Tootfinder

Impact of a complex scalar spectator field on baryon asymmetry within spontaneous baryogenesis
Mattia Dubbini, Orlando Luongo, Marco Muccino
https://arxiv.org/abs/2507.01112

Impact of a complex scalar spectator field on baryon asymmetry within spontaneous baryogenesis
We extend the framework of spontaneous baryogenesis by investigating the generation of baryon asymmetry when the inflaton, $θ$, is minimally coupled with a complex spectator scalar field $ϕ$, as $θ^2|ϕ|^2$. To do so, we also consider $ϕ$ non-minimally coupled with the Ricci scalar curvature $R$ through a Yukawa-like interaction. We do not consider further interactions of the spectator field with the fermions of the Standard Model, considering it \emph{de facto} as a dark scalar f…

Dynamical dark energy in the no-scale Brans-Dicke gravity
Muzi Hong, Kyohei Mukaida, Tsutomu T. Yanagida
https://arxiv.org/abs/2506.01543 https://

Dynamical dark energy in the no-scale Brans-Dicke gravity
We add a new scalar field in the no-scale Brans-Dicke gravity and require it to have a global O(2) symmetry with the original scalar field in the Brans-Dicke gravity. This gives us a new massless scalar field in the Einstein frame due to the SO(2) symmetry. We then explicitly break the O(2) symmetry to a $D_4$ symmetry, and this scalar field gains a periodic potential. This scalar field can serve as the quintessence field to explain dark energy. If we further add the $R^2$ term and the non-mini…

Relativistic Deformation of Geometry through Function C(v): Scalar Deformation Flow and the Geometric Classification of 3-Manifolds
Anton Alexa
https://arxiv.org/abs/2506.01146

Relativistic Deformation of Geometry through Function C(v): Scalar Deformation Flow and the Geometric Classification of 3-Manifolds
We introduce the scalar deformation function C(v), which captures how local geometric structures respond to motion at velocity v. This function exhibits smooth analytic behavior and defines a critical velocity vc beyond which the geometry compresses. Extending C(v) into a flow C(v, tau), we construct a scalar analogue of Ricci flow that governs the evolution of geometric configurations toward symmetric, stable states without singularities. The flow is derived from a variational energy functiona…

This https://arxiv.org/abs/2411.04619 has been replaced.
initial toot: https://mastoxiv.page/@ar…

Shear-induced force and dispersion due to buoyancy in a horizontal Hele-Shaw cell
This paper investigates shear flow in a Hele-Shaw cell, driven by varying horizontal buoyancy forces resulting from a horizontal density gradient induced by a scalar field. By employing asymptotic methods and taking the dependence of density and transport coefficients on the scalar field into account, effective two-dimensional hydrodynamic equations coupled with the scalar conservation equation are derived. These equations determine an effective diffusion coefficient for the scalar field accoun…

Janus correlators and Heun's equation
Michael Gutperle, Christina Yeo
https://arxiv.org/abs/2506.01766 https://arxiv.org/pdf/2506…

Janus correlators and Heun's equation
In this paper we calculate two-point correlation functions of a massive probe scalar field in the background of the three-dimensional Janus solution. We relate the equation of motion of the scalar to Heun's equation and use the recently obtained expressions for the connection coefficients to obtain the two-point function of operators dual to the probe scalar. From the correlators we obtain the corrections to the spectrum of boundary operators and bulk-boundary operator product coefficients to s…

Nonautonomous scalar concave-convex differential equations: conditions for uniform stability or bistability in a model of optical fluorescence
Jes\'us Due\~nas, Carmen N\'u\~nez, Rafael Obaya
https://arxiv.org/abs/2507.00545

Nonautonomous scalar concave-convex differential equations: conditions for uniform stability or bistability in a model of optical fluorescence
The long-term dynamics of a Bonifacio-Lugiato model of optical superfluorescence is investigated. The scalar ordinary differential equation modelling the phenomenon is given by a concave-convex autonomous function of the state variable that is excited by a time-dependent input, $I(t)$. The system's response is described in terms of the dynamical characteristics of the input function, with particular focus on uniform stability or bistability cases. Building on previous published results, the ope…

This https://arxiv.org/abs/2301.10980 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csIT_…

Beyond scalar quasi-arithmetic means: Quasi-arithmetic averages and quasi-arithmetic mixtures in information geometry
We generalize quasi-arithmetic means beyond scalars by considering the gradient map of a Legendre type real-valued function. The gradient map of a Legendre type function is proven strictly comonotone with a global inverse. It thus yields a generalization of strictly mononotone and differentiable functions generating scalar quasi-arithmetic means. Furthermore, the Legendre transformation gives rise to pairs of dual quasi-arithmetic averages via the convex duality. We study the invariance and equ…

This https://arxiv.org/abs/2502.16888 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_sta…

Functional BART with Shape Priors: A Bayesian Tree Approach to Constrained Functional Regression
Motivated by the remarkable success of Bayesian additive regression trees (BART) in regression modelling, we propose a novel nonparametric Bayesian method, termed Functional BART (FBART), tailored specifically for function-on-scalar regression. FBART leverages spline-based representations for functional responses coupled with a flexible tree-based partitioning structure, effectively capturing complex and heterogeneous relationships between response curves and scalar predictors. To facilitate ef…

Analyzing Time-Varying Scalar Fields using Piecewise-Linear Morse-Cerf Theory
Amritendu Dhar, Apratim Chakraborty, Vijay Natarajan
https://arxiv.org/abs/2507.00725

Analyzing Time-Varying Scalar Fields using Piecewise-Linear Morse-Cerf Theory
Morse-Cerf theory considers a one-parameter family of smooth functions defined on a manifold and studies the evolution of their critical points with the parameter. This paper presents an adaptation of Morse-Cerf theory to a family of piecewise-linear (PL) functions. The vertex diagram and Cerf diagram are introduced as representations of the evolution of critical points of the PL function. The characterization of a crossing in the vertex diagram based on the homology of the lower links of verti…

A scalar-mean curvature comparison theorem for manifolds with iterated conical singularities
Milan Jovanovic, Jinmin Wang
https://arxiv.org/abs/2506.24059 …

A scalar-mean curvature comparison theorem for manifolds with iterated conical singularities
We use the Dirac operator method to prove a scalar-mean curvature comparison theorem for spin manifolds which carry iterated conical singularities. Our approach is to study the index theory of a twisted Dirac operator on such singular manifolds. A dichotomy argument is used to prove the comparison theorem without knowing precisely the index of the twisted Dirac operator. This framework also enables us to prove a rigidity theorem of Euclidean domains and a spin positive mass theorem for asymptot…

Search for the nonresonant and resonant production of a Higgs boson in association with an additional scalar boson in the $\gamma\gamma\tau\tau$ final state in proton-proton collisions at $\sqrt{s}$ = 13 TeV
CMS Collaboration
https://arxiv.org/abs/2506.23012

Search for the nonresonant and resonant production of a Higgs boson in association with an additional scalar boson in the $γγττ$ final state in proton-proton collisions at $\sqrt{s}$ = 13 TeV
The results of a search for the production of two scalar bosons in final states with two photons and two tau leptons are presented. The search considers both nonresonant production of a Higgs boson pair, HH, and resonant production via a new boson X which decays either to HH or to H and a new scalar Y. The analysis uses up to 138 fb$^{-1}$ of proton-proton collision data, recorded between 2016 and 2018 by the CMS experiment at the LHC at a center-of-mass energy of 13 TeV. No evidence for signal…

