoxu Zhu
https://arxiv.org/abs/2508.15860 https://arxiv.org/pdf/2508.15860

Robust Residual Finite Scalar Quantization for Neural Compression
Finite Scalar Quantization (FSQ) has emerged as a promising alternative to Vector Quantization (VQ) in neural compression, offering simplified training and improved stability. However, naive application of FSQ in residual quantization frameworks suffers from the \textbf{residual magnitude decay problem}, where subsequent FSQ layers receive progressively weaker signals, severely limiting their effectiveness. We propose \textbf{Robust Residual Finite Scalar Quantization (RFSQ)}, a general framewo…

Probing scalar non-standard interaction of supernova neutrinos in next-generation neutrino experiments
Sudipta Das, Mary Hall Reno
https://arxiv.org/abs/2508.16510 https://

Probing scalar non-standard interaction of supernova neutrinos in next-generation neutrino experiments
A new neutrino-matter interaction can potentially affect neutrino propagation through matter. In this work, we explore the impact of a flavor-conserving scalar-mediated non-standard neutrino interaction in the supernova neutrino flux. We observe that the presence of scalar interaction involving muon and tau neutrinos (parameterized as $η_{μμ}$ and $η_{ττ}$, respectively) can invert the neutrino mass eigenstate in which three neutrino flavor states are produced inside the Supernova core, r…

Interacting Scalar Field Cosmology from Full Quantum Gravity
Tom R. Ladst\"atter, Luca Marchetti
https://arxiv.org/abs/2508.16194 https://arxiv.org/pd…

Interacting Scalar Field Cosmology from Full Quantum Gravity
We study the relational cosmological dynamics emerging from interacting group field theory (GFT) models minimally coupled to a massless clock scalar field and a self-interacting scalar field. We focus on two broad classes of GFT interactions - pseudosimplicial and pseudotensorial - which generalize simplicial and tensorial interactions, respectively. Treating these interactions perturbatively, we extract the effective cosmological dynamics using mean-field techniques. In the geometric sector, w…

Selection of functional predictors and smooth coefficient estimation for scalar-on-function regression models
Hedayat Fathi, Marzia A. Cremona, Federico Severino
https://arxiv.org/abs/2506.17773

Selection of functional predictors and smooth coefficient estimation for scalar-on-function regression models
In the framework of scalar-on-function regression models, in which several functional variables are employed to predict a scalar response, we propose a methodology for selecting relevant functional predictors while simultaneously providing accurate smooth (or, more generally, regular) estimates of the functional coefficients. We suppose that the functional predictors belong to a real separable Hilbert space, while the functional coefficients belong to a specific subspace of this Hilbert space. …

Inflation from a generalized exponential plateau: towards extra suppressed tensor-to-scalar ratios
Gerasimos Kouniatalis, Emmanuel N. Saridakis
https://arxiv.org/abs/2507.17721 …

Inflation from a generalized exponential plateau: towards extra suppressed tensor-to-scalar ratios
We investigate a standard minimally-coupled scalar-field inflationary scenario, which is based on a new potential, with suitably generalized plateau features, that leads to extra small tensor-to-scalar ratios. In particular, we consider a specific three-parameter potential, which has a flatter plateau and a steeper well compared to the Starobinsky potential in the Einstein frame. We study the inflationary realization and we show that it guarantees a prolonged period of slow-roll inflation and a…

The role of scalar current coupling along surfaces
F. A. Barone, L. H. C. Borges, G. Flores-Hidalgo, H. L. Oliveira, W. Y. A. da Silva
https://arxiv.org/abs/2507.15625

The role of scalar current coupling along surfaces
In this paper we propose a coupling between the complex scalar field and an external Dirac delta-like planar potential. The coupling is achieved through the Klein-Gordon current normal to the plane where the potential is concentrated. The results are obtained exactly and exhibit many peculiarities. We show that a complex scalar charge does not interact with the potential, but the potential modifies the interaction between two scalar charges if they are placed on opposite sides of the planar pot…

Scalar non-standard neutrino interactions in Galactic supernovae
Bhaskar Dutta, Aparajitha Karthikeyan, Nityasa Mishra, Yago Porto, Louis E. Strigari
https://arxiv.org/abs/2508.16558

Scalar non-standard neutrino interactions in Galactic supernovae
We analyze the prospects for studying scalar non-standard interactions (SNSI) using the neutrino burst from a Galactic supernova. SNSI modify the resonant flavor conversion and, correspondingly, the neutronization burst signal, and may be identifiable in future multi-tonne-scale experiments such as DUNE. We show that, in the presence of SNSI, neutrinos propagating out of the dense supernova environment acquire a density-squared-dependent contribution to their mass-squared differences, which in …

Stability of Big Bang singularity for the Einstein-Maxwell-scalar field-Vlasov system in the full strong sub-critical regime
Xinliang An, Taoran He, Dawei Shen
https://arxiv.org/abs/2507.18585

Stability of Big Bang singularity for the Einstein-Maxwell-scalar field-Vlasov system in the full strong sub-critical regime
In $3+1$ dimensions, we study the stability of Kasner solutions for the Einstein-Maxwell-scalar field-Vlasov system. This system incorporates gravity, electromagnetic, weak and strong interactions for the initial stage of our universe. Due to the presence of the Vlasov field, various new challenges arise. By observing detailed mathematical structures and designing new delicate arguments, we identify a new strong sub-critical regime and prove the nonlinear stability with Kasner exponents lying i…

Global finite energy solutions of the Maxwell-scalar field system on the Einstein cylinder
Jean-Philippe Nicolas, Grigalius Taujanskas
https://arxiv.org/abs/2507.16750

Global finite energy solutions of the Maxwell-scalar field system on the Einstein cylinder
We prove the existence and uniqueness of global finite energy solutions of the Maxwell-scalar field system in Lorenz gauge on the Einstein cylinder. Our method is a combination of a conformal patching argument, the finite energy existence theorem in Lorenz gauge on Minkowski space of Selberg and Tesfahun, a careful localization of finite energy data, and null form estimates of Foschi-Klainerman type. Although we prove that the energy-carrying components of the solution maintain regularity, due …

Small Scale Index Theory, Scalar Curvature, and Gromov's Simplicial Norms
Qiaochu Ma, Guoliang Yu
https://arxiv.org/abs/2508.14791 https://arxiv.org/pd…

Small Scale Index Theory, Scalar Curvature, and Gromov's Simplicial Norms
In this article, we study the topological complexity of manifolds with a lower scalar curvature bound. We introduce a small-scale index theorem to establish an upper bound on Gromov's simplicial norm of the Poincaré dual of the $\hat{A}$-class for Riemannian manifolds satisfying a scalar curvature lower bound. This result can be considered as a topological finiteness theorem for manifolds with a lower scalar curvature bound.

Optimizing Scalar Selection in Elliptic Curve Cryptography Using Differential Evolution for Enhanced Security
Takreem Haider
https://arxiv.org/abs/2508.13520 https://

Optimizing Scalar Selection in Elliptic Curve Cryptography Using Differential Evolution for Enhanced Security
Elliptic Curve Cryptography (ECC) is a fundamental component of modern public-key cryptosystems that enable efficient and secure digital signatures, key exchanges, and encryption. Its core operation, scalar multiplication, denoted as $k \cdot P$, where $P$ is a base point and $k$ is a private scalar, relies heavily on the secrecy and unpredictability of $k$. Conventionally, $k$ is selected using user input or pseudorandom number generators. However, in resource-constrained environments with wea…

A note on some reverse inequalities for scalar Birkhoff weak integrable functions
Anca Croitoru, Alina Iosif, Anna Rita Sambucini
https://arxiv.org/abs/2507.16332

A note on some reverse inequalities for scalar Birkhoff weak integrable functions
Some inequalities and reverses of classic Hölder and Minkowski types are obtained for scalar Birkhoff weak integrable functions with respect to a non-additive measure.

