Tootfinder

It's been bothering me for a while, so I created a Racket extension to refer to variables by position: eg,
(define hypotenuse
(lambda 2
(sqrt ( (square $0)
(square $1)))))
Why not. What fun. No more variable name choice paralysis! 🤣
https://github.com/shriram/lambda-n

GitHub - shriram/lambda-n: the lambda-n language
the lambda-n language. Contribute to shriram/lambda-n development by creating an account on GitHub.

Scott's Representation Theorem and the Univalent Karoubi Envelope
Arnoud van der Leer, Kobe Wullaert, Benedikt Ahrens
https://arxiv.org/abs/2506.22196 …

Scott's Representation Theorem and the Univalent Karoubi Envelope
Lambek and Scott constructed a correspondence between simply-typed lambda calculi and Cartesian closed categories. Scott's Representation Theorem is a cousin to this result for untyped lambda calculi. It states that every untyped lambda calculus arises from a reflexive object in some category. We present a formalization of Scott's Representation Theorem in univalent foundations, in the (Rocq-)UniMath library. Specifically, we implement two proofs of that theorem, one by Scott and one by Hyland.…

Classification of flag-transitive $2$-$(v, k, \lambda)$ designs with alternating group $A_n$($n \le 10$) as socle
Delu Tian, Qianfen Liao, Zhilin Zhang
https://arxiv.org/abs/2508.20716

Classification of flag-transitive $2$-$(v, k, λ)$ designs with alternating group $A_n$($n \le 10$) as socle
This paper is devoted to the classification of all flag-transitive point-primitive non-trivial $2$-$(v, k, λ)$ designs with the alternating group $A_n$($n \le 10$) as the socle of their automorphism groups, and 87 different designs are obtained up to isomorphism. The results of this study further improve the classification theory of designs under the action of almost simple groups, and provide reference for the follow-up study of similar problems.

Rectangular representations and $\lambda$-independence of algebraic monodromy groups
Chun-Yin Hui, Wonwoong Lee
https://arxiv.org/abs/2506.21941 https://…

Rectangular representations and $λ$-independence of algebraic monodromy groups
Let $\mathfrak g$ be a complex semisimple Lie algebra. We define what it means for a finite dimensional representation of $\mathfrak g$ to be rectangular and completely classify faithful rectangular representations. As an application, we obtain new $λ$-independence results on the algebraic monodromy groups of compatible systems of $λ$-adic Galois representations of number fields.

The variety of nilpotent pairs $(A,B)$ with $[A,B] = \lambda I$
Vlad Roman, Robert M. Guralnick
https://arxiv.org/abs/2508.20199 https://arxiv.org/pdf/2508…

The variety of nilpotent pairs $(A,B)$ with $[A,B] = λI$
Let $k$ be an algebraically closed field of characteristic $p >0$. We consider the variety of nilpotent pairs $(A,B)$ with $[A,B]=λI$, namely the set of pairs $ X = \{ (A,B) \in M_n(k) \times M_n(k) \mid A,B \text{ nilpotent}, [A,B]=λI, λ\in k \}$. We prove that if $n=pr$, then $X$ is irreducible of dimension $n^2$.

Challenging $\Lambda$CDM with Higher-Order GUP Corrections
Andronikos Paliathanasis, Genly Leon, Yoelsy Leyva, Giuseppe Gaetano Luciano, Amare Abebe
https://arxiv.org/abs/2508.20644

Challenging $Λ$CDM with Higher-Order GUP Corrections
We study quantum corrections to the $Λ$CDM model model arising from a minimum measurable length in Heisenberg's uncertainty principle. We focus on a higher-order Generalized Uncertainty Principle, beyond the quadratic form. This generalized GUP introduces two free parameters, and we determine the modified Friedmann equation. This framework leads to a perturbative cosmological model that naturally reduces to $Λ$CDM in an appropriate limiting case of the deformation parameters. We construct the…

SCET sum rules for $\Lambda_b \to \Lambda \ell^ \ell^-$, $\Lambda \gamma$ decays
Long-Shun Lu, Cai-Dian L\"u, Yue-Long Shen, Yan-Bing Wei
https://arxiv.org/abs/2506.21419

SCET sum rules for $Λ_b$ $\rightarrow$ $Λ\ell^+\ell^-$, $Λγ$ decays
We construct light-cone sum rules for various types of effective form factors in the $Λ_b \to Λ\ell^+\ell^-$ and $Λ_b \to Λγ$ decays by analyzing vacuum-to-$Λ_b$ (or $γ^\ast$-to-$Λ_b$) correlation functions with the light $Λ$-baryon interpolating current. These form factors, defined via hadronic matrix elements within soft-collinear effective theory (SCET), enter the next-to-leading-power QCD factorization formulas for large-recoil transitions. Implementing the perturbative matching fr…

from my link log —
The Epic Verse calculus: a core calculus for functional logic programming.
https://simon.peytonjones.org/verse-calculus/
saved 2025-06-12

Does DESI DR2 challenge $\Lambda$CDM paradigm ?
Himanshu Chaudhary, Salvatore Capozziello, Vipin Kumar Sharma, Ghulam Mustafa
https://arxiv.org/abs/2507.21607 https://

Does DESI DR2 challenge $Λ$CDM paradigm ?
Although the debate about the systematic errors of DESI DR1 is still open, recent DESI DR2 is consistent with DESI DR1 and further strengthens the results of DESI DR1. In this analysis, we present a $\sim 2.38 σ$ discrepancy between Planck $Λ$ CDM cosmology and the DESI DR2 Luminous Red Galaxy (LRG1) data at $z_{\text{eff}} = 0.51$, which predicts an unexpectedly large value for $Ω_m$, $Ω_m = 0.471^{+0.119}_{-0.065}$. We find that the $w_0 w_a$CDM model, using DESI DR2 data, suggests $w_0 >…

Ultraviolet photon production rates of the first stars: Impact on the He II $\lambda$ 1640 \AA{} emission line from primordial star clusters and the 21-cm signal from cosmic dawn
Joel Wasserman, Erik Zackrisson, Jiten Dhandha, Anastasia Fialkov, Leon Noble, Suman Majumdar
https://arxiv.org/abs/2507.21764

Ultraviolet photon production rates of the first stars: Impact on the He II $λ$ 1640 Å emission line from primordial star clusters and the 21-cm signal from cosmic dawn
The first stars, the chemically pristine Population III, likely played an important role in heating the intergalactic medium during the epoch of cosmic dawn. The very high effective temperatures ($\sim 10^5$ K) predicted for the most massive Population III stars could also give rise to tell-tale signatures in the emission-line spectra of early star clusters or small galaxies dominated by such stars. Important quantities in modelling their observational signatures include their photon production…

Replaced article(s) found for nucl-ex. https://arxiv.org/list/nucl-ex/new
[1/1]:
- Binding energy of $^{3}_{\Lambda}\rm{H}$ and $^{4}_{\Lambda}\rm{H}$ via image analyses of nuclear...
Ayumi Kasagi, et al.

Study of the $\chi_{cJ}\rightarrow\Lambda\bar{\Lambda}\eta^\prime$ decays
BESIII Collaboration, et al.
https://arxiv.org/abs/2508.18761 https://arxiv.org/p…

Study of the $χ_{cJ}\rightarrowΛ\barΛη^\prime$ decays
Using a data sample of $(2.712\pm0.014)\times10^{9}$ $ψ(3686)$ events collected with the BESIII detector at the BEPCII collider, we investigate the decays $χ_{cJ} \rightarrow Λ\barΛ η^\prime$ for $J=0,~1,~2$ via the radiative transition $ψ(3686) \rightarrow γχ_{cJ}$. The decays $χ_{c0,2}\rightarrowΛ\barΛη^\prime$ are observed for the first time, with statistical significances of 6.7$\,σ$ and 6.4$\,σ$, respectively. Evidence for the decay $χ_{c1}\rightarrowΛ\barΛη^\prime$ is fo…

Block-transitive t-(k^2,k,\lambda) designs associated to two dimensional projective special linear groups
Guoqiang Xiong, Haiyan Guan
https://arxiv.org/abs/2508.19515 https://…

Block-transitive t-(k^2,k,λ) designs associated to two dimensional projective special linear groups
This paper investigates block-transitive automorphism groups of t-(k^2,k,λ) designs. Let D be a non-trivial t-(k^2,k,λ) design, G \leq \Aut(D) be block-transitive with X\unlhd G\leq \Aut(X), where X = PSL(2,q)(q\geq4). Then q = 8 and D is a 2-(36,6,λ) design with λ\in \{2,6,9,12,18,36\}.