This https://arxiv.org/abs/2412.05718 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csAI_…

RLZero: Direct Policy Inference from Language Without In-Domain Supervision
The reward hypothesis states that all goals and purposes can be understood as the maximization of a received scalar reward signal. However, in practice, defining such a reward signal is notoriously difficult, as humans are often unable to predict the optimal behavior corresponding to a reward function. Natural language offers an intuitive alternative for instructing reinforcement learning (RL) agents, yet previous language-conditioned approaches either require costly supervision or test-time tr…

This https://arxiv.org/abs/2407.17567 has been replaced.
initial toot: https://mastoxiv.page/@a…

Fermion-Vortex Interactions in Axion Electrodynamics
A relativistic action for scalar condensate-fermion mixture is considered where both the scalar boson and the fermion fields are coupled to a $U(1)$ gauge field. The dynamics of the gauge field is governed by a linear combination of the Maxwell term, and the Lorentz invariant $\mathbf{E\cdot B}$ term with a constant coefficient $θ$. We obtain an effective action describing an emergent fermion-fermion interaction and fermion-vortex tube interaction by using the particle-string duality, and find…

Investigating the leptonic couplings of doubly charged scalars at the muon collider
Nivedita Ghosh, Santosh Kumar Rai, Tousik Samui, Agnivo Sarkar
https://arxiv.org/abs/2506.00966

Investigating the leptonic couplings of doubly charged scalars at the muon collider
We study the lepton flavour conserving and violating couplings of a doubly charged scalar at a 3 TeV muon collider. Using a model independent Lagrangian, we analyse the electron electron, muon muon, and tau tau final states mediated by the doubly charged scalar to probe individual couplings to mu e, mu mu, and mu tau. We find that for a doubly charged scalar of mass greater than 1 TeV and order one couplings, we achieve high signal significance in these channels. We delineate the collider s sen…

Generation and Coherent Control of Dark-State Spatial Modes
Huai-Che Shia, Siang-Wei Shao, Wu-Cheng Chiang, Yu-Hung Kuan, I-Kang Liu, Teodora Kirova, Gediminas Juzeli\=unas, Yu-Ju Lin, Wen-Te Liao
https://arxiv.org/abs/2507.00558

Generation and Coherent Control of Dark-State Spatial Modes
The generation and dynamic control of the spatial mode of the dark-state polarization using electromagnetically induced transparency are theoretically investigated. We demonstrate that a combination of synthetic scalar and vector potentials can be employed to engineer discrete spatial modes of the dark state polariton, enabling quantum interference among these modes. We verify this concept by showing the Rabi oscillation between two spatial modes and stimulated Raman adiabatic passage among $Λ…

Approximation of Dirac operators with $\boldsymbol{\delta}$-shell potentials in the norm resolvent sense, II. Quantitative results
Jussi Behrndt, Markus Holzmann, Christian Stelzer-Landauer
https://arxiv.org/abs/2507.01482

Approximation of Dirac operators with $\boldsymbolδ$-shell potentials in the norm resolvent sense, II. Quantitative results
This paper is devoted to the approximation of two and three-dimensional Dirac operators $H_{\widetilde{V} δ_Σ}$ with combinations of electrostatic and Lorentz scalar $δ$-shell interactions in the norm resolvent sense. Relying on results from \cite{BHS23} an explicit smallness condition on the coupling parameters is derived so that $H_{\widetilde{V} δ_Σ}$ is the limit of Dirac operators with scaled electrostatic and Lorentz scalar potentials. Via counterexamples it is shown that this condit…

This https://arxiv.org/abs/2311.05688 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

Resurgence in the Scalar Quantum Electrodynamics Euler-Heisenberg Lagrangian
We explore the ideas of resurgence and Padé-Borel resummation in the Euler-Heisenberg Lagrangian of scalar quantum electrodynamics, which has remained largely unexamined in these contexts. We thereby extend the related seminal works in spinor quantum electrodynamics, while contrasting the similarities and differences in the two cases. We investigate in detail the efficacy of resurgent extrapolations starting from just a finite number of terms in the weak-field expansions of the 1-loop and 2-lo…

This https://arxiv.org/abs/2401.09337 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Gravity Coupled with Scalar, SU$(n)$, and Spinor Fields on Manifolds with Null-Boundary
In this paper, we present a theory for gravity coupled with scalar, SU$(n)$ and spinor fields on manifolds with null-boundary. We perform the symplectic reduction of the space of boundary fields and give the constraints of the theory in terms of local functionals of boundary vielbein and connection. For the three different couplings, the analysis of the constraint algebra shows that the set of constraints does not form a first class system.

This https://arxiv.org/abs/2501.02772 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csIR_…

GeAR: Generation Augmented Retrieval
Document retrieval techniques are essential for developing large-scale information systems. The common approach involves using a bi-encoder to compute the semantic similarity between a query and documents. However, the scalar similarity often fail to reflect enough information, hindering the interpretation of retrieval results. In addition, this process primarily focuses on global semantics, overlooking the finer-grained semantic relationships between the query and the document's content. In th…

Khronon-Tensor theory reproducing MOND and the cosmological model
Luc Blanchet, Constantinos Skordis
https://arxiv.org/abs/2507.00912 https://

Khronon-Tensor theory reproducing MOND and the cosmological model
We propose an alternative scalar-tensor theory based on the Khronon scalar field labeling a family of space-like three-dimensional hypersurfaces. This theory leads to modified Newtonian dynamics (MOND) at galactic scales for stationary systems, recovers GR plus a cosmological constant in the strong field regime, and is in agreement with the standard cosmological model and the observed cosmic microwave background anisotropies.

A hyperboloidal method for numerical simulations of multidimensional nonlinear wave equations
Oliver Rinne
https://arxiv.org/abs/2507.00674 https://…

A hyperboloidal method for numerical simulations of multidimensional nonlinear wave equations
We consider the scalar wave equation with power nonlinearity in n+1 dimensions. Unlike previous numerical studies, we go beyond the radial case and do not assume any symmetries for n=3, and we only impose an SO(n-1) symmetry in higher dimensions. Our method is based on a hyperboloidal foliation of Minkowski spacetime and conformal compactification. We focus on the late-time power-law decay (tails) of the solutions and compute decay exponents for different spherical harmonic modes, for subcritic…

Implications of Yukawa interactions in scalar sector
Muhammad Saad, Tajdar Mufti
https://arxiv.org/abs/2506.23390 https://arxiv.org/p…

Implications of Yukawa interactions in scalar sector
In this work, a field theory model containing a real scalar singlet and an SU(2) symmetry preserving complex doublet is studied using the method of lattice simulations. The model considers all quartic vertices along with the Yukawa vertex between a real scalar singlet and an SU(2) symmetry preserving complex doublet field. Machine learning is used to extract representative functions of the field propagators, lattice regulator, and the Yukawa vertex. In the considered renormalization scheme the …