Analysis of $B\to KM_X$ and $B\to K^* M_X$ decays in scalar- and vector-mediator dark-matter scenarios
Alexander Berezhnoy, Wolfgang Lucha, Dmitri Melikhov
https://arxiv.org/abs/2508.16222

Analysis of $B\to KM_X$ and $B\to K^* M_X$ decays in scalar- and vector-mediator dark-matter scenarios
The surprising excess of missing-energy events far beyond all standard-model expectations in the weak decays of the charged ground-state $B^+$ meson into some charged strange meson, rather recently observed by the Belle-II experiment, may (easily) be explained by the decay of the $B$ meson into the strange meson and a pair of dark-matter fermion and antifermion, mediated by an (intermediate) scalar or vector boson. Thorough inspections of both the total and the differential widths of these deca…

Vacuum Energy and Topological Mass from a Constant Magnetic Field and Boundary Conditions in Coupled Scalar Field Theories
A. J. D. Farias Junior, Andrea Erdas, Herondy F. Santana Mota
https://arxiv.org/abs/2508.15121

Vacuum Energy and Topological Mass from a Constant Magnetic Field and Boundary Conditions in Coupled Scalar Field Theories
We investigate the combined effects of a uniform magnetic field and boundary conditions on vacuum energy and topological mass generation in a coupled scalar field theory. The system consists of a real scalar field, subject to Dirichlet boundary conditions, interacting via self- and cross-couplings with a gauge-coupled complex scalar field obeying mixed boundary conditions between two perfectly reflecting parallel plates. The magnetic field induces Landau quantization, leading to novel contribut…

$f$-mode Oscillations for Hyperons and H-dibaryons in Neutron Stars
Rajesh Maiti, Jesper Leong, Debarati Chatterjee, Anthony W. Thomas
https://arxiv.org/abs/2508.15912 https://

$f$-mode Oscillations for Hyperons and H-dibaryons in Neutron Stars
The fundamental ($f$-mode) oscillations of neutron stars are studied within the quark meson coupling model, a relativistic Hartree-Fock theory of dense nuclear matter, which takes into account the self-consistent modification of the valence quark structure of the bound baryons in the associated strong Lorentz scalar mean fields. For the first time, hyperons and H-dibaryons are included, along with the effects of potential additional short-range repulsion within this scheme, and their influence …

Fast Multipole Method for Maxwell's Equations in Layered Media
Heng Yuan, Bo Wang, Wenzhong Zhang, Wei Cai
https://arxiv.org/abs/2507.18491 https://arx…

Fast Multipole Method for Maxwell's Equations in Layered Media
We present a fast multipole method (FMM) for solving Maxwell's equations in three-dimensional (3-D) layered media, based on the magnetic vector potential $\boldsymbol A$ under the Lorenz gauge, to derive the layered dyadic Green's function. The dyadic Green's function is represented using three scalar Helmholtz layered Green's functions, with all interface-induced reaction field components expressed through a unified integral representation. By introducing equivalent polarization images for sou…

Searches for hidden sectors using $K^ \to\pi^ X$ decays
NA62 Collaboration
https://arxiv.org/abs/2507.17286 https://arxiv.org/pdf/250…

Searches for hidden sectors using $K^+\toπ^+X$ decays
Results from the study of the rare decays $K^+\toπ^+ν\barν$, $K^{+}\rightarrowπ^{+}μ^{+}μ^{-}$ and $K^{+}\rightarrowπ^{+}γγ$ at the NA62 experiment at CERN are interpreted in terms of improved limits for $\rm{B}(K^+\toπ^+X)$ and coupling parameters of hidden-sector models, where $X$ is a mediator. World-leading limits are achieved for dark photon, dark scalar and axion-like particle models.

Manifold Optics
Hongming Shen, Wen Xiao, Fei Fang Chuang, Huanyang Chen
https://arxiv.org/abs/2507.17437 https://arxiv.org/pdf/2507.17437

Manifold Optics
Transformation optics establishes an equivalence relationship between gradient media and curved space, unveiling intrinsic geometric properties of gradient media. However, this approach based on curved spaces is concentrated on two-dimensional manifolds, namely curved surfaces. In this Letter, we establish an intrinsic connection between three-dimensional manifolds and three-dimensional gradient media in transformation optics by leveraging the Yamabe problem and Ricci scalar curvature, a measur…

Chiral Invariant Mass Constraints from HESS J1731 347 in an Extended Parity Doublet Model with Isovector Scalar Meson
Yuk-Kei Kong, Bikai Gao, Masayasu Harada
https://arxiv.org/abs/2506.16684

Chiral Invariant Mass Constraints from HESS J1731 347 in an Extended Parity Doublet Model with Isovector Scalar Meson
The recent discovery of a central compact object (CCO) within the supernova remnant HESS J1731-347, with mass $0.77^{+0.20}_{-0.17} \ M_\odot $ and radius $10.4^{+0.86}_{-0.78}$ km is the lightest and smallest compact object ever observed. We identify it as an ultra-light Neutron star (NS) and constrain the chiral invariant mass of nucleon $m_0$ from the observational data of NS using an extended parity doublet model with including the isovector scalar meson $a_0(980)$. We study the higher orde…

Lensing Fingerprints of Scalar Hair and Broken Symmetries via Three Semi-Analytical Methods
Ali \"Ovg\"un, Reggie C. Pantig
https://arxiv.org/abs/2507.16512

Lensing Fingerprints of Scalar Hair and Broken Symmetries via Three Semi-Analytical Methods
We present a detailed derivation of the weak-field deflection of light in the scalar hairy black hole spacetime with scalar charge $Q_s$ and bumblebee gravity black hole spacetime, characterized by a Lorentz-violating parameter $\ell$. Starting from the metric, we derive the photon orbit equation up to second order in the small parameters $M/b$, $Q_s$ or $\ell$. Then we derive the weak-field deflection angle via three independent semi-analytical techniques- (1) Homotopy-Perturbation Method, (2)…

Fast and Accurate Reconstruction of Voronoi Generators in Large Tessellations
Carlos M Hernandez-Suarez
https://arxiv.org/abs/2506.19076 https://

Fast and Accurate Reconstruction of Voronoi Generators in Large Tessellations
A Voronoi diagram partitions the plane into convex cells, each containing the points closest to a single generator. Given such a tessellation, the inverse Voronoi problem seeks the generator set \( S \) that produced it. Our algorithm selects a single interior cell with \( k \) edges and solves a compact, consistent linear system with \( 2(k+1) \) unknowns and \( 4k \) scalar equations to recover that cell's generator together with the \( k \) generators of its neighbors in one step. The remain…

Can boundary configuration be tuned to optimize directional quantum steering harvesting?
Xiao-Li Huang, Xiao-Ying Jiang, Yu-Xuan Wang, Si-Yu Liu, Zejun Wang, Shu-Min Wu
https://arxiv.org/abs/2506.18734

Can boundary configuration be tuned to optimize directional quantum steering harvesting?
We investigate the harvesting of quantum steering and its asymmetry between two static detectors locally interacting with a vacuum massless scalar field near an infinite, perfectly reflecting boundary. The detectors are arranged either parallel or orthogonal to the boundary, with detector $B$ assumed to have an energy gap greater than or equal to that of detector $A$. It is interesting to observe that, with increasing distance between the detectors and the boundary, the boundary tends to suppre…

Information-minimizing stationary financial market dynamics
Eckhard Platen
https://arxiv.org/abs/2507.18395 https://arxiv.org/pdf/2507.18395

Information-minimizing stationary financial market dynamics
The paper derives the dynamics of a financial market from basic mathematical principles. It models the market dynamics using independent stationary scalar diffusions, assumes the existence of its growth optimal portfolio (GOP), interprets the market as a communication system, and minimizes, in an information-theoretical sense, the joint information of the risk-neutral pricing measure with respect to the real-world probability measure. In this information-minimizing market, its basic independent…

Kinetic coupling and dark matter on the lattice
K. Farakos, V. Iconomou, G. Koutsoumbas
https://arxiv.org/abs/2506.16984 https://arxi…

Kinetic coupling and dark matter on the lattice
We study a $U(1)\otimes U(1)$ system coupled to scalar fields. Initially the model is studied in a novel continuum formulation and study of the appropriate diagonalizations is performed. Three models are examined, in two of which the scalar field couples with both gauge fields while in the third one the scalar field couples only to the dark photon. The model is then treated on a space-time lattice. We determine the phase diagram for various values of the kinetic coupling parameter. Then there f…

Closure for Microscale Fluctuations in Chaotic Mixing Fronts
Heyman Joris, Le Borgne Tanguy, Lester Daniel
https://arxiv.org/abs/2506.15255 https://…

Closure for Microscale Fluctuations in Chaotic Mixing Fronts
Scalar mixing fronts are formed under the stirring and spreading action of a random velocity field. The prediction of concentration statistics below the velocity length scale is an open problem. Here, we show that when fluid agitation is caused by a smooth chaotic flow with weak persistence, the evolution of scalar variance can be uniquely related to the stirring and spreading properties of the flow and the diffusivity of the scalar. Using the spectral description of microscale scalar fluctuati…

Tropicalized quantum field theory and global tropical sampling
Michael Borinsky
https://arxiv.org/abs/2508.14263 https://arxiv.org/pdf/2508.14263