Classification of $\Lambda \neq 0$-vacuum algebraically special spacetimes with conformally flat $\mathscr I$ from Weyl tensor expansion
Marc Mars, Carlos Pe\'on-Nieto
https://arxiv.org/abs/2507.21292

Classification of $Λ\neq 0$-vacuum algebraically special spacetimes with conformally flat $\mathscr I$ from Weyl tensor expansion
We introduce a general algebraic decomposition of Riemann-like and Weyl-like tensors with respect to a non-null vector $u$. We derive Gauss, Codazzi and Ricci-type identities for the Weyl tensor, that allow to relate the components of the spacetime Weyl tensor with intrinsic quantities of the hypersurfaces orthogonal to $u$. Restricting to the case of $Λ$-vacuum spacetimes (with $Λ\neq 0$ and any dimension) admiting a conformal compactification, we then study the behaviour of the Weyl tenso…

A Quantum-Control Lambda-Calculus with Multiple Measurement Bases
Alejandro D\'iaz-Caro, Nicolas A. Monzon
https://arxiv.org/abs/2506.16244 https://

A Quantum-Control Lambda-Calculus with Multiple Measurement Bases
We introduce Lambda-SX, a typed quantum lambda-calculus that supports multiple measurement bases. By tracking duplicability relative to arbitrary bases within the type system, Lambda-SX enables more flexible control and compositional reasoning about measurements. We formalise its syntax, typing rules, subtyping, and operational semantics, and establish its key meta-theoretical properties. This proof-of-concept shows that support for multiple bases can be coherently integrated into the type disc…

Determination of the sensitivity of $\Lambda$ and $\Lambda^ _c$ electric dipole moments using a full angular analysis
R. T. Ovsiannikov, A. Yu. Korchin, E. Kou
https://arxiv.org/abs/2507.19056

Determination of the sensitivity of $Λ$ and $Λ^+_c$ electric dipole moments using a full angular analysis
A search for a non-zero Electric Dipole Moment (EDM) of particles, which is a clear signal of a violation of CP symmetry, is one of the unique ways to discover physics beyond the Standard Model. In this paper, we discuss a method for determining the EDM of baryons from the full angular distribution of final particles in electron-positron pair annihilation processes. The question of how accurately the state-of-the-art experiments can determine EDM of $Λ$ and $Λ_c^+$ baryons is discussed in det…

Replaced article(s) found for math.AT. https://arxiv.org/list/math.AT/new
[1/1]:
- Computational Approaches to the Singer Transfer: Preimages in the Lambda Algebra and $G_k$-Invari...
Dang Vo Phuc

Comment on "Dynamical Dark Energy at Late Time $\Lambda$CDM"
James M. Cline
https://arxiv.org/abs/2507.21278 https://arxiv.org/pdf/2507.21278

Comment on "Dynamical Dark Energy at Late Time $Λ$CDM"
In arXiv:2505.18900 it was claimed that an apparent evolution of the dark energy equation of state occurs within the standard $Λ$CDM cosmological model. I point out that this erroneous conclusion is due to a mathematical error.

Soundtoys Donating 100% Of Sales On June 25 & 26 To Supporting LGBTQIA Civil Rights https://www.synthtopia.com/content/2025/06/25/soundtoys-donating-100-of-sales-on-june-25-26-to-supporting-lgbtqia-civi…

Soundtoys Donating 100% Of Sales On June 25 & 26 To Supporting LGBTQIA+ Civil Rights
Customers who purchase any Soundtoys plug-in, bundle, or upgrade during the campaign period will help support Lambda Legal’s legal advocacy, public policy work, and impact litigation efforts across…

I learned something new today—threat actors are using AWS Lambda URLs for C2. Lambda is an ephemeral serverless function service from AWS. They have different URL endpoints in the different AWS regions. One example is: <uniquename>.lambda-url.ap-southeast-1.on[.]aws
Something you may want to hunt for. #cybersecurity

Sources: Lambda is in talks for a funding round that could value the cloud services company between $4B and $5B ahead of a potential IPO by the end of 2025 (Bloomberg)
https://www.bloomberg.com/news/articles/2025-08-14/nvidia-b…

from my link log —
Dana Scott on the lambda calculus, then and now.
https://www.cis.upenn.edu/~cis5110/lambda_calculus_timeline-Scott.pdf
saved 2025-07-18

$\Lambda$ and $\Sigma$ potentials in dense matter based on chiral EFT: Bridging heavy-ion collisions, hypernuclei, and neutron stars
Asanosuke Jinno, Koichi Murase, Yasushi Nara, Johann Haidenbauer
https://arxiv.org/abs/2508.19560

$Λ$ and $Σ$ potentials in dense matter based on chiral EFT: Bridging heavy-ion collisions, hypernuclei, and neutron stars
The $Λ$ and $Σ$ directed flows at $\sqrt{s_{NN}}=4.5~\mathrm{GeV}$ are investigated to examine their sensitivity to the hyperon single-particle potentials. The single-particle potentials are obtained from $G$-matrix calculations with two- and three-body forces based on SU(3) chiral effective field theory. The $Λ+Σ^0$ directed flow shows sensitivity to the variation in the $Σ$ single-particle potential. Its effect is more pronounced for the $Σ^0$ directed flow.

The Extended Atlas of Low-resolution Spectra from the Infrared Astronomical Satellite
G. C. Sloan, Kathleen E. Kraemer, K. Volk
https://arxiv.org/abs/2507.14134

The Extended Atlas of Low-resolution Spectra from the Infrared Astronomical Satellite
We present an updated atlas of spectra from the Low-Resolution Spectrometer (LRS) on the Infrared Astronomical Satellite (IRAS), which took spectra from 7.67 to 22.73 um with a spectral resolving power (lambda / Delta lambda) of 20-60. The updated atlas includes 11,238 spectra, including 5425 spectra published in the original LRS Atlas, 5796 spectra published in three later papers, and 17 spectra previously available online but not published. The updated atlas has significantly more sources clo…

Soundtoys Donating 100% Of Sales On June 25 & 26 To Supporting LGBTQIA Civil Rights https://www.synthtopia.com/content/2025/06

Soundtoys Donating 100% Of Sales On June 25 & 26 To Supporting LGBTQIA+ Civil Rights
Customers who purchase any Soundtoys plug-in, bundle, or upgrade during the campaign period will help support Lambda Legal’s legal advocacy, public policy work, and impact litigation efforts across…

from my link log —
A multivalued language with a dependent type system. (A precursor to Epic Verse.)
https://www.leafpetersen.com/leaf/publications/dtp2013/lambda-aleph-overview.pdf
saved 2025-06-12

The $\Lambda_{b} \to \Lambda$ transition form factors in perturbative QCD approach
Lei Yang, Jia-Jie Han, Qin Chang, Fu-Sheng Yu
https://arxiv.org/abs/2508.18069 https://…

The $Λ_{b} \to Λ$ transition form factors in perturbative QCD approach
In this work, we investigate the $Λ_b \to Λ$ transition form factors in the perturbative QCD (PQCD) approach, incorporating higher-twist light-cone distribution amplitudes (LCDAs). The resulted form factors show that higher-twist LCDAs are dominant numerically. By combining our PQCD predictions at low-$q^2$ with lattice QCD results at high-$q^2$, $z$-series expansion fits are performed to parametrize the form factors over the full kinematic range. We also provide the prediction for physical o…

Don't exhaust, don't waste
Riccardo Bianchini, Francesco Dagnino, Paola Giannini, Elena Zucca
https://arxiv.org/abs/2507.13792 https://

Don't exhaust, don't waste
We extend the semantics and type system of a lambda calculus equipped with common constructs to be resource-aware. That is, the semantics keep tracks of the usage of resources, and is stuck, besides in case of type errors, if either a needed resource is exhausted, or a provided resource would be wasted. In such way, the type system guarantees, besides standard soundness, that for well-typed programs there is a computation where no resource gets either exhausted or wasted. The no-waste extensi…