This https://arxiv.org/abs/2501.06957 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Dispersive estimates for Schrödinger's and wave equations on Riemannian manifolds
This paper proves $L^p$ decay estimates for Schrödinger's and wave equations with scalar potentials on three-dimensional Riemannian manifolds. The main result regards small perturbations of a metric with constant negative sectional curvature. We also prove estimates on $\mathbb S^3$, the three-dimensional sphere, and $\mathbb H^3$, the three-dimensional hyperbolic space. Most of the estimates hold for the perturbed Hamiltonian $H=H_0+V$, where $H_0$ is the shifted Laplacian $H_0=-Δ+κ_0$,…

This https://arxiv.org/abs/2209.03243 has been replaced.
link: https://scholar.google.com/scholar?q=a

Adapted Wasserstein distance between the laws of SDEs
We consider the bicausal optimal transport problem between the laws of scalar time-homogeneous stochastic differential equations, and we establish the optimality of the synchronous coupling between these laws. The proof of this result is based on time-discretisation and reveals a novel connection between the synchronous coupling and the celebrated discrete-time Knothe--Rosenblatt rearrangement. We also prove a result on equality of topologies restricted to a certain subset of laws of continuous…

Conformal scalar field theory from Ising tricriticality on the fuzzy sphere
Joseph Taylor, Cristian Voinea, Zlatko Papi\'c, Ruihua Fan
https://arxiv.org/abs/2506.22539

Conformal scalar field theory from Ising tricriticality on the fuzzy sphere
Free theories are landmarks in the landscape of quantum field theories: their exact solvability serves as a pillar for perturbative constructions of interacting theories. Fuzzy sphere regularization, which combines quantum Hall physics with state-operator correspondence, has recently been proposed as a promising framework for simulating three-dimensional conformal field theories (CFTs), but so far it has not provided access to free theories. We overcome this limitation by designing a bilayer qu…

Quantum Gravity Corrections to the Scalar Quasi-Normal Modes in Near-Extremal Reissener-Nordstr\"{o}m Black Holes
Zheng Jiang, Jun Nian, Caiying Shao, Yu Tian, Hongbao Zhang
https://arxiv.org/abs/2506.22945

Quantum Gravity Corrections to the Scalar Quasi-Normal Modes in Near-Extremal Reissener-Nordström Black Holes
We investigate quantum corrections to scalar quasi-normal modes (QNMs) in the near-extremal Reissner-Nordström black hole background with quantum correction in the near-horizon AdS$_2\times \mathrm{S}^2$ region. By performing a dimensional reduction, we obtain an effective Jackiw-Teitelboim (JT) gravity theory, whose quantum fluctuations are captured by the Schwarzian action. Using path integral techniques, we derive the quantum-corrected scalar field equation, which modifies the effective pot…

This https://arxiv.org/abs/2501.14087 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hepp…

On the scalar sector of 2HDM: ring of basis invariants, syzygies, and six-loop renormalization-group equations
We consider a generating set of reparametrization invariants that can be constructed from the couplings and masses entering the scalar potential of the general Two-Higgs-Doublet Model (2HDM). Being independent of higgs-basis rotations, they generate a polynomial ring of basis invariants that represent the physical content of the model. Ignoring for the moment gauge and Yukawa interactions, we derive six-loop renormalization group equations (RGE) for all the invariants entering the set. We do no…

This https://arxiv.org/abs/2502.20923 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_grqc_…

Spinning boson stars in nonlinear sigma models and Universal Relations
Boson stars are hypothetical compact objects derived from solutions of a self-gravitating complex scalar field. In this study, we extend the traditional models by generalizing the kinetic term of the scalar field to that of a nonlinear sigma model. Concretely, we obtain spinning boson star solutions for a family of models parametrized by the curvature of their two-dimensional target manifold, as well as for various self-interaction potentials. We derive the global properties and multipolar stru…

The principle of least action for random graphs
Ioannis Kleftogiannis, Ilias Amanatidis
https://arxiv.org/abs/2507.01468 https://arxi…

The principle of least action for random graphs
We study the statistical properties of the physical action $S$ for random graphs, by treating the number of neighbors at each vertex of the graph (degree), as a scalar field. For each configuration (run) of the graph we calculate the Lagrangian of the degree field by using a lattice quantum field theory(LQFT) approach. Then the corresponding action is calculated by integrating the Lagrangian over all the vertices of the graph. We implement an evolution mechanism for the graph by removing one ed…

Entanglement on a Sphere
Konstantinos Boutivas, Dimitrios Katsinis, Georgios Pastras, Nikolaos Prountzos, Nikolaos Tetradis
https://arxiv.org/abs/2507.01174

Entanglement on a Sphere
We study the entanglement entropy of a massive scalar field in the background of the Einstein universe. We determine numerically the structure of the UV-divergent terms. We study analytically the IR term that originates in the long-range correlations arising from the field zero mode on the sphere. We compare with previous results for a scalar field in a dS or AdS background.

On the distribution of shapes of pure quartic number fields
Sudipa Das, Sushant Kala, Arunabha Mukhopadhyay, Anwesh Ray
https://arxiv.org/abs/2506.23766 ht…

On the distribution of shapes of pure quartic number fields
The shape of a number field is a subtle arithmetic invariant arising from the geometry of numbers. It is defined as the equivalence class of the lattice of integers with respect to linear operations that are composites of rotations, reflections, and positive scalar dilations. For a number field of degree $n$, the shape is a point in the space of shapes $\mathscr{S}_{n-1}$, which is the double quotient $GL_{n-1}(\mathbb{Z}) \backslash GL_{n-1}(\mathbb{R}) / GO_{n-1}(\mathbb{R})$. In this paper, …

Factorization of positive definite kernels. Correspondences: $C^{*}$-algebraic and operator valued context vs scalar valued kernels
Palle E. T. Jorgensen, James Tian
https://arxiv.org/abs/2505.21037

Factorization of positive definite kernels. Correspondences: $C^{*}$-algebraic and operator valued context vs scalar valued kernels
We introduce and study a class $\mathcal{M}$ of generalized positive definite kernels of the form $K\colon X\times X\to L(\mathfrak{A},L(H))$, where $\mathfrak{A}$ is a unital $C^{*}$-algebra and $H$ a Hilbert space. These kernels encode operator-valued correlations governed by the algebraic structure of $\mathfrak{A}$, and generalize classical scalar-valued positive definite kernels, completely positive (CP) maps, and states on $C^{*}$-algebras. Our approach is based on a scalar-valued kernel …

Emergent symmetry in a two-Higgs-doublet model from quantum information and magic
Giorgio Busoni, John Gargalionis, Ewan N. V. Wallace, Martin J. White
https://arxiv.org/abs/2506.01314

Emergent symmetry in a two-Higgs-doublet model from quantum information and magic
Studies of scattering processes in scalar models with two Higgs doublets have recently hinted at a connection between the absence of flavour-space entanglement in $Φ^+Φ^0$ scattering and an emergent $\mathrm{SO}(8)$ symmetry in the scalar potential. We extend the analysis to all scattering channels with two particles in the external states by treating the process as a four-qubit system in the weak isospin and flavour subspaces of the $2$-particle state. We work with a generic quantum informat…

A surface finite element scheme for a stochastic PDE on an evolving curve
Paola Pozzi, Bj\"orn Stinner
https://arxiv.org/abs/2507.01527 https://