Tropicalized quantum field theory and global tropical sampling
We explain how to tropicalize scalar quantum field theory and show that tropicalized massive scalar quantum field theory is exactly solvable. This exact solution manifests as a non-linear recursion equation fulfilled by the expansion coefficients of the quantum effective action. Geometrically, this recursion computes specific volumes of moduli spaces of metric graphs and is thereby analogous to Mirzakhani's volume recursions on the moduli space of curves. Building on this exact solution, we con…

Constraining light dark matter in vector-scalar portals with COSI and AMEGO-X
Ma\'ira Dutra, Clarissa Siqueira, Tonia M. Venters
https://arxiv.org/abs/2508.15891 https://

Constraining light dark matter in vector-scalar portals with COSI and AMEGO-X
Detecting gamma-ray signals that could be due to dark matter (DM) particles would give us invaluable information about the nature of DM. In particular, gamma-ray lines could provide a way to measure the DM mass. The excellent energy resolution of the upcoming Compton Spectrometer and Imager (COSI) will allow us to probe underexplored regions of the DM parameter space while being sensitive to distinctive spectral features of potential DM signals. In this work, we consider a fermionic sub-GeV DM …

Can an Extra Degree of Freedom in Scalar-Tensor Non-Metricity Gravity Account for the Evolution of the Universe?
Ghulam Murtaza, Avik De, Andronikos Paliathanasis, Tee-How Loo
https://arxiv.org/abs/2506.17099

Can an Extra Degree of Freedom in Scalar-Tensor Non-Metricity Gravity Account for the Evolution of the Universe?
We investigate whether the extra scalar degree of freedom that arises in the second connection class of scalar-tensor non-metricity gravity can accurately replicate and potentially enrich the cosmic expansion history. Focusing on a spatially flat FLRW background, we introduce Hubble-normalized variables and recast the field equations into an autonomous dynamical system. Four representative scenarios are analyzed comprehensively. Phase-space research reveals a rich hierarchy of critical points: …

Radiatively Corrected Starobinsky Inflation and Primordial Gravitational Waves in Light of ACT Observations
Waqas Ahmed, Mansoor Ur Rehman
https://arxiv.org/abs/2506.18077

Radiatively Corrected Starobinsky Inflation and Primordial Gravitational Waves in Light of ACT Observations
Nonminimal coupling between the inflaton and the Ricci scalar plays a crucial role in shaping the predictions of single-field inflationary models. While a quartic potential with such coupling represents one of the simplest realizations compatible with cosmological observations, it generically receives important radiative corrections when the inflaton interacts with other fields, particularly those involved in the reheating process. In this work, we focus on radiative corrections arising from bo…

Multiple nodal solutions to a scalar field equation with double-power nonlinearity and zero mass at infinity
M\'onica Clapp, Carlos Culebro
https://arxiv.org/abs/2508.15167 …

Multiple nodal solutions to a scalar field equation with double-power nonlinearity and zero mass at infinity
We consider the nonlinear elliptic equation \begin{equation*} -Δu + V(x)u = f(u), \qquad u\in D^{1,2}_0(Ω), \end{equation*} in an exterior domain $Ω$ of $\mathbb{R}^N$, where $V$ is a scalar potential that decays to zero at infinity and the nonlinearity $f$ is subcritical at infinity and supercritical near the origin. Under weak symmetry assumptions, we provide conditions that guarantee that this problem has a prescribed number of sign-changing solutions. In particular, we show that in dimen…

Observational Constraints on Scalar Field--Matter Interaction in Weyl Integrable Spacetime
Andronikos Paliathanasis
https://arxiv.org/abs/2506.16223 https:…

Observational Constraints on Scalar Field--Matter Interaction in Weyl Integrable Spacetime
We test an analytic cosmological solution within the framework of Weyl Integrable Spacetime using current observational data. In this model, dark energy is described by a pressureless fluid, while a scalar field arises naturally through the definition of the connection. This gravitational theory reveals a Chameleon Mechanism leading to a nonzero interaction between the scalar field and the matter sector. This model extends the standard $Λ$CDM cosmology by introducing one additional degree of f…

Experimental Determination of BSM Triple Higgs Couplings at the HL-LHC with Neural Networks
Markus Frank, Sven Heinemeyer, Margarete M\"uhlleitner, Kateryna Radchenko
https://arxiv.org/abs/2506.18981

Experimental Determination of BSM Triple Higgs Couplings at the HL-LHC with Neural Networks
The shape of the Higgs potential is modified by the presence of additional scalar fields, as predicted in many Beyond-Standard-Model (BSM) scenarios. In such cases, deviations in the Higgs self-interactions, in particular the trilinear Higgs couplings, could serve to disentangle the physics beyond the Standard Model (SM). While the SM predicts only one trilinear Higgs coupling, extended scalar sectors allow for additional self-interactions that can manifest themselves in Higgs pair production, …

Search for a new scalar resonance decaying to a Higgs boson and another new scalar particle in the final state with two bottom quarks and two photons in proton-proton collisions at $\sqrt{s}$ = 13 TeV
CMS Collaboration
https://arxiv.org/abs/2508.11494

Search for a new scalar resonance decaying to a Higgs boson and another new scalar particle in the final state with two bottom quarks and two photons in proton-proton collisions at $\sqrt{s}$ = 13 TeV
A search is presented for a new scalar resonance, X, decaying to a standard model Higgs boson and another new scalar particle, Y, in the final state where the Higgs boson decays to a $\mathrm{b\bar{b}}$ pair, while the Y particle decays to a pair of photons. The search is performed in the mass range 240$-$100 \GeV for the resonance X, and in the mass range 70$-$800 GeV for the particle Y, using proton-proton collision data collected by the CMS experiment at $\sqrt{s}$ = 13 TeV, corresponding to…

Page Curve for an Evaporating Schwarzschild Black Hole in Dimensionally-Reduced Model of Dilaton Gravity
Stefan {\DJ}or{\dj}evi\'c, Voja Radovanovi\'c
https://arxiv.org/abs/2507.17855

Page Curve for an Evaporating Schwarzschild Black Hole in Dimensionally-Reduced Model of Dilaton Gravity
We study entanglement entropy of quantum fields in a (1+1)-dimensional model of dilaton gravity derived from the four-dimensional Einstein-Hilbert action by dimensional reduction. Scalar matter is coupled to gravity, while the back-reaction is included via the Polyakov-Liouville action. This theory exhibits both eternal and evaporating Schwarzschild black hole solutions. The fine-grained entropy in a collapse scenario is investigated by applying the "island rule" via the quantum extremal surfac…

Dirac, Schroedinger, and Maxwell equations in scalar and vector field quantum mechanics
Boris Chichkov
https://arxiv.org/abs/2508.14583 https://arxiv.org/p…

Dirac, Schroedinger, and Maxwell equations in scalar and vector field quantum mechanics
The quantum theory of relativistic particles, based on the first quantization technique similar to that used by Schroedinger and Dirac in formulating quantum mechanics, is reconsidered on the basis of a photon-like dispersion relation corresponding to the energy conservation equation of Einstein's special relativity. First, scalar quantum mechanics of particles operating with their wave functions is discussed. Using the first quantization of the photon-like dispersion relation, very simple new …

Two scalarizations of magnetically charged black holes
Yun Soo Myung
https://arxiv.org/abs/2507.17086 https://arxiv.org/pdf/2507.17086

Two scalarizations of magnetically charged black holes
We study two scalarizations of magnetically charged black holes in the Einstein-Gauss-Bonnet-scalar theory with the nonlinear electrodynamics (NED) term. For this purpose, two scalar coupling functions $f_1(ϕ)$ and $f_2(ϕ)$ are introduced to couple to Gauss-Bonnet (GB) and NED terms. The bald black hole is described by mass ($M$) and action parameter ($α$) with magnetic charge ($P$), which becomes the quantum Oppenheimer-Snyder black hole for $P=M$ whose action is still unknown. We derive Sm…

Statistical conservation laws for scalar model problems: Hierarchical evolution equations
Qian Huang, Christian Rohde
https://arxiv.org/abs/2508.15359 https://

Statistical conservation laws for scalar model problems: Hierarchical evolution equations
The probability density functions (PDFs) for the solution of the incompressible Navier-Stokes equation can be represented by a hierarchy of linear equations. This article develops new hierarchical evolution equations for PDFs of a scalar conservation law with random initial data as a model problem. Two frameworks are developed, including multi-point PDFs and single-point higher-order derivative PDFs. These hierarchies capture statistical correlations and guide closure strategies.