Search for a bound state of $\Lambda_{c}\bar{\Sigma}_{c}$ near threshold
BESIII Collaboration, et al.
https://arxiv.org/abs/2508.18594 https://arxiv.org/pd…

Search for a bound state of $Λ_{c}\barΣ_{c}$ near threshold
We search for a possible $Λ_{c} \bar{Σ}_{c}$ bound state, denoted as $H_{c}^{\pm}$, via the $ e^{+}e^{-} \to π^{+} π^{-} Λ_{c}^{+}\barΛ_{c}^{-}$ process for the first time. This analysis utilizes 207.8 and 159.3 pb$^{-1}$ of $e^{+}e^{-}$ annihilation data at the center-of-mass energies of 4918.02 and 4950.93 MeV, respectively, collected with the BESIII detector at the BEPCII collider. No statistically significant signal is observed. The upper limits of the product of Born cross section an…

from my link log —
Lambda calculus cooked N ways: Benchmarks for capture-avoiding substitution.
https://github.com/sweirich/lambda-n-ways
saved 2025-06-14

GitHub - sweirich/lambda-n-ways: Benchmarks for capture-avoiding substitution
Benchmarks for capture-avoiding substitution. Contribute to sweirich/lambda-n-ways development by creating an account on GitHub.

Revisiting the $\Lambda_c^ \rightarrow\bar{K}^0\eta p$ reaction: the role of $N^*(1535),~ N^*(1650)$ and $\Sigma(1620)$
Jing Song, Melahat Bayar, Yi-Yao Li, Eulogio Oset
https://arxiv.org/abs/2507.19240

Revisiting the $Λ_c^+\rightarrow\bar{K}^0ηp$ reaction: the role of $N^*(1535),~ N^*(1650)$ and $Σ(1620)$
We perform a theoretical study of the weak decay $Λ_c^+ \rightarrow \bar{K}^0 ηp$ using a coupled-channel chiral unitary approach that incorporates both pseudoscalar-baryon and vector-baryon interactions. Our framework includes contributions from both internal and external weak emission mechanisms, as well as strong final state interactions. We assume that the $N^*(1535)$ and $N^*(1650)$ resonances are dynamically generated through meson-baryon scattering and they appear as distinct structure…

Refined Constraints on the Hubble Constant from Localized FRBs with Assessment of Systematic Effects
Chenyuan Xu, Yi Feng, Jiaying Xu
https://arxiv.org/abs/2507.18946 https://…

Refined Constraints on the Hubble Constant from Localized FRBs with Assessment of Systematic Effects
The dispersion measure-redshift relation of fast radio bursts (FRBs) provides a valuable cosmological probe for constraining the Hubble constant, offering an independent measurement that could help resolve the ongoing Hubble tension. In this paper, we begin with a sample of 117 localized FRBs and use 95 of them to constrain $H_0$ to $71.28^{+1.90}_{-2.08}$ km s$^{-1}$ Mpc$^{-1}$ within the standard Lambda Cold Dark Matter ($Λ$CDM) model. The resulting statistical uncertainty is below 2.8\%, im…

On {\lambda}-Cent-Dians and Generalized-Center for Network Design: Formulations and Algorithms
V\'ictor Bucarey, Natividad Gonz\'alez-Blanco, Martine Labb\'e, Juan A. Mesa
https://arxiv.org/abs/2506.14839

On λ-Cent-Dians and Generalized-Center for Network Design: Formulations and Algorithms
In this paper, we study the $λ$-centdian problem in the domain of Network Design. The focus is on designing a sub-network within a given underlying network while adhering to a budget constraint. This sub-network is intended to efficiently serve a collection of origin/destination demand pairs. We extend the work presented in \cite{bucarey2024on}, providing an algorithmic perspective on the generalized $λ$-centdian problem. In particular, we provide a mathematical formulation for $λ\geq 0$ and…

Role of $K^*_0(700)$ exchange in the $p \bar{p} \to \Lambda \bar{\Lambda}$ reaction
Hao-Nan Wang, Xing-Yi Ji, De-Min Li, Yue Ma, En Wang, Ju-Jun Xie
https://arxiv.org/abs/2508.16912

Role of $K^*_0(700)$ exchange in the $p \bar{p} \to Λ\barΛ$ reaction
Regarding the reaction $p \bar{p} \to Λ\barΛ$, we provide a dynamical explanation focusing on its total and differential cross section based on the effective Lagrangian approach. Incorporating the $t$-channel exchange of the $K^*_0(700)$ meson and $s$-channel contribution from the vector excited state, we can reproduce the current experimental data fairly well in a wide energy region. Compared to the conventional $K$ and $K^*$ mesons exchange, the $K^*_0(700)$ meson exchange plays a more esse…

from my link log —
Dependent types and program equivalence.
https://www.seas.upenn.edu/~sweirich/papers/popl10-lambda-eek.pdf
saved 2025-06-10

Woof. This made my brain hurt over a few weeks between delighting customers, but I persevered.
Firecracker is the tiny, lightweight VM technology behind AWS Lambda "serverless" Function as a Service. You can run these tiny, tiny, fast VMs on-premises if that solves a business problem.
Anyway, here is an actual working tutorial that I wrote as most of the major tutorials out there did not work for me. Enjoy.

GitHub - DennisFaucher/firecracker: Learning Firecracker "Serverless" MicroVMs
Learning Firecracker "Serverless" MicroVMs. Contribute to DennisFaucher/firecracker development by creating an account on GitHub.

Term Assignment and Categorical Models for Intuitionistic Linear Logic with Subexponentials
Daniel Rogozin
https://arxiv.org/abs/2507.12360 https://arxiv.o…

Term Assignment and Categorical Models for Intuitionistic Linear Logic with Subexponentials
In this paper, we present a typed lambda calculus ${\bf SILL}(λ)_Σ$, a type-theoretic version of intuitionistic linear logic with subexponentials, that is, we have many resource comonadic modalities with some interconnections between them given by a subexponential signature. We also give proof normalisation rules and prove the strong normalisation and Church-Rosser properties for $β$-reduction by adapting the Tait-Girard method to subexponential modalities. Further, we analyse subexponential…

Initial conditions and bulk viscosity effects on $\Lambda$ polarization in high-energy heavy ion collisions
Andrea Palermo
https://arxiv.org/abs/2507.19463 https://

Initial conditions and bulk viscosity effects on $Λ$ polarization in high-energy heavy ion collisions
The $Λ$ spin polarization is a crucial probe of the gradients of velocity and temperature in the quark-gluon plasma generated in heavy-ion collisions. However, it is still not systematically used to tune hydrodynamic models. In this work, we investigate the influence of different initial conditions and parametrization of the bulk viscosity on $Λ$ polarization, showing that they affect the local polarization significantly. These results highlight the impact that the use of local polarization c…

Cluster breaking and reconfiguration effects in 12 Lambda B hypernucleus
Jiaqi Tian, Mengjiao Lyu, Akinobu Dote, Zheng Cheng, Takayuki Myo, Masahiro Isaka, Hisashi Horiuchi, Hiroki Takemoto, Hiroshi Toki, Niu Wan, Qing Zhao
https://arxiv.org/abs/2508.11937

Cluster breaking and reconfiguration effects in 12 Lambda B hypernucleus
We investigate the cluster-breaking effect and spatial distribution of negative-parity states in the 12 Lambda B hypernucleus using the Hyper-Brink model with cluster-breaking(CB-Hyper-Brink) optimized via Control Neural Network (Ctrl.NN). The results demonstrate that the inclusion of cluster-breaking is essential for accurately reproducing the observed low-lying energy levels and for making reliable predictions of the Hoyle-analog state 1-4 in 12 Lambda B. Cluster-breaking manifests as strong …

Replaced article(s) found for cs.NE. https://arxiv.org/list/cs.NE/new
[1/1]:
- Multi-parameter Control for the $(1 (\lambda,\lambda))$-GA on OneMax via Deep Reinforcement Learning
Tai Nguyen, Phong Le, Carola Doerr, Nguyen Dang