A surface finite element scheme for a stochastic PDE on an evolving curve
In this paper we consider an ESFEM method for the advection and diffusion of a scalar quantity on a moving closed curve. The diffusion process is controlled by a forcing term that may include a rough term (specifically a stochastic noise) which in particular destroys the classical time differentiability properties of the solution. We provide a suitable variational solution concept and a fully discrete FEM discretization. Our error analysis appropriately generalizes classical estimates to this w…

The effect of droplet configurations within the Functional Renormalization Group of low-dimensional Ising models
Ivan Balog, Lucija Nora Farka\v{s}, Maroje Marohni\'c, Gilles Tarjus
https://arxiv.org/abs/2506.23415

The effect of droplet configurations within the Functional Renormalization Group of low-dimensional Ising models
We explore the application of the nonperturbative functional renormalization group (NPFRG) within its most common approximation scheme based on truncations of the derivative expansion to the $Z_2$-symmetric scalar $φ^4$ theory as the lower critical dimension $d_{\rm lc}$ is approached. We aim to assess whether the NPFRG - a broad, nonspecialized method which is accurate in $d\geq 2$ - can capture the effect of the localized (droplet) excitations that drive the disappearance of the phase transi…

Constraining self-interacting ultrahigh-energy neutrinos by cosmic microwave background spectral distortion
Pravin Kumar Natwariya, Shibsankar Si, Alekha C. Nayak, Tripurari Srivastava
https://arxiv.org/abs/2506.24110

Constraining self-interacting ultrahigh-energy neutrinos by cosmic microwave background spectral distortion
The neutrino telescopes have firmly established the existence of ultra-high-energy (UHE) neutrinos. Observations of these neutrinos offer a unique probe of neutrino self-interactions. This work investigates how the self-interacting neutrinos, mediated by scalar bosons, inject energy into the medium through radiative scattering with the cosmic neutrino background, leaving an imprint on the Cosmic Microwave Background (CMB) spectrum. The energy injection into plasma in redshift ranges, $5\times10…

A thermodynamical suspension model for blood
M. Gorgone, C. F. Munafo', A. Palumbo, P. Rogolino
https://arxiv.org/abs/2506.00067 https://

A thermodynamical suspension model for blood
A complete thermodynamical analysis for a blood model, based on mixture theory, is performed. The model is developed considering the blood as a suspension of red blood cells (solid component) in the plasma (fluid component), and taking into account the temperature effects. Furthermore, two independent scalar internal variables are introduced accounting for additional dissipative effects. Using Clausius-Duhem inequality, the general thermodynamic restrictions and residual dissipation inequality …

Twisted and coupled constant scalar curvature K\"{a}hler metrics on minimal ruled surfaces
Ramesh Mete
https://arxiv.org/abs/2505.23327 https://

Twisted and coupled constant scalar curvature Kähler metrics on minimal ruled surfaces
In this paper, we study the existence of twisted constant scalar curvature Kähler (cscK) metrics and non-existence of coupled cscK metrics on minimal ruled surfaces over a Riemann surface of genus $2$. Moreover, we give a bound for the Chen-Cheng invariant related to Chen's continuity path for cscK problem on these ruled surfaces.

From Initial Data to Boundary Layers: Neural Networks for Nonlinear Hyperbolic Conservation Laws
Igor Ciril, Khalil Haddaoui, Yohann Tendero
https://arxiv.org/abs/2506.01453

From Initial Data to Boundary Layers: Neural Networks for Nonlinear Hyperbolic Conservation Laws
We address the approximation of entropy solutions to initial-boundary value problems for nonlinear strictly hyperbolic conservation laws using neural networks. A general and systematic framework is introduced for the design of efficient and reliable learning algorithms, combining fast convergence during training with accurate predictions. The methodology is assessed through a series of one-dimensional scalar test cases, highlighting its potential applicability to more complex industrial scenari…

This https://arxiv.org/abs/2406.05694 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

A Low Rank Neural Representation of Entropy Solutions
We construct a new representation of entropy solutions to nonlinear scalar conservation laws with a smooth convex flux function in a single spatial dimension. The representation is a generalization of the method of characteristics and posseses a compositional form. While it is a nonlinear representation, the embedded dynamics of the solution in the time variable is linear. This representation is then discretized as a manifold of implicit neural representations where the feedforward neural netwo…

Replaced article(s) found for physics.flu-dyn. https://arxiv.org/list/physics.flu-dyn/new
[1/1]:
- Large-eddy simulation of turbulent spray flames: Effects of scalar correlation and enthalpy reduc...
Dong Wang, Min Zhang, Ruixin Yang, Zhi X. Chen

Unbounded knapsack problem and double partitions
Boris Y. Rubinstein
https://arxiv.org/abs/2506.23499 https://arxiv.org/pdf/2506.2349…

Unbounded knapsack problem and double partitions
The unbounded knapsack problem can be considered as a particular case of the double partition problem that asks for a number of nonnegative integer solutions to a system of two linear Diophantine equations with integer coefficients. In the middle of 19th century Sylvester and Cayley suggested an approach based on the variable elimination allowing a reduction of a double partition to a sum of scalar partitions. This manuscript discusses a geometric interpretation of this method and its applicati…

Cosmology with Distinct Functions $f$ of the Non-metricity Scalar $Q$ : A Dynamical System Approach
Promila Biswas, Subhajit Pal, Ritabrata Biswas, Satyajit Pal
https://arxiv.org/abs/2506.21646

Cosmology with Distinct Functions $f$ of the Non-metricity Scalar $Q$ : A Dynamical System Approach
Symmetric teleparallel gravity is one among the general relativistic trinity which deals with the non-metricity scalar $Q$. In the Einstein Hilbert action, a function of $Q$ is chosen to be the main contributory part of the Lagrangian and a modified theory of gravity is constructed. In literature, different structures of the function of $Q$ are found which sustain several astrophysical observations like Big Bang nucleosynthesis, late-time cosmic acceleration etc. Autonomous systems for each suc…

This https://arxiv.org/abs/2412.16527 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

Scalar-Tensor multiplet in four dimensional N=2 conformal supergravity
We study various N=2 multiplets in four dimensions by looking at the supersymmetric truncation of four dimensional N=3 multiplets. Under supersymmetric truncation, the off-shell N=3 Weyl multiplet reduces to the off-shell N=2 Weyl multiplet and the off-shell N=2 vector multiplet (which we will refer to as the central charge multiplet). Under the same truncation, the on-shell N=3 vector multiplet reduces to the on-shell N=2 vector multiplet and an on-shell massive hypermultiplet with a broken ri…

Geometric Convergence to an Extreme Limit Space with nonnegative scalar curvature
Christina Sormani, Wenchuan Tian, Wai-Ho Yeung
https://arxiv.org/abs/2506.12491

Geometric Convergence to an Extreme Limit Space with nonnegative scalar curvature
In 2014, Gromov conjectured that sequences of manifolds with nonnegative scalar curvature should have subsequences which converge in some geometric sense to limit spaces with some notion of generalized nonnegative scalar curvature. In recent joint work with Changliang Wang, the authors found a sequence of warped product Riemannian metrics on $\Sph^2\times \Sph^1$ with nonnegative scalar curvature whose metric tensors converge in the $W^{1,p}$ sense for $p<2$ to an extreme warped product limit s…

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. …

Approximation of Dirac operators with confining electrostatic and Lorentz scalar $\delta$-shell potentials
Christian Stelzer-Landauer
https://arxiv.org/abs/2505.22191

Approximation of Dirac operators with confining electrostatic and Lorentz scalar $δ$-shell potentials
In this paper we study the approximation of Dirac operators with $δ$-shell potentials in the norm resolvent sense. In particular, we consider the approximation of Dirac operators with confining electrostatic and Lorentz scalar $δ$-shell potentials, where the support of the $δ$-shell potentials is impermeable to particles modelled by such Dirac operators.