Prescribed Chern scalar curvatures on complete Hermitian manifolds
Weike Yu
https://arxiv.org/abs/2506.14592 https://arxiv.org/pdf/25…

Prescribed Chern scalar curvatures on complete Hermitian manifolds
In this paper, we investigate the problem of prescribing Chern scalar curvatures on complete Hermitian manifolds. Firstly, we re-prove our recent result for prescribing sign-changing Chern scalar curvatures on compact Hermitian manifolds by using the classical maximum principle. Secondly, we study this problem on complete noncompact Hermitian manifolds, and generalize the Aviles-McOwen's existence results [J. Differential Geom., 21 (1985): 269-281] from Poincaré disks to higher dimensional Her…

Non-Gaussian statistics in galaxy weak lensing: compressed three-point correlations and cosmological forecasts
Sofia Samario-Nava, Alejandro Aviles, Juan Carlos Hidalgo
https://arxiv.org/abs/2506.19811

Non-Gaussian statistics in galaxy weak lensing: compressed three-point correlations and cosmological forecasts
Building on previous developments of a harmonic decomposition framework for computing the three-point correlation function (3PCF) of projected scalar fields over the sky, this work investigates how much cosmological information is contained in these higher-order statistics. We perform a forecast to determine the number of harmonic multipoles required to capture the full information content of the 3PCF in the context of galaxy weak lensing, finding that only the first few multipoles are sufficie…

\kappa-deformed spin-1/2 field
Tadeusz Adach, Andrea Bevilacqua, Jerzy Kowalski-Glikman, Giacomo Rosati, Wojciech Wi\'slicki
https://arxiv.org/abs/2507.18336 https://…

κ-deformed spin-1/2 field
In this paper, we investigate the $κ$-deformed theory of a spin-1/2 field. We construct an action that is Poincaré invariant and analyze its consequences within the deformed framework. Our results confirm the findings of our recent analysis of the $κ$-deformed scalar field, where we established that there is no action invariant under both Poincaré symmetry and charge conjugation in the $κ$-deformed case. Furthermore, we present an explicit calculation of the Noether charges associated with…

Quasibound states of massive charged scalars around dilaton black holes in $2 1$ dimensions: Exact frequencies
H. S. Vieira
https://arxiv.org/abs/2506.18740

Quasibound states of massive charged scalars around dilaton black holes in $2+1$ dimensions: Exact frequencies
In this work, we investigate massive charged scalar perturbations in the background of three-dimensional dilaton black holes with a cosmological constant. We demonstrate that the wave equations governing the dynamics of these perturbations are exactly solvable, with the radial part expressible in terms of confluent Heun functions. The quasibound state frequencies are computed analytically, and we examine their dependence on the scalar field's mass and charge, as well as on the black hole's mass…

Phenomenology of scalar particles assisted by machine learning
E. A. Herrera-Chac\'on
https://arxiv.org/abs/2507.15019 https://ar…

Phenomenology of scalar particles assisted by machine learning
In this thesis, we explore the phenomenology of scalar particles within Beyond Standard Model frameworks, using Machine Learning (ML) techniques to enhance sensitivity and discovery potential at current and future collider experiments, the Large Hadron Collider (LHC) and the High-Luminosity LHC (HL-LHC). Specifically, we study scalar extensions of the Standard Model such as the Two Higgs Doublet Model Type-III (2HDM-III) and the Froggatt-Nielsen Flavon model. We perform a detailed collider anal…

Gravitational Baryogenesis Constraints on Nojiri-Odintsov $f(R)$ Gravity
Kalyan Malakar, Mrinnoy M Gohain, Kalyan Bhuyan
https://arxiv.org/abs/2506.18949 h…

Gravitational Baryogenesis Constraints on Nojiri-Odintsov $f(R)$ Gravity
This paper focuses on exploring the imbalance between matter and antimatter via the gravitational baryogenesis mechanism within the framework of Nojiri-Odintsov $f(R)$ gravity models in a spatially flat FLRW universe, where $R$ is the Ricci curvature scalar. This mechanism is based on \(\mathcal{CP}\)-violation generated via introducing an interaction between baryonic matter current (\(J^μ\)) and the derivative of curvature scalar (\(\partial_μR\)), which finally results in the baryon asymmet…

Proofs of singularity-free solutions and scalarization in nonlinear Einstein-scalar-Gauss-Bonnet cosmology
Chihang He, Chao Liu, Jinhua Wang
https://arxiv.org/abs/2507.15304

Proofs of singularity-free solutions and scalarization in nonlinear Einstein-scalar-Gauss-Bonnet cosmology
We establish the global existence and precise estimates of a class of singularity-free cosmological solutions in nonlinear Einstein-scalar-Gauss-Bonnet (ESGB) gravity with quadratic coupling, in close agreement with previous numerical results. Our analysis also yields a rigorous mathematical proof of nonlinear spontaneous scalarization, triggered by a tachyonic instability induced by the Gauss-Bonnet term. The proof is based on a set of decoupled differential inequalities for the Hubble paramet…

Cancellation of one-loop correction to soft tensor power spectrum
Yohei Ema, Muzi Hong, Ryusuke Jinno, Kyohei Mukaida
https://arxiv.org/abs/2506.15780 http…

Cancellation of one-loop correction to soft tensor power spectrum
We demonstrate that there are no scale-invariant one-loop corrections to the superhorizon tensor perturbations from small-scale (potentially enhanced) scalar perturbations, irrespective of the details of inflationary background time evolution. For this purpose we derive a soft tensor effective field theory at leading order in the gradient expansion by integrating out small-scale scalar fluctuations in a general time-dependent background over the Schwinger-Keldysh contour, i.e., we perform loop …

Renormalization group for effective field theories: cutoff schemes and universality
Jose Gaite
https://arxiv.org/abs/2507.17573 https://arxiv.org/pdf/2507.…

Renormalization group for effective field theories: cutoff schemes and universality
In effective field theories, the concept of renormalization of perturbative divergences is replaced by renormalization group concepts such as relevance and universality. Universality is related to cutoff scheme independence in renormalization. Three-dimensional scalar field theory with just the quartic coupling is universal but the less relevant sextic coupling introduces a cutoff scheme dependence, which we quantify by three independent parameters, in the two-loop order of perturbation theory.…

Compact stars in Einstein-scalar-Gauss-Bonnet gravity: regular and divergent scalar field configurations
Roberto D. Alba Q., Javier Chagoya, Armando A. Roque
https://arxiv.org/abs/2508.13273

Compact stars in Einstein-scalar-Gauss-Bonnet gravity: regular and divergent scalar field configurations
We investigate static, spherically symmetric solutions in Einstein-scalar-Gauss-Bonnet gravity non-minimally coupled to a massless real scalar field, both in vacuum and in the presence of fermionic matter. Focusing on a specific quadratic scalar-Gauss-Bonnet coupling, we identify two distinct classes of compact objects: one with a regular scalar field at the origin -- connected to general relativity in an appropriate limit -- and another {one} with a divergent scalar field at the origin but a r…

Covering instability for the existence of positive scalar curvature metrics
Chao Li, Boyu Zhang
https://arxiv.org/abs/2506.13885 https://

Covering instability for the existence of positive scalar curvature metrics
We show that a closed non-orientable $3$-manifold admits a positive scalar curvature metric if and only if its orientation double cover does; however, for each $4\le n\le 7$, there exist infinitely many non-homeomorphic smooth non-orientable $n$--manifolds such that each of them does not admit any Riemannian metric with positive scalar curvature, but its orientation double cover does. These examples were first introduced by Alpert--Balitskiy--Guth in the study of Urysohn widths. To prove the …

Matter Spectral Functions from Quantum Gravity
Varun Kher, Brandon King, Daniel F. Litim, Manuel Reichert
https://arxiv.org/abs/2507.17862 https://arxiv.or…

Matter Spectral Functions from Quantum Gravity
We investigate Lorentzian quantum gravity coupled to a template matter sector with gauge fields, scalars and fermions. In the absence of quantised gravity, the matter sector by itself is renormalisable, but UV-incomplete. Provided quantum gravity offers an asymptotically safe UV-completion, we determine the photon and scalar two-point functions in the presence of gravitational fluctuations, and show that both possess a Källén-Lehmann spectral representation. Our results are achieved using fun…

Monodromic Dark Energy and DESI
Samuel Goldstein, Marco Celoria, Fabian Schmidt
https://arxiv.org/abs/2507.16970 https://arxiv.org/pdf/2507.16970