Measurement of branching fractions and $CP$ asymmetries in $\mathit{\Lambda}_b^0(\mathit{\Xi}_b^0)\!\to pK_{\mathrm S}^0h^-$ decays
LHCb collaboration, et al.
https://arxiv.org/abs/2508.17836

Measurement of branching fractions and $CP$ asymmetries in $\mathitΛ_b^0(\mathitΞ_b^0)\!\to pK_{\mathrm S}^0h^-$ decays
A study of $\mathitΛ_b^0$ and $\mathitΞ_b^0$ baryon decays to the final states $pK_{\mathrm S}^0π^-$ and $pK_{\mathrm S}^0K^-$ is performed using $pp$ collision data collected by the LHCb experiment, corresponding to an integrated luminosity of $9\,\mathrm{fb}^{-1}$. The decays $\mathitΛ_b^0\!\to pK_{\mathrm S}^0K^-$ and $\mathitΞ_b^0\!\to pK_{\mathrm S}^0K^-$ are observed for the first time, with significances reaching eight standard deviations. The branching fractions and integrated $CP$…

from my link log —
Implementing a functional language with graph reduction.
https://thma.github.io/posts/2021-12-27-Implementing-a-functional-language-with-Graph-Reduction.html
saved 2025-07-27

On a class of lambda-hyponormal operators
Y. Estaremi, M. S. Al Ghafri, and S. Shamsigamchi
https://arxiv.org/abs/2508.04311 https://arxiv.org/pdf/2508.043…

On a class of lambda-hyponormal operators
In this paper we define $λ$-hyponormal operators on an infinite dimensional Hilbert space $\mathcal{H}$ and find a class of $λ$-hyponormal operators that can not be hypercyclic. Also, we study closedness of range and $λ$-hyponormality of weighted composition operators on the Hilbert space $\mathcal{H}=L^2(μ)$. Moreover, we apply the hypercyclicity results to $λ$-hyponormal weighted composition operators. Finally, we provide some examples to illustrate our main results.

Topological dark energy from spacetime foam: A challenge for $\Lambda$CDM
Fotios K. Anagnostopoulos, Stylianos A. Tsilioukas, Emmanuel N. Saridakis
https://arxiv.org/abs/2507.18389

Topological dark energy from spacetime foam: A challenge for $Λ$CDM
Using only the standard considerations of spacetime foam and the Euclidean Quantum Gravity techniques known long ago, we result to a model of Topological Dark Energy (TDE) that outperforms the standard $Λ$CDM paradigm with regard to data fitting efficiency. Specifically, it is known that at the foam level, topologically non-trivial solutions such as instantons appear. In the particular case of Einstein-Gauss-Bonnet gravity, we obtain an effective dynamical dark energy term proportional to the …

A Piecewise Smooth $\lambda$-Lemma
Claudio A. Buzzi, Paulo Santana, Luan V. M. F. Silva
https://arxiv.org/abs/2507.10896 https://arxi…

A Piecewise Smooth $λ$-Lemma
In this paper we provide extensions of the $λ$-Lemma (also known as Inclination Lemma) for piecewise smooth vector fields and maps. In order to achieve our main result, we investigate the regularity of time-T-maps of piecewise smooth vector fields defined at crossing orbits. We prove that these maps are homeomorphisms and also piecewise smooth diffeomorphisms.

$\Lambda$-Type Giant Atom Mediated Controllable Single-Photon Transport in a One-Dimensional Chiral Waveguide
Yimei Wang, Jing Li, Jing Lu, Lan Zhou
https://arxiv.org/abs/2508.05510

$Λ$-Type Giant Atom Mediated Controllable Single-Photon Transport in a One-Dimensional Chiral Waveguide
We investigate the single-photon scattering spectrum of a driven $Λ$-type giant atom system chirally coupled to a one-dimensional (1D) waveguide. By employing a real-space scattering approach, we obtain analytical solutions for the scattering amplitudes that remain valid in both Markovian and non-Markovian regimes. We observe that an external driving field induces a splitting of the transmission spectrum's dip into double dips, with the distance between the two dips increasing as the strength …

Recurrent Optical Spectrum Slicers as multi-{\lambda} processors for WDM optical equalization of IM/DD channels
Kostas Sozos, Francesco Da Ros, George Sarantoglou, Charis Mesaritakis, Adonis Bogris
https://arxiv.org/abs/2507.11659

Recurrent Optical Spectrum Slicers as multi-λ processors for WDM optical equalization of IM/DD channels
We report recurrent optical spectrum slicers as multi-wavelength optical processors in dispersion impaired IM/DD transmission systems with the use of programmable photonics. We demonstrate simultaneous equalization of three 64 Gb/s PAM-4 wavelengths after 75 km in the C-band and high tolerance to wavelength grid.

Constraining deviations from $\Lambda$CDM in the Hubble expansion rate
Yupeng Yang
https://arxiv.org/abs/2508.17848 https://arxiv.org/pdf/2508.17848…

Constraining deviations from $Λ$CDM in the Hubble expansion rate
(abridged)We explore a phenomenological model that quantifies the deviation of the Hubble expansion rate from the standard scenario. The specific form of this model is expressed as $H^{2}(z) = H^{2}_{\rm ΛCDM}(Ω_m, z)[1+δ(z)]$. We consider three forms of $δ(z)$: model I, $δ(z)=δ_c$; model II, $δ(z)=δ_{c}z/(1+z)$, and model III, $δ(z)=δ_{c}{\rm ln}(1+z)$. Here, $δ_c$ represents a constant value. To constrain the models, we utilize a comprehensive set of observational data, including D…

Gr\"obner-Shirshov bases of Rota-Baxter algebra of weight $\lambda$ with spectrum lying in $\{0,-\lambda\}$
H. Alhussein
https://arxiv.org/abs/2507.01614

Gröbner-Shirshov bases of Rota-Baxter algebra of weight $λ$ with spectrum lying in $\{0,-λ\}$
It is known that if $A$ is a finite-dimensional unital algebra equipped with a Rota-Baxter operator $R$ of weight $λ$, then spectrum of $R$ is a subset of $\{0,-λ\}$. We are interested on finding all consequences of the Rota-Baxter relation and the relation of the form $R^k(R+λ{\rm id})^l = 0$. In 2024, H.~Qiu, S. Zheng, Y. Dan solved this problem for $k = l = 1$ and $λ\neq0$. We find a Gröbner-Shirshov basis of the ideal generated by these two relations in general case.

Probing Spin-Lifetime Correlations in Entangled Hyperon-AntiHyperon Pairs
Aihong Tang
https://arxiv.org/abs/2507.18507 https://arxiv.org/pdf/2507.18507

Probing Spin-Lifetime Correlations in Entangled Hyperon-AntiHyperon Pairs
Quantum entanglement has now been demonstrated in several hadronic systems, revealing that non-classical spin correlations survive even through the strong-interaction hadronization process. To date, however, all studies have focused exclusively on angular observables, leaving the possibility untouched that quantum coherence might also influence the decay times of entangled partners. In this work we propose two data-driven tests - relative and absolute lifetime correlations - for Lambda-antiLamb…

Dual-polarization structure and nuclear structure effect on $\Lambda$ polarization
X. G. Deng, Y. G. Ma
https://arxiv.org/abs/2508.19105 https://arxiv.org/…

Dual-polarization structure and nuclear structure effect on $Λ$ polarization
We report a novel manifestation of spin-vorticity interplay in relativistic heavy-ion collisions. Using $^{16}$O+$^{197}$Au at $\sqrt{s_{\rm NN}}=7.7$ GeV as a test case, we show that the $Λ$ hyperon exhibits a clear dual-polarization structure, observed here in central $^{16}$O + $^{197}$Au collisions for the first time. The polarization is further highly sensitive to the intrinsic nuclear geometry: different $α$-cluster configurations of $^{16}$O, ranging from chain-like to tetrahedral, lea…

$\lambda$ and $\rho$ Regge trajectories for bottom-charm tetraquarks $(bq)(\bar{c}\bar{q}')$ and $(cq)(\bar{b}\bar{q}')$
Jiao-Kai Chen, He Song, Xin-Ru Liu
https://arxiv.org/abs/2508.18899