Connecting t-channel Dark Matter Models to the Standard Model Effective Field Theory
Simone Biondini, Lorenzo Tiberi, Orlando Panella
https://arxiv.org/abs/2507.00925

Connecting t-channel Dark Matter Models to the Standard Model Effective Field Theory
We investigate the connection between simplified dark matter models featuring a $t$-channel scalar mediator and the Standard Model Effective Field Theory (SMEFT). We focus on scenarios with fermionic dark matter interacting with leptons, under the assumption of Minimal Flavor Violation. The dimension-six SMEFT Wilson coefficients are computed in the Warsaw basis at one loop, with the aid of Matchete. Assuming a compressed mass spectrum for the dark matter and the mediator, we incorporate coanni…

This https://arxiv.org/abs/2310.03697 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_grqc_…

Onset of dark energy from cosmological scalarization and gravitational wave speed
This study investigates the emergence of dark energy during the matter-dominated era through spontaneous cosmological scalarization in the scalar-Ricci-Gauss-Bonnet model.Our model aligns with the conjecture that the speed of gravitational waves at low redshifts is nearly equal to the speed of light, implying that the Gauss-Bonnet invariant does not directly contribute to late-time acceleration and suggesting that scalarization begins in the radiation-dominated era. The Gauss-Bonnet coupl…

Uncertain Mode Surfaces in 3D Symmetric Second-Order Tensor Field Ensembles
Tim Gerrits
https://arxiv.org/abs/2506.23406 https://arxi…

Uncertain Mode Surfaces in 3D Symmetric Second-Order Tensor Field Ensembles
The analysis of 3D symmetric second-order tensor fields often relies on topological features such as degenerate tensor lines, neutral surfaces, and their generalization to mode surfaces, which reveal important structural insights into the data. However, uncertainty in such fields is typically visualized using derived scalar attributes or tensor glyph representations, which often fail to capture the global behavior. Recent advances have introduced uncertain topological features for tensor field …

Replaced article(s) found for hep-th. https://arxiv.org/list/hep-th/new
[2/2]:
- RG-stable parameter relations of a scalar field theory in absence of a symmetry
Howard E. Haber, P. M. Ferreira

New Constraints on Neutrino-Dark Matter Interactions: A Comprehensive Analysis
P. S. Bhupal Dev, Doojin Kim, Deepak Sathyan, Kuver Sinha, Yongchao Zhang
https://arxiv.org/abs/2507.01000

New Constraints on Neutrino-Dark Matter Interactions: A Comprehensive Analysis
We present a comprehensive analysis of the interactions of neutrinos with the dark sector within the simplified model framework. We first derive the exact analytic formulas for the differential scattering cross sections of neutrinos with scalar, fermion, and vector dark matter (DM) for light dark sector models with mediators of different types. We then implement the full catalog of constraints on the parameter space of the neutrino-DM and neutrino-mediator couplings and masses, including cosmol…

Requirements on bandpass resolution and measurement precision for LiteBIRD
S. Giardiello, A. Carones, T. Ghigna, L. Pagano, F. Piacentini, L. Montier, R. Takaku, E. Calabrese, D. Adak, E. Allys, A. Anand, J. Aumont, M. Ballardini, A. J. Banday, R. B. Barreiro, N. Bartolo, S. Basak, M. Bersanelli, A. Besnard, M. Bortolami, T. Brinckmann, F. J. Casas, K. Cheung, M. Citran, L. Clermont, F. Columbro, A. Coppolecchia, F. Cuttaia, P. de Bernardis, E. de la Hoz, M. De Lucia, S. Della Torre, E…

Requirements on bandpass resolution and measurement precision for LiteBIRD
In this work, we study the impact of an imperfect knowledge of the instrument bandpasses on the estimate of the tensor-to-scalar ratio $r$ in the context of the next-generation LiteBIRD satellite. We develop a pipeline to include bandpass integration in both the time-ordered data (TOD) and the map-making processing steps. We introduce the systematic effect by having a mismatch between the ``real'', high resolution bandpass $τ$, entering the TOD, and the estimated one $τ_s$, used in the map-ma…

This https://arxiv.org/abs/2503.10716 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_grqc_…

Warm Inflation in $f(Q)$ gravity
This paper investigates warm inflation within the context of $f(Q)$ gravity for the Friedmann-Robertson-Walker spacetime. We formulate the governing field equations using slow-roll approximations and examine a power-law model to evaluate critical inflationary parameters including slow-roll parameters, scalar and tensor power spectra, and their associated spectral indices. The distinguishing feature of warm inflation lies in its fundamental premise that both radiation and inflaton coexist and in…

This https://arxiv.org/abs/2505.07358 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

Two-point tree-level string amplitudes as AdS transition amplitudes
We compute the two-point open string and closed string amplitudes at tree level and show that, in a 't Hooft-like limit, they take a form structurally analogous to boundary-to-boundary transition amplitudes of a scalar field in Euclidean AdS space. Interestingly, while both amplitudes yield equivalent expressions, the associated 't Hooft couplings are defined by different worldsheet curvatures-geodesic for the disk and Gaussian for the sphere-suggesting a possible geometric aspect of open/close…

The Grothendieck duality and sparse minimizing in spaces of Sobolev solutions to elliptic systems
Alexander Shlapunov, Alexander Polkovnikov, Kseniya Gagelgans
https://arxiv.org/abs/2506.23087

The Grothendieck duality and sparse minimizing in spaces of Sobolev solutions to elliptic systems
We present an instructive example of using Banach spaces of solutions to (linear, generally, non-scalar) elliptic operator $A$ to investigate variational inverse problems related to neural networks and/or to regularization of solutions to boundary value problems. More precisely, inspired by kernel's method for optimization problems in locally convex spaces, we prove the existence of the so-called sparse minimizers for the related variational problem and produce a representer theorem where a sui…

Entanglement, Trace Anomaly and Confinement in QCD
Kiminad A. Mamo
https://arxiv.org/abs/2507.00176 https://arxiv.org/pdf/2507.00176

Entanglement, Trace Anomaly and Confinement in QCD
We formulate confinement in QCD as an entropic surface phenomenon. Quark and gluon quantum information is localized on a two-dimensional transverse sheet of radius $R_{\mathrm{EE}}$ where the von Neumann entropy of the vacuum attains its maximum. Lattice QCD determinations of scalar (trace) gravitational form factors fix both $R_{\mathrm{EE}}$ and the transverse trace-anomaly density $ρ_h(R_{\mathrm{EE}})$ with percent-level accuracy, enabling a parameter-free mechanical entropy $S_{\mathrm{EE…

Scale-resolved turbulent Prandtl number for Rayleigh-B\'{e}nard convection at $\boldsymbol{Pr =10^{-3}}$
Shashwat Bhattacharya, Dmitry Krasnov, Ambrish Pandey, Toshiyuki Gotoh, J\"org Schumacher
https://arxiv.org/abs/2506.22110