Monodromic Dark Energy and DESI
Recent baryon acoustic oscillation (BAO) measurements from the Dark Energy Spectroscopic Instrument (DESI) collaboration have renewed interest in dynamical dark energy models, particularly those that cross the "phantom divide" ($w_{\rm DE} = -1$). We present the first observational constraints on monodromic k-essence, a physically motivated scalar field dark energy scenario capable of realizing rapid oscillations about the phantom divide. Using cosmic microwave background (CMB) information, DES…

Strong scale-dependence does not enhance the kinematic boosting of gravitational wave backgrounds
Giorgio Mentasti, Carlo R. Contaldi, Marco Peloso
https://arxiv.org/abs/2507.16901

Strong scale-dependence does not enhance the kinematic boosting of gravitational wave backgrounds
Existing expressions in the literature appear to indicate that Doppler boosting, due to our proper motion with respect to the isotropic frame of the universe, can amplify stochastic gravitational wave backgrounds whose energy spectra exhibit strong scale dependence, for example, those generated by large scalar perturbations in models of primordial black holes or by astrophysical populations with broken power-law behaviour. It has been suggested that this enhancement could increase the signal-to…

The Scotogenic Model with Two Inert Doublets: Parameters Space and Electroweak Precision Tests
Abdelrahman AbuSiam (University of Sharjah), Amine Ahriche (University of Sharjah)
https://arxiv.org/abs/2506.18051

The Scotogenic Model with Two Inert Doublets: Parameters Space and Electroweak Precision Tests
In this work, we study a scotogenic extension of the Standard Model featuring two inert scalar doublets and three singlet Majorana fermions, where neutrino masses are generated radiatively at one loop. The lightest among the Majorana fermions and neutral scalars can serve as dark matter candidates. We explore the parameter space, considering theoretical constraints (perturbativity, unitarity, vacuum stability) and experimental limits (lepton flavor violation, Higgs measurements, electroweak pre…

Radial Oscillations of Scalar Hair in Black Hole Bombs
Lang Zhao, Lin Chen, Cheng-Yong Zhang
https://arxiv.org/abs/2508.15477 https://arxiv.org/pdf/2508.15…

Radial Oscillations of Scalar Hair in Black Hole Bombs
Recent research has revealed a novel nonlinear mechanism, distinct from the linear superradiant instability, which triggers the black hole bomb phenomenon. Introducing a massive complex scalar field with nonlinear self-interactions drives the Reissner-Nordström black hole to shed substantial energy, thereby triggering a black hole bomb. Radial oscillations in the scalar hair profile are observed during this process. In this paper, we further reveal that physical quantities associated with scal…

Future stability of solutions of the Einstein-nonlinear scalar field system with decelerated expansion
Louie Bernhardt
https://arxiv.org/abs/2508.15303 https://

Future stability of solutions of the Einstein-nonlinear scalar field system with decelerated expansion
We study solutions to the Einstein equations coupled to a nonlinear scalar field with exponential potential. This system admits Friedmann-Lemaître-Robertson-Walker solutions undergoing decelerated expansion, with $\mathbb{T}^3$ spatial topology and scale factor $a(t) = t^p$ for $1/3 < p < 1$. For each $p \in (2/3,1)$, we prove that the corresponding FLRW spacetime is future-stable as a solution to the Einstein-nonlinear scalar field system. Given initial data on a spacelike hypersurface that i…

Testing the heavy decaying sterile neutrino hypothesis at the DUNE near detector
Sabya Sachi Chatterjee, St\'ephane Lavignac, O. G. Miranda
https://arxiv.org/abs/2508.15888 …

Testing the heavy decaying sterile neutrino hypothesis at the DUNE near detector
One of the most convincing explanations of the LSND and MiniBooNE anomalies relies on a heavy, mostly sterile neutrino with a small muon neutrino component, which decays to an electron neutrino and an invisible light scalar field. We investigate the possibility to test this hypothesis at the near detector complex of the upcoming DUNE experiment. We find that the DUNE liquid argon near detector (ND-LAr) can probe a larger region of the parameter space than the Fermilab SBN program, and may help …

Inflationary Fossils Beyond Perturbation Theory
Riccardo Impavido, Nicola Bartolo
https://arxiv.org/abs/2507.17593 https://arxiv.org/pdf/2507.17593

Inflationary Fossils Beyond Perturbation Theory
In this work we provide the missing link between two approaches aimed at characterizing the effect of long perturbation modes in Inflation. We consider the Inflationary Fossils' approach (arXiv:1203.0302 and related works) that characterizes the power-spectrum of the inflaton field in presence of other long and non dynamical fossil fields, and a technique, appeared in arXiv:2103.09244, that computes, beyond perturbation theory, the power-spectrum of a scalar field in presence of a large fluctua…

Black Hole Mass/Charge Relation and Weak No-hair Theorem Conjecture
Guan-Yi Lu, Meng-Nan Yang, H. Lu
https://arxiv.org/abs/2508.14158 https://arxiv.org/pdf…

Black Hole Mass/Charge Relation and Weak No-hair Theorem Conjecture
We consider Einstein gravity minimally coupled to two Maxwell fields and one dilaton scalar. We study the electrically-charged spherically-symmetric and static solutions that are asymptotic to Minkowski spacetime. General solutions are described by four independent parameters: mass $M$, two electric charges $(Q_1,Q_2)$ and the scalar charge $Σ$. For black holes, the scalar charge is not independent, but a function of $(M,Q_1,Q_2)$. We provide a set of formulae relating the mass to the charges,…

Renormalization Group Running of the Minimal Leptophilic Dark Matter Model toward UV Completion
Osamu Seto, Tetsuo Shindou, Takanao Tsuyuki
https://arxiv.org/abs/2508.16299 http…

Renormalization Group Running of the Minimal Leptophilic Dark Matter Model toward UV Completion
We study renormalization group running of the coupling constants in a minimal leptophilic dark matter model in which a Standard Model singlet fermion, acting as the DM candidate, couples exclusively to right-handed charged leptons via a new charged scalar mediator. Reproduction of the observed thermal relic abundance of the DM candidate requires sizable Yukawa couplings, and such sizable Yukawa couplings can significantly affect the renormalization group evolution of the model parameters. We ex…

UV completions of scalar-tensor EFTs
Edoardo Alviani, Adam Falkowski, Panagiotis Marinellis
https://arxiv.org/abs/2507.11426 https://…

UV completions of scalar-tensor EFTs
We study models that give rise to scalar-tensor effective field theories (EFTs) at low energies. Our framework involves massive particles of spin $S=0, 1/2, 1$ coupled to gravity and to a real massless scalar in the UV. Integrating out the massive states leads to a scalar-tensor EFT describing the massless graviton and scalar degrees of freedom. Using the on-shell amplitude methods and the spinor-helicity formalism, we match the two frameworks at one loop, so as to express the EFT Wilson coeffi…

Thermal modifications of mesons and energy-energy correlators from real-time simulations of a $U(1)$ lattice gauge theory
Jo\~ao Barata, David Frenklakh, Swagato Mukherjee
https://arxiv.org/abs/2507.16890

Thermal modifications of mesons and energy-energy correlators from real-time simulations of a $U(1)$ lattice gauge theory
We investigate thermal properties of a $U(1)$ lattice gauge theory in $1+1$-dimensions through real-time simulations. We extract the spectral functions directly coupling to the pseudoscalar and scalar mesons, demonstrating the thermal modifications of these states with increasing temperatures. Introducing the notion of energy-flow operators, we quantify the temporal build-up of correlations in the energy flows across the lattice. We demonstrate that energy-energy correlators fail to factorize t…

Enhancement of first-order phase transitions through a mass-acquiring scalar field
Yuan-Jie Li, Jing Liu, Zong-Kuan Guo
https://arxiv.org/abs/2508.14665 https://

Enhancement of first-order phase transitions through a mass-acquiring scalar field
Phase transitions in the early Universe give rise to effective masses for massless fields in the symmetry-broken phase. We use the lattice simulations to investigate the impact of a spectator scalar field with mass generation on the dynamics of first-order phase transitions and the generation of gravitational waves. In addition to the well-known friction effects, we identify a novel effect that significantly enhances the strength of first-order phase transitions. The amplitude of the mass-acqui…

Semiclassical polymer field with a cubic potential in cosmology
Ahsan Mujtaba, Syed Moeez Hassan
https://arxiv.org/abs/2508.16416 https://arxiv.org/pdf/250…

Semiclassical polymer field with a cubic potential in cosmology
We study the semiclassical dynamics of a polymer quantized scalar field with a cubic potential in cosmology. The cosmological spacetime is chosen to be homogeneous and isotropic, and we work in the polymer quantization scheme where the field operator does not exist directly. The dynamics are studied in the `e-fold' time gauge, where a choice of time gauge fixing, in terms of the scale factor, is made at the classical level. The cubic potential is interesting to study because it is unbounded fro…