$λ$ and $ρ$ Regge trajectories for bottom-charm tetraquarks $(bq)(\bar{c}\bar{q}')$ and $(cq)(\bar{b}\bar{q}')$
Using the newly proposed tetraquark Regge trajectory relations, we investigate three series of Regge trajectories for bottom-charm tetraquarks $(bq)(\bar{c}\bar{q}')$ and $(cq)(\bar{b}\bar{q}')$ with $q,q'=u,d,s$: the $ρ_1$-, $ρ_2$-, and $λ$-trajectories. We provide rough estimates for the masses of the $ρ_1$-, $ρ_2$-, and $λ$-excited states. Except for the $λ$-trajectories, the complete forms of the other two series of Regge trajectories for bottom-charm tetraquarks are lengthy and cumb…

Measurements of the cross sections of $e^{ }e^{-}\to \Sigma_{c}\bar{\Sigma}_{c}$ and $\Lambda_c^{ }\bar{\Sigma}_{c}^{-}$ near kinematic thresholds
BESIII Collaboration
https://arxiv.org/abs/2508.16871 …

Measurements of the cross sections of $e^{+}e^{-}\to Σ_{c}\barΣ_{c}$ and $Λ_c^{+}\barΣ_{c}^{-}$ near kinematic thresholds
Based on $e^{+}e^{-}$ annihilation data collected with the BESIII detector at the BEPCII collider, searches for the $e^{+}e^{-}\toΣ_{c}\barΣ_{c}$ ($Σ_{c}^{+}\barΣ_{c}^{-}$, $Σ_{c}^{0}\barΣ_{c}^{0}$ and $Σ_{c}^{++}\barΣ_{c}^{--}$) processes, as well as for the isospin-violating process $e^{+}e^{-}\toΛ_c^{+}\barΣ_{c}^{-}$, are conducted for the first time at $\sqrt{s}=4.750$, $4.781$, $4.843$, $4.918$, and $4.951$ GeV. As no signals are observed for all the above channels, the upper lim…

Design switching on graphs
Ferdinand Ihringer, Robin Simoens
https://arxiv.org/abs/2508.11523 https://arxiv.org/pdf/2508.11523

Design switching on graphs
We show that each (r, lambda)-design yields a class of switching methods that can be used produce cospectral graphs. We use this to explain several specific switching methods such as Godsil-McKay (GM) switching and Wang-Qiu-Hu (WQH) switching.

Addressing Dipole Tension via Clustering in $\Lambda$CDM and beyond
Arefeh Daei Rasouli, Haniyeh S. Tadayyoni, Shant Baghram, Sohrab Rahvar
https://arxiv.org/abs/2508.18259 http…

Addressing Dipole Tension via Clustering in $Λ$CDM and beyond
The dipole in the angular distribution of the cosmic microwave background (CMB) is typically attributed to the Doppler effect and our motion relative to the CMB rest frame. It is expected that observations of large-scale structures would also exhibit a related kinematic dipole, helping to confirm the kinematic origin of the CMB dipole. However, numerous studies of the large-scale structure dipole have shown significant discrepancies with predictions based on the CMB. In this work, we investigat…

Replaced article(s) found for cs.PL. https://arxiv.org/list/cs.PL/new
[1/1]:
Opportunistically Parallel Lambda Calculus
https://

New Blog - Boot a VM in 3 Seconds
Woof. This made my brain hurt over a few weeks between delighting customers, but I persevered.
Firecracker is the tiny, lightweight VM technology behind AWS Lambda "serverless" Function as a Service. You can run these tiny, tiny, fast VMs on-premises if that solves a business problem.
Anyway, here is an actual working tutorial that I wrote as most of the major tutorials out there did not work for me. Enjoy.

Boot a VM in 3 Seconds - Firecracker
Boot a VM in 3 Seconds - Firecracker (This is a copy of the README from my GitHub repo where you will find all the files to do this yoursel...

from my link log —
Anaphoric macros introduce hidden bindings in Lisp.
https://letoverlambda.com/index.cl/guest/chap6.html
saved 2025-08-16

Reachability is Decidable for ATM-Typable Finitary PCF with Effect Handlers
Ryunosuke Endo, Tachio Terauchi
https://arxiv.org/abs/2508.12572 https://arxiv.…

Reachability is Decidable for ATM-Typable Finitary PCF with Effect Handlers
It is well known that the reachability problem for simply-typed lambda calculus with recursive definitions and finite base-type values (finitary PCF) is decidable. A recent paper by Dal Lago and Ghyselen has shown that the same problem becomes undecidable when the language is extended with algebraic effect and handlers (effect handlers). We show that, perhaps surprisingly, the problem becomes decidable even with effect handlers when the type system is extended with answer type modification (ATM…

Characteristic equations of linearized $\lambda R$ gravity
J. Aldair Pantoja-Gonzalez (Puebla U., Inst. Fis.), D. Vanessa Castro-Luna (Puebla U., Inst. Fis.), Alberto Escalante (Puebla U., Inst. Fis.)
https://arxiv.org/abs/2506.16603

Characteristic equations of linearized $λR$ gravity
A detailed Hamilton-Jacobi analysis for linearized $λR$ gravity is developed. The model is constructed by rewriting linearized gravity in terms of a parameter $λ$ and new variables. The set of all hamiltonians is identified successfully, and the fundamental differential is established. The non-involutive hamiltonians are eliminated, and the Hamilton-Jacobi generalized brackets are calculated. Such brackets are used to report the characteristic equations, and the counting of the number of degr…

First observation of the $\mathit{\Lambda}_b^{0}\!\rightarrow\mathit{\Lambda}_{c}^{ }D_{s}^{-}K^{ }K^{-}$ decay and search for pentaquarks in the $\mathit{\Lambda}_{c}^{ }D_{s}^{-}$ system
LHCb collaboration, et al.
https://arxiv.org/abs/2507.10713

First observation of the $\mathitΛ_b^{0}\!\rightarrow\mathitΛ_{c}^{+}D_{s}^{-}K^{+}K^{-}$ decay and search for pentaquarks in the $\mathitΛ_{c}^{+}D_{s}^{-}$ system
The $\mathitΛ_b^{0}\!\rightarrow\mathitΛ_{c}^{+}D_{s}^{-}K^{+}K^{-}$ decay is observed for the first time using the data sample from proton-proton collisions recorded at a center-of-mass energy of $13\,\text{TeV}$ with the LHCb detector, corresponding to an integrated luminosity of $6\,\text{fb}^{-1}$. The ratio of branching fraction to that of $\mathitΛ_b^{0} \!\rightarrow\mathitΛ_{c}^{+}D_{s}^{-}$ decays is measured as $0.0141 \pm 0.0019 \pm 0.0012$, where the first uncertainty is statist…

Replaced article(s) found for math.AT. https://arxiv.org/list/math.AT/new
[1/1]:
- Computational Approaches to the Singer Transfer: Preimages in the Lambda Algebra and $G_k$-Invari...
Dang Vo Phuc

from my link log —
A tutorial implementation of a dependently typed lambda calculus.
https://webspace.science.uu.nl/~swier004/publications/2010-fundamentae-informatica.pdf
saved 2025-06-06

Multi-population GAN Training: Analyzing Co-Evolutionary Algorithms
Walter P. Casas, Jamal Toutouh
https://arxiv.org/abs/2507.13157 https://

Multi-population GAN Training: Analyzing Co-Evolutionary Algorithms
Generative adversarial networks (GANs) are powerful generative models but remain challenging to train due to pathologies suchas mode collapse and instability. Recent research has explored co-evolutionary approaches, in which populations of generators and discriminators are evolved, as a promising solution. This paper presents an empirical analysis of different coevolutionary GAN training strategies, focusing on the impact of selection and replacement mechanisms. We compare (mu,lambda), (mu+lamb…

Universal parameters of the $\Lambda(1380)$, the $\Lambda(1405)$ and their isospin partners from a combined analysis of Lattice QCD and experimental results
Ferenc Pittler, Maxim Mai, Ulf-G. Mei{\ss}ner, Ryan F. Ferguson, Peter Hurck, David G. Ireland, Bryan McKinnon
https://arxiv.org/abs/2507.14283