Scale-resolved turbulent Prandtl number for Rayleigh-Bénard convection at $\boldsymbol{Pr =10^{-3}}$
We present a framework to calculate the scale-resolved turbulent Prandtl number $Pr_t$ for the well-mixed and highly inertial bulk of a turbulent Rayleigh-Bénard mesoscale convection layer at a molecular Prandtl number $Pr=10^{-3}$. It builds on Kolmogorov's refined similarity hypothesis of homogeneous isotropic fluid and passive scalar turbulence, based on log-normally distributed amplitudes of kinetic energy and scalar dissipation rates that are coarse-grained over variable scales $r$ in the…

Quasinormal modes of nonlocal gravity black holes
Rocco D'Agostino, Vittorio De Falco
https://arxiv.org/abs/2507.01698 https://ar…

Quasinormal modes of nonlocal gravity black holes
We present a comprehensive study of the quasinormal modes of a new class of nonlocal static and spherically symmetric black hole (BH) solutions within the framework of the revised Deser-Woodard theory of gravity. These solutions are constructed as linear perturbations of the Schwarzschild spacetime and are characterized by an inverse power-law behavior of the lapse metric function. We derive the radial profiles of the effective potentials corresponding to scalar, electromagnetic and axial gravi…

This https://arxiv.org/abs/2505.20262 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

On world-sheet S-matrix of NSR string in static gauge
As was shown in arXiv:1203.1054, expanding the Nambu action near the "long string" vacuum in the static gauge one finds that the one-loop 2 to 2 scattering amplitude of the $D-2=24$ transverse 2d fluctuations $X^i$ is given by a pure phase expression consistent with underlying integrability. Similar computation in the Green-Schwarz superstring was carried out in arXiv:2404.09658. Here we consider the case of the NSR string starting with its manifestly 2d covariant action given by $D$ scalar mul…

Quaternionic-K\"ahler manifolds with nonnegative sectional curvature
S. Brendle, U. Semmelmann
https://arxiv.org/abs/2506.22181 https://

Quaternionic-Kähler manifolds with nonnegative sectional curvature
We show that a compact quaternionic-Kähler manifold with positive scalar curvature and nonnegative sectional curvature is isometric to a symmetric space. This extends a classical theorem of Berger.

Scalar Lattices and Probabilistic Shaping for Dithered Wyner-Ziv Quantization
Muhammed Yusuf Sener (Shitz), Gerhard Kramer (Shitz), Shlomo Shamai (Shitz), Wen Xu
https://arxiv.org/abs/2506.13162

Scalar Lattices and Probabilistic Shaping for Dithered Wyner-Ziv Quantization
Scalar lattice quantization with a modulo operator, dithering, and probabilistic shaping is applied to the Wyner-Ziv (WZ) problem with a Gaussian source and mean square error distortion. The method achieves the WZ rate-distortion pairs. The analysis is similar to that for dirty paper coding but requires additional steps to bound the distortion because the modulo shift is correlated with the source noise. The results extend to vector sources by reverse waterfilling on the spectrum of the covaria…

Spectral Geometry with Exceptional Symmetry and Charged Higgs Fields
Shane Farnsworth
https://arxiv.org/abs/2506.21496 https://arxiv.…

Spectral Geometry with Exceptional Symmetry and Charged Higgs Fields
We lay the foundations for a general approach to nonassociative spectral geometry as an extension of Connes' noncommutative geometry by explaining how to construct finite-dimensional, discrete spectral geometries with exceptional symmetry, and gauge covariant Dirac operators. We showcase an explicit construction of a geometry corresponding to the internal space of a $G_2\times G_2$ gauge theory with charged scalar content and scalar representations restricted by novel conditions arising from th…

Testing a 95 GeV Scalar at the CEPC with Machine Learning
Yabo Dong, Manqi Ruan, Kun Wang, Haijun Yang, Jingya Zhu
https://arxiv.org/abs/2506.21454 https:/…

Testing a 95 GeV Scalar at the CEPC with Machine Learning
Several possible excesses around $95\,$GeV hint at an additional light scalar beyond the Standard Model. We examine the capability of the CEPC to test this hypothesis in the Higgsstrahlung channel $e^{+}e^{-}\!\to ZS$ with $Z\!\toμ^{+}μ^{-}$ and $S\!\toτ^{+}τ^{-}$. Full detector simulation shows that the optimal center-of-mass energy to study the 95 GeV light scalar is 210 GeV. A deep neural network classifier reduces the luminosity required for discovery by half. At $L=500$ fb$^{-1}$, the …

Eisenhart-Duval lift, Nonlocal Conservation laws and Painlev\'{e} Analysis in Scalar field Cosmology
Andronikos Paliathanasis
https://arxiv.org/abs/2506.21435

Eisenhart-Duval lift, Nonlocal Conservation laws and Painlevé Analysis in Scalar field Cosmology
We investigate the existence of nonlocal conservation laws for the gravitational field equations of scalar field cosmology in an FLRW background with a dust fluid source. We perform such analysis by using a novel approach for the Eisenhart-Duval lift. It follows that the scalar field potential $V\left( ϕ\right) =α\left( e^{λϕ}+β\right) $ admits nontrivial conservation laws. Furthermore, we employ the Painlevé analysis to examine the integrability of the field equations. For the quintessen…

Exact coherent structures with dilute particle suspensions
Jake Langham, Andrew J. Hogg
https://arxiv.org/abs/2506.22622 https://arxi…

Exact coherent structures with dilute particle suspensions
The physics of settling suspensions under shear are investigated by theoretical and numerical analyses of unstable equilibrium solutions to the incompressible Navier-Stokes equations, coupled with an advection-diffusion-settling equation for a dilute phase of particles. Two cases are considered: the 'passive scalar' regime, in which the sediment is advected by the fluid motion, but concentrations are too dilute to affect the flow; and the 'stratified' regime, where nonuniform vertical distribut…

This https://arxiv.org/abs/2501.13210 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Primordial gravitational waves in DHOST inflation
We consider DHOST inflationary models with a shift symmetry leading to a de Sitter space-time at the background cosmological level. Deviations from scale invariance of the scalar and tensor perturbations follow from the breaking of the shift symmetry by quadratic and quartic operators. These models show a strong violation of the consistency relation of single-field inflationary models with a very flat spectrum of tensor perturbations. This opens up the prospects of future detection of primordia…

Relaxation enhancement by controlling incompressible fluid flows
Kai Koike, Vahagn Nersesyan, Manuel Rissel, Marius Tucsnak
https://arxiv.org/abs/2506.22233

Relaxation enhancement by controlling incompressible fluid flows
We propose a PDE-controllability based approach to the enhancement of diffusive mixing for passive scalar fields. Unlike in the existing literature, our relaxation enhancing fields are not prescribed $\textit{ab initio}$ at every time and at every point of the spatial domain. Instead, we prove that time-dependent relaxation enhancing vector fields can be obtained as $\textit{state trajectories of control systems described by the incompressible Euler equations}$ either driven by finite-dimension…

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…

Constraint on ultralight Nelson-Barr dark matter from time-dependent nuclear decay
Chang-Jie Dai, Tong Li
https://arxiv.org/abs/2506.22081 https://