Electroweak Precision Constraints on Dark Photon Models with Generalized Mixing
Enrico Bertuzzo, Csaba Csaki, Fernanda Huller
https://arxiv.org/abs/2507.16888

Electroweak Precision Constraints on Dark Photon Models with Generalized Mixing
We present a global fit to electroweak precision observables (EWPOs) in dark photon (DP) models containing both kinetic and mass mixing between the DP and the neutral gauge bosons of the Standard Model (SM). Such more general mixing can be the result of an extended scalar sector, which we specify in this paper. We calculate the tree-level contributions to EWPOs due to the mixing with the DP, as well as the leading loop corrections to the oblique parameters due to the extended Higgs sector. In t…

Five-loop Anomalous Dimensions of Cubic Scalar Theory from Operator Product Expansion
Rijun Huang, Qingjun Jin, Yi Li
https://arxiv.org/abs/2508.13620 https://

Five-loop Anomalous Dimensions of Cubic Scalar Theory from Operator Product Expansion
Recently, an Operator Product Expansion method has been proposed for renormalization in quantum field theories. This method extracts UV divergences from two-point propagator-type integrals, and it is believed to be applicable to generic QFTs. In the present work, we apply the OPE method to the renormalization of scalar theory with cubic interactions in six-dimensions. We have successfully computed the 5-loop corrections to the anomalous dimensions of the $ϕ^Q$ operator, as well as the large $N…

Connecting Early Dark Energy to Late Dark Energy by the Diluting Matter Potential
Eduardo I. Guendelman, Ramon Herrera, Pedro Labrana
https://arxiv.org/abs/2507.17095 https://…

Connecting Early Dark Energy to Late Dark Energy by the Diluting Matter Potential
In this work we study a scale invariant gravity theory containing two scalar fields, dust particles and a measure defined from degrees of freedom independent of the metric. The integration of the degrees of freedom that define the measure spontaneously break the scale symmetry, leaving us in the Einstein frame with an effective potential that is dependent on the density of the particles. The potential contains three flat regions, one for inflation, another for early dark energy and the third fo…

The QCD scalar susceptibility and thermal scalar resonances in chiral symmetry restoration
Angel G\'omez Nicola, Andrea Vioque-Rodr\'iguez
https://arxiv.org/abs/2506.14599

The QCD scalar susceptibility and thermal scalar resonances in chiral symmetry restoration
Building upon recent results on the role of thermal resonances in chiral symmetry restoration, we show that a description of the QCD scalar susceptibility at finite temperature $T$ saturated by the thermal properties of the lightest scalar resonance, the $f_0(500)$, is compatible both with lattice QCD data at nonzero $T$ and with the $T=0$ light resonance properties coming from experimental data. The thermal $f_0(500)$ is generated within the framework of Unitarized Chiral Perturbation Theory. …

Negative potential-induced scalarization in the Einstein-Euler-Heisenberg black hole
Hong Guo, Miok Park, Yun Soo Myung
https://arxiv.org/abs/2508.16083 https://

Negative potential-induced scalarization in the Einstein-Euler-Heisenberg black hole
We investigate a negative potential-induced scalarization of the Einstein-Euler-Heisenberg (EEH) black hole in the EEH-scalar (EEHS) theory, characterized by mass $M$, Euler-Heisenberg parameter $μ$, and magnetic charge $q$. Within this framework, the charge $q$ can exceed the extremal bound $q/M > 1$, and a single event horizon is maintained provided the parameter $μ$ exceeds the $μ_{\text{max}} = 0.019$, with the ADM mass fixed at $M = 1/2$. We obtain a single branch of scalarized EEH (sEE…

Lepton flavor violating top quark FCNC at the $\mu$TRISTAN
Abhik Sarkar
https://arxiv.org/abs/2506.18015 https://arxiv.org/pdf/2506.1…

Lepton flavor violating top quark FCNC at the $μ$TRISTAN
We investigate charged lepton flavor violating top quark flavor-changing neutral current interactions at the proposed asymmetric muon-electron collision stage of the $μ$TRISTAN collider, operating at a center-of-mass energy of 346 GeV. Specifically, we study the process $μ^{+} e^{-} \rightarrow t q$ ($t \overline{q} + \overline{t}q$) with $q = u, c$, within the framework of three classes of four-fermion contact interactions: scalar, vector, and tensor operators. A cut-based analysis is perfor…

Observational constraints on inflationary models with non-minimally derivative coupling by ACT
Qing Gao, Yanjiang Qian, Yungui Gong, Zhu Yi
https://arxiv.org/abs/2506.18456

Observational constraints on inflationary models with non-minimally derivative coupling by ACT
The most recent data release from the Atacama Cosmology Telescope (ACT) reveals a larger value of the scalar spectral tilt $n_s$, ruling out a broad class of inflationary attractors. In this paper, we consider inflationary models including the power law potential, the hilltop model, the polynomial $α$-attractor and exponential $α-$attractor, with non-minimally derivative coupling in the high friction limit, and show how the models can fit ACT data. We also derive constraints on the model para…

Hydrodynamical transports in generic AdS Gauss-Bonnet-scalar Gravity
Chenwei Tong, Rohit Mishra, Yanqi Wang, Song He
https://arxiv.org/abs/2507.13184 https…

Hydrodynamical transports in generic AdS Gauss-Bonnet-scalar Gravity
The experimentally observed temperature-dependent shear and bulk viscosities of the quark-gluon plasma (QGP), along with its apparent violation of the Kovtun-Son-Starinets (KSS) bound $η/s=1/(4π)$, necessitate a holographic description that incorporates higher-derivative corrections. We propose a five-dimensional Einstein-Scalar-Maxwell-Gauss-Bonnet model in which a scalar-Gauss-Bonnet coupling $H(ϕ)$ encodes leading curvature corrections. Although no closed-form black hole solution is avail…

Beyond the Veil: Charting WIMP Territories at the Neutrino Floor
Giorgio Arcadi, Manfred Lindner, Stefano Profumo
https://arxiv.org/abs/2507.16987 https://…

Beyond the Veil: Charting WIMP Territories at the Neutrino Floor
We establish comprehensive theoretical benchmarks for Weakly Interacting Massive Particles (WIMPs) accessible to ultimate direct detection experiments, focusing on the challenging parameter space between current experimental limits and the irreducible neutrino background. We systematically examine both thermal freeze-out and freeze-in production mechanisms across a range of simplified dark matter models, including s-channel scalar and vector portals, t-channel mediator scenarios, and electrowea…

On the stability of exceptional Brans-Dicke wormholes
Kirill A. Bronnikov, Sergei V. Bolokhov, Milena V. Skvortsova, Rustam Ibadov, Feruza Y. Shaymanova
https://arxiv.org/abs/2507.17045

On the stability of exceptional Brans-Dicke wormholes
In our previous papers we have analyzed the stability of vacuum and electrovacuum static, spherically symmetric space-times in the framework of the Bergmann-Wagoner-Nordtvedt class of scalar-tensor theories (STT) of gravity. In the present paper, we continue this study by examining the stability of exceptional solutions of the Brans-Dicke theory with the coupling constant $ω=0$ that were not covered in the previous studies. Such solutions describe neutral or charged wormholes and involve a con…

ACT-Era Constraints on Single-Field Inflation in $f(T)$ Teleparallel Gravity
Feng-Yi Zhang, Rongrong Zhai, Li-Yang Chen
https://arxiv.org/abs/2508.16530 https://

ACT-Era Constraints on Single-Field Inflation in $f(T)$ Teleparallel Gravity
We reassess single-field slow-roll inflation in teleparallel gravity with $f(T)=C\,T^{2δ+1}$, motivated by recent measurements from the Atacama Cosmology Telescope (ACT) that indicate a modest upward shift in the scalar spectral index $n_s$. Using analytic approximations together with high-precision numerical calculations, we compute primordial predictions for representative potentials: power-law monomials, hilltop models, and $E$-type plateaus. We find that torsional corrections controlled by…

Greybody factors in Horndeski gravity and beyond
Georgios Antoniou, Thomas D. Pappas, Panagiota Kanti
https://arxiv.org/abs/2507.17329 https://arxiv.org/pd…

Greybody factors in Horndeski gravity and beyond
In the framework of the beyond Horndeski action, we consider three sub-theories, that support scalarised black-hole solutions, and look for modified characteristics compared to GR. We first study the propagation of massless scalar and vector test fields in the fixed background of an analytical spherically-symmetric black hole derived in the context of a parity-symmetric beyond Horndeski theory, and show that the profiles of the effective gravitational potentials, greybody factors, absorption cr…