Universal parameters of the $Λ(1380)$, the $Λ(1405)$ and their isospin partners from a combined analysis of Lattice QCD and experimental results
We perform a global analysis of lattice and experimental data on negative-strangeness meson-baryon scattering using a large set of variations of the theoretical framework based on the Chiral Unitary Approach. For the former, the Lüscher formalism is utilized taking into account all pertinent coupled-channel effects. Through this, systematic uncertainties related to data scarcity, potential ambiguities, and possible framework dependence are quantified for the first time. The implementation of i…

Congruence conditions for the mod $\lambda$ values of the Fourier coefficients of classical eigenforms
Michael A. Daas
https://arxiv.org/abs/2506.08865 htt…

Congruence conditions for the mod $λ$ values of the Fourier coefficients of classical eigenforms
We classify all instances of the condition $a_{p}(f) \equiv x \bmod λ$ being related to a congruence on the prime $p$, where $a_{p}(f)$ denotes the $p$th Fourier coefficient of a classical normalised cuspidal eigenform $f$ and $λ$ is a prime in the number field generated by the Fourier coefficients of $f$. This classification is done in terms of the (projective) image of the mod $λ$ Galois representation associated with $f$ and extends work by Swinnerton-Dyer. We highlight that for $x = 0$, …

Insights for Early Massive Black Hole Growth from JWST Detection of the [Ne v] {\lambda}3427 Emission Line
Benny Trakhtenbrot, Claudio Ricci, Ezequiel Treister, Michael J. Koss, Richard Mushotzky, Kyuseok Oh, Alessandro Peca, Franz E. Bauer, Kriti Kamal Gupta, Tomer Reiss
https://arxiv.org/abs/2507.10681

Insights for Early Massive Black Hole Growth from JWST Detection of the [Ne v] λ3427 Emission Line
We use the narrow [Ne v] $λ$3427 emission line detected in the recently published JWST spectra of two galaxies, at z = 6.9 and 5.6, to study the key properties of the active galactic nuclei (AGN) and the supermassive black holes in their centers. Using a new empirical scaling linking the [Ne v] line emission with AGN accretion-driven (continuum) emission, derived from a highly complete low-redshift AGN sample, we show that the [Ne v] emission in the two z > 5 galaxies implies total (bolometric…

New Blog - Boot a VM in 3 Seconds
Woof. This made my brain hurt over a few weeks between delighting customers, but I persevered.
Firecracker is the tiny, lightweight VM technology behind AWS Lambda "serverless" Function as a Service. You can run these tiny, tiny, fast VMs on-premises if that solves a business problem.
Anyway, here is an actual working tutorial that I wrote as most of the major tutorials out there did not work for me. Enjoy.

GitHub - DennisFaucher/firecracker: Learning Firecracker "Serverless" MicroVMs
Learning Firecracker "Serverless" MicroVMs. Contribute to DennisFaucher/firecracker development by creating an account on GitHub.

Precise Measurement of the $\Lambda$ Electric Dipole Moment through the Entangled Strange Baryon-Antibaryon System
BESIII Collaboration
https://arxiv.org/abs/2506.19180

Precise Measurement of the $Λ$ Electric Dipole Moment through the Entangled Strange Baryon-Antibaryon System
The dominance of matter over antimatter in the universe has consistently driven the pursuit of new physics beyond the Standard Model that violates charge-parity symmetry. Unlike the well-constrained electrons and neutrons, strange baryons (hyperons) remain a largely unexplored territory, in which interactions between hyperons and particles from new physics could induce a non-trivial electric dipole moment (EDM). However, direct measurements of hyperon EDMs through spin precession are highly cha…

Analysis of the hidden-charm pentaquark candidates in the $J/\psi \Lambda$ mass spectrum via the QCD sum rules
Zhi-Gang Wang, Qi Xin
https://arxiv.org/abs/2508.17373 https://

Analysis of the hidden-charm pentaquark candidates in the $J/ψΛ$ mass spectrum via the QCD sum rules
In this work, we distinguish the isospin for the first time and study the diquark-diquark-antiquark type $udsc\bar{c}$ pentaquark states with zero isospin via the QCD sum rules systematically. We distinguish contributions of the pentaquark states with negative parity from positive parity unambiguously and obtain clean QCD sum rules for the pentaquark states with negative parity. Then we adopt the modified energy scale formula to choose the optimal energy scales of the QCD spectral densities, an…

Constraining parameters of spinor field dark energy: An alternative to $\Lambda$CDM model under the spherically symmetric FLRW space-time
Bijan Saha, Mahendra Goray
https://arxiv.org/abs/2506.16323

Constraining parameters of spinor field dark energy: An alternative to $Λ$CDM model under the spherically symmetric FLRW space-time
This study constrains the cosmological parameters within the scope of a spherically symmetric FLRW cosmological model, the role of a nonlinear spinor field in the universe's evolution. To test this approach, we incorporate the recent Cosmic chronometers, Supernova, and Sloan Digital Sky Survey data. It is found that if spherical coordinates give the FLRW model, the energy-momentum tensor (EMT) of the spinor field possesses nontrivial non-diagonal components. These non-diagonal components of EMT…

Comparison of $R_h=ct$ and $\Lambda$CDM using DESI DR1 measurements
Kunj Panchal, Shantanu Desai
https://arxiv.org/abs/2506.18445 https://

Comparison of $R_h=ct$ and $Λ$CDM using DESI DR1 measurements
We use DESI DR1 BAO measurements of the ratio of tranvserse comoving distance to Hubble distance in order to test the compatibility of $R_h=ct$ over flat $Λ$CDM. For this purpose, we used Bayesian model selection to evaluate the efficacy of these models given the observed data. When we consider the BAO measurements up to redshift of 1.3, both models are equally favored. However, when we consider the Lyman-$α$ QSO measurement at redshift of 2.33, we find Bayes factors of greater than 100 for f…

Spin correlations and Bell nonlocality in $\Lambda\bar\Lambda$ pair production from $e^ e^-$ collisions with a thrust cut
Shi-Jia Lin, Ming-Jun Liu, Ding Yu Shao, Shu-Yi Wei
https://arxiv.org/abs/2507.15387

Spin correlations and Bell nonlocality in $Λ\barΛ$ pair production from $e^+e^-$ collisions with a thrust cut
We present a comprehensive theoretical study of spin correlations in $Λ\barΛ$ production from $e^+e^-$ annihilation, providing the theoretical predictions for the Belle II experiment. Using soft-collinear effective theory, we perform the first resummation of large logarithms for the longitudinal ($C_{LL}$) and transverse ($C_{TT}$) spin correlations for events with a cut on the thrust variable. Our calculation achieves next-to-next-to-leading logarithmic accuracy and incorporates the determin…

First observation of the charmless baryonic decay $B^ \to\bar{\Lambda}p\bar{p}p$
LHCb collaboration, et al.
https://arxiv.org/abs/2508.16259 https://arxiv.…

First observation of the charmless baryonic decay $B^+\to\barΛp\bar{p}p$
A search for the charmless baryonic decay $B^+\to \barΛ p\bar{p}p$ is performed using proton-proton collision data recorded by the LHCb experiment, corresponding to an integrated luminosity of 5.4~$\text{fb}^{-1}$. The branching fraction for this decay is measured for the first time relative to that of the topologically similar decay $B^+\to J/ψK^+$, with $J/ψ\to \barΛ p K^-$. The branching fraction is measured to be \mbox{$\mathcal{B}(B^+\to \barΛ p\bar{p}p) = (2.08 \pm 0.34 \pm 0.12 \pm …

Structure of hypernucleus $_{\Lambda}^{7}$Li within microscopic three-cluster model
N. K. Kalzhigitov, S. Amangeldinova, V. S. Vasilevsky
https://arxiv.org/abs/2508.13702 https:…

Structure of hypernucleus $_Λ^{7}$Li within microscopic three-cluster model
The structure of bound and resonance states of the hypernucleus $_Λ^{7}$Li is studied within a three-cluster model. This nucleus is considered a three-cluster structure consisting of $^{4}$He, a deuteron, and a lambda hyperon. The chosen three-cluster configuration allows us to describe more accurately the structure of hypernucleus $_Λ^{7}$Li and the dynamics of different processes that involve interactions of lightest nuclei and hypernuclei. The main goal of the present investigations is to …