Constraint on ultralight Nelson-Barr dark matter from time-dependent nuclear decay
Many experiments have notably reported anomalies in radioactive decay rates with periodic variations and challenged the traditional belief of time-independent decays. This periodicity could potentially be explained by the presence of a periodic dark matter (DM) candidate. In this work, we investigate the impact of time-dependent nuclear decay rates on the ultralight scalar DM in Nelson-Barr solution to the strong CP problem. The light scalar DM field in this framework induces periodic modulatio…

Black hole surrounded by perfect fluid dark matter with a background Kalb-Ramond field
Sohan Kumar Jha
https://arxiv.org/abs/2506.21911 https://

Black hole surrounded by perfect fluid dark matter with a background Kalb-Ramond field
With an intent to explore the interplay between the Lorentz symmetry breaking (LSB) and the presence of dark matter (DM), we obtain a static and spherically symmetric black hole (BH) solution in the background of nonminimally coupled Kalb-Ramond (KR) field surrounded by perfect fluid dark matter (PFDM). The KR field is frozen to a non-zero vacuum expectation value (VEV) that breaks the particle Lorentz symmetry spontaneously. We explore scalar invariants, Ricci Scalar, Ricci squared, and Kretsc…

This https://arxiv.org/abs/2501.16472 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

Revisiting color superconductors in bottom-up holography
We revisit the problem of constructing a color superconducting phase in bottom-up holography. We introduce a model that describes the five-dimensional dynamics of a scalar field dual to a chiral symmetry breaking condensate, which is coupled to the RR 4-form. The coupling is given by a topological WZ term, which is elegantly responsible both for scalar condensation at high density, and color Higgsing in the condensed phase. This construction realizes both properties at finite density and Higgsi…

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 …

This https://arxiv.org/abs/2403.02771 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Absence of antisymmetric tensor fields : Clue from Starobinsky model of f(R) gravity
One of the surprising aspects of the present Universe, is the absence of any noticeable observable effects of higher-rank antisymmetric tensor fields in any natural phenomena. Here, we address the possible explanation of the absence of the higher rank antisymmetric tensor fields within the framework of $f(R)$ gravity. We explore the cosmological evolution of the scalar degrees of freedom associated with higher curvature term in a general $f(R)$ gravity model $f (R) = R +α_n R^n$. We show that …

3HDM at the ILC
Baradhwaj Coleppa, Akshat Khanna, Gokul B. Krishna
https://arxiv.org/abs/2506.24094 https://arxiv.org/pdf/2506.24094

3HDM at the ILC
The Three-Higgs-Doublet Model (3HDM) extends the Standard Model by introducing two additional scalar doublets, leading to a rich spectrum of new particles: three neutral CP-even Higgs bosons ($h_1$, $H_2$, $H_3$), two neutral CP-odd Higgs bosons ($A_2$, $A_3$), and two charged Higgs bosons ($H_2^+$, $H_3^+$). In this work, we present a phenomenological study of the 3HDM at the future International Linear Collider (ILC) with a center-of-mass energy of $\sqrt{s} = 1000\,\text{GeV}$. Applying a co…

Planar pulsating traveling wave solutions of non-cooperative Fisher--KPP systems in space-time periodic media
L\'eo Girardin (CNRS, ICJ, MMCS), Gr\'egoire Nadin (IDP, CNRS)
https://arxiv.org/abs/2506.22003

Planar pulsating traveling wave solutions of non-cooperative Fisher--KPP systems in space-time periodic media
Non-cooperative Fisher-KPP systems with space-time periodic coefficients are motivated for instance by models for structured populations evolving in periodic environments. This paper is concerned with entire solutions describing the invasion of open space by a persistent population at constant speed. These solutions are important in the understanding of long-time behaviors for the Cauchy problem. Adapting methods developed for scalar equations satisfying the comparison principle as well as meth…

Thermodynamic Curvature and Topological Insights of Hayward Black Holes with String Fluids
Ankit Anand, Saeed Noori Gashti, Aditya Singh
https://arxiv.org/abs/2506.23736

Thermodynamic Curvature and Topological Insights of Hayward Black Holes with String Fluids
In this paper, we study the influence of string fluids on the extended thermodynamic structure and microscopic interactions of Hayward black holes by employing thermodynamic geometry as an empirical tool. Using the novel equation of state obtained for regular black holes surrounded by string fluids, we analyze the extended phase space with enthalpy as the central thermodynamic potential. By examining the behavior of the normalized Ruppeiner curvature scalar $R_N$ in the temperature-volume $(T,V…

Heavy scalar molecule $B_{c}^{ } B_{c}^{-}$
S. S. Agaev, K. Azizi, H. Sundu
https://arxiv.org/abs/2506.19927 https://arxiv.org/pdf/25…

Heavy scalar molecule $B_{c}^{+} B_{c}^{-}$
Mass and full width of the heavy scalar molecule $\mathcal{M}$ composed of the mesons $B_{c}^{+}$ and $B_{c}^{-}$ are calculated in QCD sum rule framework. To find its mass and current coupling we apply the two-point sum rule method. The width of the hadronic molecule $\mathcal{M} =B_{c}^{+}B_{c}^{-}$ is evaluated by taking into account its dissociation to $η_cη_{b}, J/ψΥ$, and $ B_{c}^{+}B_{c}^{-} $ mesons. Decays into $D$ and $B$ meson pairs with appropriate charges and quantum numbers tr…

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…

Constraining Inflation via FIMP dark matter using the $\beta$-function with collider implications
Sarif Khan, Sourov Roy, Ananya Tapadar
https://arxiv.org/abs/2506.23770

Constraining Inflation via FIMP dark matter using the $β$-function with collider implications
The present study connects inflation and freeze-in type dark matter (DM) within the same setup. Although the observables in these two phenomena lie at vastly different energy scales, they have been properly handled using the RG running of couplings. For studying DM and inflation, the SM has been minimally extended by introducing an abelian dark gauge symmetry and a dark singlet scalar. In studying inflation, the SM Higgs doublet has been considered as the inflaton, which has a non-minimal coupl…

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: …

Significance of soft-scale breaking on primordial black hole production in Coleman-Weinberg type supercooling-phase transition
He-Xu Zhang, Katsuya Hashino, Hiroyuki Ishida, Shinya Matsuzaki
https://arxiv.org/abs/2506.23752

Significance of soft-scale breaking on primordial black hole production in Coleman-Weinberg type supercooling-phase transition
Ultra-supercooling phase transitions can generate large overdensities in the Universe, potentially leading to the formation of primordial black holes (PBHs), which can also be a dark matter candidate. In this work, we focus on the supercooling phase transition for the scale symmetry breaking based on the effective potential of the Coleman-Weinberg (CW) type. We investigate the effect on the PBH production in the presence of an additional mass term for the CW scalar field, what we call a soft-sc…

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…

Confining kinks. $\zeta$-regularized one-loop kink mass shifts in exotic field theories
Luis Inzunza, Juan Mateos Guilarte, Pablo Pais
https://arxiv.org/abs/2506.20440

Confining kinks. $ζ$-regularized one-loop kink mass shifts in exotic field theories
By combining stability analysis of scalar field theories with the Darboux transformation technique, we create models featuring kink-like solutions whose quantum perturbations are all bounded. On the one hand, the stability analysis relates scalar theories with Schrödinger equations, whose solutions serve as quantum perturbation modes. On the other hand, the Darboux transformation allows for constructing new exotic but solvable Schrödinger equations. This framework relates the quantum harmonic…