Gravity and the Higgs boson mass
Carlo Branchina, Vincenzo Branchina, Filippo Contino, Riccardo Gandolfo, Arcangelo Pernace
https://arxiv.org/abs/2507.13832

Gravity and the Higgs boson mass
According to usual calculations in quantum field theory, both in flat and curved spacetime, the mass $m^2$ of a scalar particle is quadratically sensitive to the ultimate scale of the theory, the UV physical cutoff $Λ$. In the present work, paying attention to the path integral measure and to the way $Λ$ is introduced, we calculate the one-loop effective action $Γ^{1l}$ for a scalar field on a non-trivial gravitational background. We find that $m^2$ presents only a (mild) logarithmic sensiti…

Cosmological Analysis of $f(R, \Sigma, T)$ Gravity with EoS Parameterization
S. H. Shekh, N. Myrzakulov, Anil Kumar Yadav, Anirudh Pradhan
https://arxiv.org/abs/2506.18953

Cosmological Analysis of $f(R, Σ, T)$ Gravity with EoS Parameterization
In this paper, we present a comprehensive cosmological analysis within the framework of $f(R, Σ, T)$ gravity, a modified theory that incorporates nonlinear matter-geometry coupling via the inclusion of both the trace of the energy-momentum tensor $T$ and the scalar $Σ= T_{μν}T^{μν}$. We consider a spatially flat Friedmann-Robertson-Walker (FRW) universe and introduce a linear parameterization for the equation of state (EoS) parameter based on the Chevallier-Polarski-Linder (CPL) form, whi…

Dancing in the dark: probing Dark Matter through the dynamics of eccentric binary pulsars
Giorgio Nicolini, Andrea Maselli, Miguel Zilh\~ao
https://arxiv.org/abs/2507.16904 http…

Dancing in the dark: probing Dark Matter through the dynamics of eccentric binary pulsars
We investigate the dynamics of eccentric binary pulsars embedded in dark matter environments. While previous studies have primarily focused on circular orbits in collisionless dark matter halos, we extend this framework to eccentric systems and explore their interaction with ultralight scalar fields. Adopting a perturbative approach, we compute the modifications to the orbital period induced by dark matter-driven dynamical friction. Our results show that orbital eccentricity amplifies the impri…

Quantum thermodynamics in a rotating BTZ black hole spacetime
Wenjing Chen, Yixuan Ma, Si-Wei Han, Zihao Wang, Jun Feng
https://arxiv.org/abs/2507.16787 ht…

Quantum thermodynamics in a rotating BTZ black hole spacetime
We address the problem of the thermalization process for an Unruh-DeWitt (UDW) detector outside a BTZ black hole, from a perspective of quantum thermodynamics. In the context of an open quantum system, we derive the complete dynamics of the detector, which encodes a complicated response to scalar background fields. Using various information theory tools, such as quantum relative entropy, quantum heat, coherence, quantum Fisher information, and quantum speed of evolution, we examined three quant…

Probing Purely Inelastic Scalar Dark Matter Across Colliders and Gravitational Wave Observatories
Jinhui Guo, Jia Liu, Chenhao Peng, Xiao-Ping Wang
https://arxiv.org/abs/2508.13276

Probing Purely Inelastic Scalar Dark Matter Across Colliders and Gravitational Wave Observatories
We propose and study a purely inelastic scalar dark matter model, where two real scalars-dark matter $ϕ_1$ and its excited partner $ϕ_2$ interact with the Standard Model via a Higgs portal. After mass diagonalization, only inelastic couplings remain, allowing the model to evade stringent bounds from direct detection. We show that thermal (co-)annihilation between $ϕ_1$ and $ϕ_2$ naturally yields the observed dark matter relic abundance. The same interaction structure can induce a strongly f…

Two-sided NED black-hole, naked-singularity, and soliton solutions
Mustapha Azreg-A\"inou
https://arxiv.org/abs/2506.18080 https://

Two-sided NED black-hole, naked-singularity, and soliton solutions
We consider non-linear electrodynamics (NED) minimally coupled to general relativity. We derive novel electrically charged, spherically symmetric, black-hole solutions having, for some set of parameters, all their NED fields (the electric field and the square of the electromagnetic field) regular for all values of the radial coordinate. For another set of parameters, the NED fields and the Kretschmann scalar are regular as the radial coordinate runs from one spatial infinity to another spatial …

Generic EFT-motivated beyond General Relativity gravitational wave tests and their curvature dependence: from observation to interpretation
Laura Bernard, Suvendu Giri, Luis Lehner, Riccardo Sturani
https://arxiv.org/abs/2507.17143

Generic EFT-motivated beyond General Relativity gravitational wave tests and their curvature dependence: from observation to interpretation
We present a "dictionary" to expedite the identification of potential deviations in gravitational waveforms from those predicted by General Relativity (GR) during the inspiral phase of black hole binaries. Assuming deviations from GR can be described by a local Effective Field Theory (EFT) formulated in terms of curvature operators (and possibly additional scalar fields), this dictionary characterizes how deviations scale with the masses of the binary components and identifies the leading order…

Generalized Neumann boundary condition for the scalar field
J. C. Fernandes, J. P. Ferreira, F. E. Barone, F. A. Barone, G. Flores-Hidalgo, L. H. C. Borges
https://arxiv.org/abs/2508.11083

Generalized Neumann boundary condition for the scalar field
In this paper, we explore the Klein-Gordon field theory in $(D+1)$ dimensions in the presence of a $(D-1)$-dimensional hyperplanar $δ$-like potential that couples quadratically to the field derivatives. This model effectively generalizes the Neumann boundary condition for the scalar field on the plane, as it reduces to this condition in an appropriate limit of the coupling parameter. Specifically, we calculate the modifications to the Feynman propagator induced by the planar potential and anal…

Multi-top signals of vectorlike quarks at the LHC
Elias Bernreuther, Bogdan A. Dobrescu
https://arxiv.org/abs/2508.14960 https://arxiv.org/pdf/2508.14960…

Multi-top signals of vectorlike quarks at the LHC
We point out that events with 6 or more top quarks may be observed at the LHC if certain particles exist at the TeV scale. In a model where a vectorlike quark of charge 2/3 decays into a top quark and a pseudoscalar particle, which subsequently decays into a top-antitop pair, the LHC production cross section for events with 6 top quarks may be above 10 fb. If the pseudoscalar is part of a complex scalar field, then longer cascade decays, involving the scalar partner, may lead to events with 8 o…

Effects of non-minimal scalar field couplings with curvature tensors on perturbations in non-commutative Schwarzschild spacetimes
Majid Karimabadi, Davood Mahdavian Yekta, S. A. Alavi
https://arxiv.org/abs/2508.13820

Effects of non-minimal scalar field couplings with curvature tensors on perturbations in non-commutative Schwarzschild spacetimes
This work presents a comparative analysis of the quasi-normal modes (QNMs) of scalar field perturbations in the non-commutative Schwarzschild black hole spacetime, focusing on two different non-minimal curvature couplings: in the first case the scalar field is coupled to the Ricciscalar while in the second the field's derivatives are coupled to the Einstein tensor. These couplings are important in the cosmological modified gravity models and low energy effects of perturbative quantum gravity. I…

Multi-loop spectra in general scalar EFTs and CFTs
Johan Henriksson, Franz Herzog, Stefanos R. Kousvos, Jasper Roosmale Nepveu
https://arxiv.org/abs/2507.12518

Multi-loop spectra in general scalar EFTs and CFTs
We consider the most general effective field theory (EFT) Lagrangian with scalar fields and derivatives, and renormalise it to substantially higher loop order than existing results in the literature. EFT Lagrangians have phenomenological applications, for example by encoding corrections to the Standard Model from unknown new physics. At the same time, scalar EFTs capture the spectrum of Wilson--Fisher conformal field theories (CFTs) in $4-\varepsilon$ dimensions. Our results are enabled by a mo…

Scalar induced gravitational waves in PV symmetric teleparallel gravity with non-minimally coupled boundary term
Fengge Zhang
https://arxiv.org/abs/2508.14584 https://

Scalar induced gravitational waves in PV symmetric teleparallel gravity with non-minimally coupled boundary term
The question of whether the parity violation occurs in gravitational interaction has recently attracted much attention. In this paper, we investigate the scalar induced gravitational waves (SIGWs) in symmetric teleparallel gravity incorporating a parity-violating (PV) term and a non-minimally coupled boundary term. The presence of this non-minimally coupled boundary term help to avoid the strong coupling problem inherent in PV symmetric teleparallel gravity, thereby enabling our study of the SI…