Revisiting the $\Lambda_c^ \to \Lambda \eta \pi^ $ and the roles of intermediate resonances
En Wang, Wen-Tao Lyu, Man-Yu Duan, Chu-Wen Xiao, Dian-Yong Chen, Ju-Jun Xie, Eulogio Oset
https://arxiv.org/abs/2507.13738

Revisiting the $Λ_c^+\to Ληπ^+$ and the roles of intermediate resonances
In this paper, we first review the theoretical and experimental studies of the process $Λ_c^+ \to π^+ ηΛ$. Motivated by the recent BESIII and Belle measurements, we have conducted a theoretical study of the process $Λ_c^+ \to π^+ ηΛ$, where the $a_0(980)$ and $Λ(1670)$ resonances are dynamically generated from the $S$-wave meson meson and meson baryon interaction, respectively. Our results give a reasonable description of the invariant mass distributions, which implies that the spin fl…

Encoding call-by-push-value in the pi-calculus
Benjamin Bennetzen, Nikolaj Rossander Kristensen, Peter Buus Steffensen
https://arxiv.org/abs/2506.10584 htt…

Encoding call-by-push-value in the pi-calculus
In this report we define an encoding of Levys call-by-push-value lambda-calculus (CBPV) in the pi-calculus, and prove that our encoding is both sound and complete. We present informal (by-hand) proofs of soundness, completeness, and all required lemmas. The encoding is specialized to the internal pi-calculus (pi-i-calculus) to circumvent certain challenges associated with using de Bruijn index in a formalization, and it also helps with bisimulation as early-, late- and open-bisimulation coincid…

BASS. XLIX. Characterization of highly luminous and obscured AGNs: local X-ray and [NeV]$\lambda$3426 emission in comparison with the high-redshift Universe
Alessandro Peca, Michael J. Koss, Kyuseok Oh, Claudio Ricci, Benny Trakhtenbrot, Richard Mushotzky, Ezequiel Treister, C. Megan Urry, Andrealuna Pizzetti, Kohei Ichikawa, Alessia Tortosa, Federica Ricci, Matilde Signorini, Darshan Kakkad, Chin-Shin Chang, Giovanni Mazzolari, Turgay Caglar, Macon Magno, Ignacio del Moral-Castro, Pet…

BASS. XLIX. Characterization of highly luminous and obscured AGNs: local X-ray and [NeV]$λ$3426 emission in comparison with the high-redshift Universe
We present a detailed analysis of the most luminous and obscured Active Galactic Nuclei (AGNs) detected in the ultra-hard X-ray band (14-195 keV) by Swift/BAT. Our sample comprises 21 X-ray luminous (log $L_X/{\rm erg\,s^{-1}}>44.6$, 2-10 keV) AGNs at $z<0.6$, optically classified as Seyfert 1.9-2. Using NuSTAR, XMM-Newton, Suzaku, and Chandra, we constrain AGN properties such as absorption column density $N_H$, photon index $Γ$, intrinsic $L_X$, covering factor, and iron K$α$ equivalent widt…

Replaced article(s) found for cs.PL. https://arxiv.org/list/cs.PL/new
[1/1]:
- Ohana trees and Taylor expansion for the $\lambda$I-calculus. No variable gets left behind or for...
R\'emy Cerda, Giulio Manzonetto, Alexis Saurin

Measurement of transverse $\Lambda$ and $\bar{\Lambda}$ hyperon polarization in $p$Pb collisions at $\sqrt{s_{NN}} = 5.02$ TeV
LHCb collaboration, et al.
https://arxiv.org/abs/2508.02009

Measurement of transverse $Λ$ and $\barΛ$ hyperon polarization in $p$Pb collisions at $\sqrt{s_{NN}} = 5.02$ TeV
The transverse polarization of $Λ$ and $\barΛ$ hyperons is measured in $p$Pb collisions collected by the LHCb experiment at a nucleon-nucleon center-of-mass energy of $5.02 $ TeV. The polarization is averaged over hyperon transverse momentum in the range $0.15 < p_{T} < 6.00 $ GeV/$c$, and Feynman-$x$ in the ranges $0.005 < x_{F} < 0.040$ (forward region) and $-0.10 < x_{F} < -0.01$ (backward region) defined relative to the proton beam direction. The transverse polarization is found to be com…

Forecast constraints on null tests of the $\Lambda$CDM model with SPHEREx
Alejandro Mata Rom\'an, Indira Ocampo, Savvas Nesseris
https://arxiv.org/abs/2507.16604

Forecast constraints on null tests of the $Λ$CDM model with SPHEREx
In this work we quantify the ability of the upcoming SPHEREx survey to constrain cosmological observables and test the internal consistency of the cosmological constant and cold dark matter ($Λ$CDM) model. Using Fisher matrix forecasting, we assess the expected precision on Baryon Acoustic Oscillations (BAO) observables, such as the angular diameter distance $D_\mathrm{A}(z)$ and the Hubble parameter $H(z)$. We further explore SPHEREx's potential to probe some of the fundamental assumptions of…

Unraveling the structure of $\Lambda$ hyperons with polarized $\Lambda\bar{\Lambda}$ pairs
The BESIII Collaboration
https://arxiv.org/abs/2506.08072 https:…

Unraveling the structure of $Λ$ hyperons with polarized $Λ\barΛ$ pairs
With data collected in a dedicated off-resonance scan within the center-of-mass energy range of 2.3864$-$3.0800 GeV, the BESIII collaboration provides the first complete energy-dependent measurements of the $Λ$ electromagnetic form factors in the time-like region. By combining double-tag and single-tag events from the $e^+e^- \to Λ\barΛ \to pπ^-\bar{p}π^+$ reaction, we achieve a complete decomposition of the spin structure of the reaction at five energy points, with high statistical and sy…

Analysis of the semileptonic decays $\Lambda_b\to\Lambda_cl\bar{\nu}_l$ and $\Xi_b\to\Xi_cl\bar{\nu}_l$ in QCD sum rules
Jie Lu, Guo-Liang Yu, Dian-Yong Chen, Zhi-Gang Wang, Bin Wu
https://arxiv.org/abs/2508.11900

Analysis of the semileptonic decays $Λ_b\toΛ_cl\barν_l$ and $Ξ_b\toΞ_cl\barν_l$ in QCD sum rules
In this article, the electroweak transition form factors of $Λ_b\toΛ_c$ and $Ξ_b\toΞ_c$ are analyzed within the framework of three-point QCD sum rules. In phenomenological side, all possible couplings of interpolating current to hadronic states are considered. In QCD side, the perturbative part and the contributions of vacuum condensates up to dimension 8 are also considered. With the calculated form factors, we study the decay widths and branching ratios of semileptonic decays $Λ_b\toΛ_c…

HeII emitters in the cosmic noon and beyond. Characterising the HeII {\lambda}1640 emission with MUSE and JWST/NIRSpec
R. Gonz'alez-D'iaz, J. M. V\'ilchez, C. Kehrig, I. del Moral-Castro, J. Iglesias-P\'aramo
https://arxiv.org/abs/2506.11685

HeII emitters in the cosmic noon and beyond. Characterising the HeII λ1640 emission with MUSE and JWST/NIRSpec
The study of high-redshift galaxies provides critical insights into the early stages of cosmic evolution, particularly during the so-called 'cosmic noon', when star formation activity reached its peak. Within this context, the origin of the nebular emission remains an open question. In this work, we conduct a systematic, multi-wavelength investigation of a sample of z ~ 2-4 emitters from the MUSE Hubble Ultra Deep Field surveys, utilising both MUSE and JWST/NIRSpec data and extending the sample…

Revisit the diquark of $\Lambda_c$ in the $\Lambda_c\to \Lambda K^ $ and $\Lambda_c\to \Sigma^0 K^ $ processes
Peng-Yu Niu, Qian Wang, Qiang Zhao
https://arxiv.org/abs/2507.04393 …

Revisit the diquark of $Λ_c$ in the $Λ_c\to ΛK^+$ and $Λ_c\to Σ^0 K^+$ processes
The spatial distributions of $[ud]$ diquark and heavy-light diquark of the SU(3)-flavor antitriplet charmed baryons are investigated by the two singly Cabibbo-suppressed hadronic weak decays, $Λ_c\to ΛK^+$ and $Λ_c\to Σ^0 K^+$ within the nonrelativistic constituent quark model. The above two spatial distributions are reflected by the two parameters $α_ρ$ and $α_λ$, which are the harmonic oscillator strength parameters of the charmed baryons. These two parameters obtain strong constraint…