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. …

Stability Analysis of Four $f(Q)$ Gravity Models : A Cosmological Review in the Background of Bianchi-I Anisotropy
Subhajit Pal, Atanu Mukherjee, Ritabrata Biswas, Farook Rahaman
https://arxiv.org/abs/2506.21715

Stability Analysis of Four $f(Q)$ Gravity Models : A Cosmological Review in the Background of Bianchi-I Anisotropy
With the non-metricity scalar $Q$ as the functional argument, several $f(Q)$ gravity models is found to be proposed which are perfectly able to mimic the late time accelerated expansion as pointed out by the type Ia supernovae observations. Temperature fluctuation differences for two celestial hemispheres, Hubble tension, voids, dipole modulation, anisotropic inflation etc motivates us to think beyond the $Λ$CDM model and cosmological principle. Bianchi-I model portrays anisotropic universe im…

This https://arxiv.org/abs/2402.06558 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

The Asymptotic Structure of Cosmological Integrals
We provide a general analysis of the asymptotic behaviour of perturbative contributions to observables in arbitrary power-law FRW cosmologies, indistinctly the Bunch-Davies wavefunction and cosmological correlators. We consider a large class of scalar toy models, including conformally-coupled and massless scalars in arbitrary dimensions, that admits a first principle definition in terms of (generalised/weighted) cosmological polytopes. The perturbative contributions to an observable can be expr…

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…

On the Dark-Energy Enigma
Ali H. Chamseddine, J\"urg Fr\"ohlich
https://arxiv.org/abs/2506.21099 https://arxiv.org/pdf/2506…

On the Dark-Energy Enigma
We present a model that offers an explanation for the presence of (Dark Matter and) Dark Energy in the universe. A key idea is to express the volume form of the Lorentzian metric on space-time in terms of a positive function of a new scalar field multiplying a certain four-form given by the wedge product of the differential of the mimetic scalar field and a certain closed three-form. An ansatz for this three-form related to one commonly used to determine the winding number of a map from a three…

A Common Origin of Asymmetric Self-interacting Dark Matter and Dirac Leptogenesis
Manoranjan Dutta, Nimmala Narendra
https://arxiv.org/abs/2506.22388 https…

A Common Origin of Asymmetric Self-interacting Dark Matter and Dirac Leptogenesis
Assuming dark matter to be asymmetric as well as self-interacting and neutrinos to be Dirac fermions, we propose a framework to address the observed baryon imbalance of the universe. We add three right-handed neutrinos $ν_{R_i},\,{i=1,2,3}$, one singlet fermion $χ$, a doublet fermion $ψ$, and heavy scalar doublets $η_i,\,{i=1,2}$ to the Standard Model. Both $χ$ and $ψ$ are fermions with non-zero charge under an extended $U(1)_{B-L} \times U(1)_D$ symmetry. Additionally, a $\mathcal{Z}_2$ …

Towards Stochastic Inflation in Higher-Curvature Gravity
Yermek Aldabergenov, Ding Ding, Wei Lin, Yidun Wan
https://arxiv.org/abs/2506.21423 https://

Towards Stochastic Inflation in Higher-Curvature Gravity
We study stochastic inflation in the presence of higher-curvature terms non-minimally coupled to the inflaton. Focusing on quadratic curvature invariants, we single out the Gauss--Bonnet term which is known to avoid ghosts, while having non-trivial effects on the background and scalar mode evolution when coupled to the scalar field. Stochastic Klein--Gordon and Langevin equations are derived in the presence of the Gauss--Bonnet coupling, and their slow-roll and ultra-slow-roll limits are studie…

Finite temperature Casimir effect of a Lorentz-violating scalar with higher order derivatives
Andrea Erdas
https://arxiv.org/abs/2506.10284 https://…

Finite temperature Casimir effect of a Lorentz-violating scalar with higher order derivatives
In this work I study the finite temperature Casimir effect caused by a complex and massive scalar field that breaks Lorentz invariance in a CPT-even, aether-like manner. The Lorentz invariance breaking is caused by a constant space-like vector directly coupled to higher order field derivatives. This vector needs to be space-like in order to avoid non-causality problems that will arise with a time-like vector. I investigate the two scenarios of the scalar field satisfying either Dirichlet or mix…

Close Hyperbolic Encounters In f(R) Gravity
Jenna Bruton, Peter Dunsby, Alvaro de la Cruz-Dombriz
https://arxiv.org/abs/2506.20787 https://

Close Hyperbolic Encounters In f(R) Gravity
We explore the dynamics and gravitational-wave emission from black hole pairs on unbound orbits undergoing close hyperbolic encounters (CHEs) in dense astrophysical environments. While General Relativity predicts gravitational Bremsstrahlung radiation occurring at periastron, the contribution of the scalar gravitational-wave mode in fully general f(R) gravity remains largely unexplored. We characterize the f(R) scalar mode gravitational radiation for both non-precessing and precessing hyperboli…

Exact vacuum solution with Hopf structure in general relativity
Junpei Harada
https://arxiv.org/abs/2506.20878 https://arxiv.org/pdf/…

Exact vacuum solution with Hopf structure in general relativity
An exact solution to the vacuum Einstein equations is presented, whose structure is based on the Hopf fibration. The solution employs a geodesic null vector field that defines a twisting congruence and appears in the metric in Kerr-Schild form. This solution is of Petrov type D and involves two parameters. Remarkably, the resulting spacetime is regular, with no curvature singularities. Both the Kretschmann scalar and the Chern-Pontryagin scalar are nonzero and remain finite throughout the space…

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…

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, …

Scalar Triple-Heavy Tetraquark States With Quark Content $cc\bar{c}\bar{s}$
Yong-Jiang Xu, Luo-Geng Tian, Yuan Li, Jin-Yun Wu, Yong-Lu Liu, Ming-Qiu Huang
https://arxiv.org/abs/2506.14527

Scalar Triple-Heavy Tetraquark States With Quark Content $cc\bar{c}\bar{s}$
In this paper, we study the scalar triple-heavy tetraquark states with quark content $cc\bar{c}\bar{s}$, $η_{c}D_{s}$ molecular state and $[cc]_{A(T)}[\bar{c}\bar{s}]_{A(T)}$ compact tetraquark states, by the QCD sum rule method. First, we construct the needed interpolating currents, $J^{M}(x)$, $J^{T_{1}}(x)$, and $J^{T_{2}}(x)$. Then, we derive the sum rules for the masses and the current coupling constants. Finally, we numerically analyze these sum rules, and find $m_{M}=4.9392^{+0.0851}_{-…

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…

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…

Novel black holes with scalar hair in the Einstein-Maxwell-Scalar Theory with positive coupling
Hong Guo, Wei-Liang Qian, Bean Wang
https://arxiv.org/abs/2506.02445

Novel black holes with scalar hair in the Einstein-Maxwell-Scalar Theory with positive coupling
In this work, we find a new branch of hairy black hole solutions in the Einstein-Maxwell-Scalar (EMS) theory in four-dimensional asymptotically flat spacetimes. Different from spontaneous scalarization induced by tachyonic instabilities in Reissner-Nordström (RN) black holes with a negative coupling parameter, these scalar-hairy black hole solutions arise when the coupling parameter is positive, where nonlinear coupling plays the dominant role, meaning that the coupling is positively correlate…