Quasinormal Modes of a Massive Scalar Field in Slowly Rotating Einstein-Bumblebee Black Holes
Weike Deng, Wentao Liu, Fen Long, Kui Xiao, Jiliang Jing
https://arxiv.org/abs/2507.13978

Quasinormal Modes of a Massive Scalar Field in Slowly Rotating Einstein-Bumblebee Black Holes
In this study, we examine the impacts of black hole spin, Lorentz-violating parameter, and the scalar field's mass on quasinormal modes (QNMs) of rotating Einstein-Bumblebee black holes, including computations up to the second-order expansion in rotation parameters. We investigate two classes of Lorentz-violating rotating black holes: one constructed via the Newman-Janis algorithm and the other obtained by solving the field equations through a series expansion. Within the slow-rotation approxim…

Generation of Axions and Axion-Like Particles through Mass Parametric Resonance induced by Scalar Perturbations in the Early Universe
Ruifeng Zheng, Puxian Wei, Qiaoli Yang
https://arxiv.org/abs/2507.13127

Generation of Axions and Axion-Like Particles through Mass Parametric Resonance induced by Scalar Perturbations in the Early Universe
Axions and axion-like particles can be generated in the early universe through misalignment production, thermal processes, the decay of topological defects, etc. In this paper, we show that scalar perturbations in the early universe could produce a significant amount of these particles primarily through mass parametric resonance effects. Scalar perturbations induce temperature fluctuations during the particle mass transition era, e.g. during the QCD phase transition. These temperature fluctuati…

Natural Ultralight Dark Matter: The Quadratic Twin
C\'edric Delaunay, Michael Geller, Zamir Heller-Algazi, Gilad Perez, Konstantin Springmann
https://arxiv.org/abs/2507.12514 …

Natural Ultralight Dark Matter: The Quadratic Twin
Scalar ultralight dark matter (ULDM) is uniquely accessible to tabletop experiments such as clocks and interferometers, and its search has been the focus of a vast experimental effort. However, the scalar ULDM mass is not protected from radiative corrections, and the entirety of the parameter space within reach of experiments suffers from a severe naturalness problem. In this paper, we propose a new twin mechanism that protects the mass of the scalar ULDM. Our scalar ULDM is a pseudo-Nambu-Gold…

Exploring the dynamics of coincident f(Q) gravity in the presence of DBI-essence scalar field
Ratul Mandal, Ujjal Debnath, Anirudh Pradhan
https://arxiv.org/abs/2507.13406

Exploring the dynamics of coincident f(Q) gravity in the presence of DBI-essence scalar field
In theoretical cosmology, symmetric teleparallel gravity or $f(Q)$ gravity based on nonmetricity tensor Q has become an interesting alternative to General relativity in recent years. The present research paper contains a rigorous dynamical system analysis of coincident f (Q) gravity in the presence of a generalized DBI essence scalar field. We have considered two different models of coincident f(Q) gravity, such as power law model $f(Q) = Q + nQ^m$ and exponential model $f(Q) = Q e^{\frac{βQ_0…

TeV-scale scalar leptoquarks motivated by B anomalies improve Yukawa unification in SO(10) GUT
Xiyuan Gao, Ulrich Nierste
https://arxiv.org/abs/2508.11745 https://

TeV-scale scalar leptoquarks motivated by B anomalies improve Yukawa unification in SO(10) GUT
It is common practice to explain deviations between data and Standard-Model predictions by postulating new particles at the TeV scale ad-hoc. This approach becomes much more convincing, if one successfully embeds the postulated particles into a UV completion which addresses other conceptual or phenomenological shortcomings of the SM. We present a study of an SO(10) grand unified theory which contains scalar leptoquark fields employed to explain the ``flavour anomalies'' in $b\rightarrow s$ and …

Charged Scalar Field at Future Null Infinity via Nonlinear Hyperboloidal Evolution
Jo\~ao D. \'Alvares, Alex Va\~no-Vin\~uales
https://arxiv.org/abs/2506.15311

Charged Scalar Field at Future Null Infinity via Nonlinear Hyperboloidal Evolution
Quasinormal modes and power-law late-time decay tails of a charged scalar field in a charged black hole background have been studied, but never in the fully non-linear regime, as far as we know. In this paper, we study the dependence of these properties on the charges of scalar field and black hole. For the quasinormal modes, a fit of the spherical fundamental mode is shown for the purely uncharged case and compared to the charged one. We also see for the first time the transition from gravitat…

Axion contribution to the mass-radius relation of neutron stars
Momchil Naydenov, Alberto Salvio
https://arxiv.org/abs/2506.16932 https://

Axion contribution to the mass-radius relation of neutron stars
A phenomenological Lagrangian for the interaction between a pseudo-scalar (axion-like) field and massive fermions is considered. At high density and non-zero temperature axions can be produced thermally through bremsstrahlung. We compute the equation of state for a static spherical cold compact object and investigate the numerical solutions of the Tolman-Oppenheimer-Volkoff equations. Causality of the obtained solutions sets a strict limitation on the possible values for the interaction constan…

Discriminating scalar ultralight dark matter from quasi-monochromatic gravitational waves in LISA
Jordan Gu\'e, Peter Wolf, Aur\'elien Hees
https://arxiv.org/abs/2508.13847

Discriminating scalar ultralight dark matter from quasi-monochromatic gravitational waves in LISA
A scalar ultralight dark matter (ULDM) candidate would induce oscillatory motion of freely falling test masses via its coupling to Standard Model fields. Such oscillations would create an observable Doppler shift of light exchanged between the test masses, and in particular would be visible in space-based gravitational waves (GW) detectors, such as LISA. While this kind of detection has been proposed multiple times in the recent years, we numerically investigate if it is possible to extract a s…

A covariant scalar-field framework for singularity resolution and dark energy
Martin Drobczyk
https://arxiv.org/abs/2506.12464 https://

A covariant scalar-field framework for singularity resolution and dark energy
We present a covariant scalar-field framework that unifies the space-time singularity resolution with dynamic dark energy. The theory extends general relativity by introducing a scalar field $Φ$ whose potential couples to the Lorentz-invariant quantity $X \equiv u_α u_β T^{αβ}_{\mathrm{matter}}$, ensuring manifest covariance. The resulting density-responsive scalar energy $ρ_Φ$ exhibits dual behavior: (i) in high-density regimes, it saturates at $ρ_Φ\leq AM_P^4/2$, providing a Planck-s…

A new parametric observational study of $f(Q,B)$ gravity with modified chaplygin gas
Amit Samaddar, S. Surendra Singh
https://arxiv.org/abs/2507.14251 http…

A new parametric observational study of $f(Q,B)$ gravity with modified chaplygin gas
In this work, we explore the cosmological dynamics of a modified gravity framework based on the function $f(Q,B)=δQ^{2}+βB$, where $Q$ denotes the nonmetricity scalar and $B$ is the boundary term that relates $Q$ to the Ricci scalar. The matter sector is modeled using the Modified Chaplygin Gas (MCG) with the equation of state $p=Aρ-\frac{B}{ρ^α}$, allowing the model to interpolate between early-time matter behavior and late-time cosmic acceleration. By deriving an analytical expression fo…

Quantum-corrected three-dimensional AdS space-time
Jacob C. Thompson, Elizabeth Winstanley
https://arxiv.org/abs/2508.14697 https://arxiv.org/pdf/2508.1469…

Quantum-corrected three-dimensional AdS space-time
We study the backreaction of a quantum scalar field on anti-de Sitter (AdS) space-time. The renormalized expectation value of the stress-energy tensor operator (RSET) for a quantum scalar field acts as a source term on the right-hand-side of the Einstein equations for the quantum-corrected metric. We find the RSET for a nonrotating thermal state on global AdS in three dimensions and compare this with results from relativistic kinetic theory. We then solve the linearized quantum-corrected Einste…

Cosmological effect of coherent oscillation of ultralight scalar fields in a multicomponent universe
Priyanka Saha, Dipanjan Dey, Kaushik Bhattacharya
https://arxiv.org/abs/2506.12863

Cosmological effect of coherent oscillation of ultralight scalar fields in a multicomponent universe
The idea that coherent oscillations of a scalar field, oscillating over a time period that is much shorter than the cosmological timescale, can exhibit cold dark matter (CDM) like behavior was previously established. In our work we first show that this equivalence between the oscillating scalar field model and the CDM sector is exact only in a flat Friedmann-Lemaitre-Robertson-Walker (FLRW) spacetime in the absence of cosmological constant and any other possible matter components in the univers…