Measurement of the branching fractions of the Cabibbo-favored decays $\Lambda_{c}^{ }\to\Lambda K_{S}^{0}K^{ }$ and $\Lambda_{c}^{ }\to\Xi^{0}K_{S}^{0}\pi^{ }$ and search for $\Lambda_{c}^{ }\to\Sigma^{0} K_{S}^{0}K^{ }$
BESIII Collaboration, et al.
https://arxiv.org/abs/2506.02969

Measurement of the branching fractions of the Cabibbo-favored decays $Λ_{c}^{+}\toΛK_{S}^{0}K^{+}$ and $Λ_{c}^{+}\toΞ^{0}K_{S}^{0}π^{+}$ and search for $Λ_{c}^{+}\toΣ^{0} K_{S}^{0}K^{+}$
Based on $e^{+}e^{-}$ collision data corresponding to an integrated luminosity of about 4.5 fb$^{-1}$ collected at center-of-mass energies between 4599.53 MeV and 4698.82 MeV with the BESIII detector, the absolute branching fraction of the Cabibbo-favored decay $Λ_{c}^{+}\toΛK_{S}^{0}K^{+}$ is measured to be $(3.12\pm0.46\pm0.15)\times10^{-3}$. Combined with a previous measurement from the BESIII Collaboration, the branching fraction of the decay $Λ_{c}^{+}\toΛK_{S}^{0}K^{+}$ is calculated …

Reanalyzing DESI DR1: 1. $\Lambda$CDM Constraints from the Power Spectrum and Bispectrum
Anton Chudaykin, Mikhail M. Ivanov, Oliver H. E. Philcox
https://arxiv.org/abs/2507.13433 …

Reanalyzing DESI DR1: 1. $Λ$CDM Constraints from the Power Spectrum and Bispectrum
We present the first independent re-analysis of the galaxy clustering data from DESI Data Release 1, utilizing an effective field theory (EFT)-based full-shape model. We analyze the power spectra and bispectra of the public catalogs using a custom-built pipeline based on window-deconvolved quasi-optimal estimators, carefully accounting for all relevant systematic effects. Compared to the official collaboration analysis, we add the galaxy power spectrum hexadecapole and the bispectrum monopole, …

Observation of the electromagnetic radiative decays of the \boldmath{$\Lambda(1520)$} and \boldmath{$\Lambda(1670)$} to \boldmath{$\gamma\Sigma^0$}
BESIII Collaboration, et al.
https://arxiv.org/abs/2507.11145

Observation of the electromagnetic radiative decays of the \boldmath{$Λ(1520)$} and \boldmath{$Λ(1670)$} to \boldmath{$γΣ^0$}
Using $(10087\pm 44)\times10^6$ $J/ψ$ events collected with the BESIII detector, we report the first observation of the electromagnetic radiative decays of the $Λ(1520)$ and $Λ(1670)$ to $γΣ^0$, with a statistical significance of $16.6σ$ and $23.5σ$, respectively. The ratio of the branching fractions $\frac{\mathcal{B}(Λ(1520)\toγΛ)}{\mathcal{B}(Λ(1520)\toγΣ^0)}$ is determined to be $2.88\pm0.27(\text{stat.})\pm0.21(\text{syst.})$, which is in good agreement with flavor SU(3) symme…

A spherical hydrodynamical model of cosmic voids in {\Lambda}CDM and beyond
Tommaso Moretti, Giovanni Verza, Noemi Frusciante, Franceso Pace
https://arxiv.org/abs/2507.14120

A spherical hydrodynamical model of cosmic voids in ΛCDM and beyond
Cosmic voids have emerged as powerful probes for cosmology, providing complementary information on the large-scale structure of the universe. We present the first application of a hydrodynamical framework to model the evolution of cosmic voids. This approach offers a physically intuitive characterization of void dynamics and can naturally be applied to non-standard cosmologies. We derive the cosmology-dependent mapping that relates the linear (Lagrangian) and fully non-linear (Eulerian) evoluti…

Dynamical dark energy in models close to $\Lambda$CDM
Saikat Chakraborty, Charlotte Louw, Peter K. S. Dunsby, Kelly MacDevette, Alvaro de la Cruz Dombriz
https://arxiv.org/abs/2508.09813

Dynamical dark energy in models close to $Λ$CDM
In this communication we address whether or not there is an equivalence between the kinematical and dynamical descriptions of the spatially flat $Λ$CDM model. We address this by investigating whether an almost $Λ$CDM expansion history ($j(z)\approx1$) corresponds to an almost $Λ$CDM model ($w_{\rm DE}(z)\approx-1$) by considering two particular explicit examples. At least for the cases considered, this turns out not to be the case. Instead, what we find is that an almost $Λ$CDM cosmic evolu…

Constraining Dark Matter Parameters in the Lambda-CDM Framework: A Bayesian Comparison of Planck and DES Constraints
Manjeet Kunwar, Nabin Bhusal, Manil Khatiwada, Niraj Dhital
https://arxiv.org/abs/2506.07133

Constraining Dark Matter Parameters in the Lambda-CDM Framework: A Bayesian Comparison of Planck and DES Constraints
We present a Bayesian analysis of cosmological parameter constraints from early- and late-universe observations, focusing on the matter density parameter ($Ω_m$) and the amplitude of matter fluctuations ($σ_8$) within the $Λ$CDM framework. Using data from the Planck 2018 satellite mission and the Dark Energy Survey (DES) Year 3, we compute theoretical predictions for angular and matter power spectra via Boltzmann solvers and perform Markov Chain Monte Carlo (MCMC) sampling using the \texttt{…

Final state interaction in the $\Lambda_b\to D^ D^- \Lambda,~D^0D_s^- p,~D_s^ D_s^-\Lambda$ reactions
Jing Song, Melahat Bayar, Eulogio Oset
https://arxiv.org/abs/2507.01865

Final state interaction in the $Λ_b\to D^+D^- Λ,~D^0D_s^- p,~D_s^+D_s^-Λ$ reactions
We study the three-body decays \(Λ_b \to D^+ D^- Λ,~D^0D_s^- p,~D_s^+D_s^-Λ\), considering both internal and external emission mechanisms that produce various meson-baryon final states. Using a unitarized coupled-channel approach based on the local hidden gauge formalism, we analyze final state interactions in the exotic anticharm systems with strangeness \(S=-1\) and \(S=-2\). Significant threshold enhancements appear in both pseudoscalar and vector meson-baryon channels, indicating strong …

Revisiting $\Lambda$CDM extensions in light of re-analyzed CMB data
Jacobo Asorey, Javier de Cruz P\'erez
https://arxiv.org/abs/2506.13537 https://

Revisiting $Λ$CDM extensions in light of re-analyzed CMB data
In the last years with the increasing precision in cosmological observations we have been able to establish an standard model of cosmology, the so-called $Λ$CDM, but also find some tensions between cosmological probes that are difficult to explain within the context of this model. We tested several phenomenological extensions of the $Λ$CDM with the newest datasets from the chain CMB+BAO+SNIa, to see whether they are able to alleviate the aforementioned tensions. We find that when the updated …

The Production and Decay Dynamics of the Charmed Baryon $\Lambda_c^ $ in $e^ e^-$ Annihilations near Threshold
BESIII Collaboration
https://arxiv.org/abs/2508.11400 https://

The Production and Decay Dynamics of the Charmed Baryon $Λ_c^+$ in $e^+e^-$ Annihilations near Threshold
The study of the charmed baryons is crucial for investigating the strong and weak interactions in the Standard Model and for gaining insights into the internal structure of baryons. In an $e^+e^-$ experiment the lightest charmed baryon, $Λ_c^+$, can be produced in pairs through the single photon annihilation process. This process can be described by two complex electromagnetic form factors. The presence of a non-zero relative phase between these form factors gives rise to a transverse polariza…

Prospects for $P$ and $C\!P$ violation in $\Lambda_{c}^{ }$ decays with polarized beam at Super Tau-Charm Facility
Hong-Jian Wang, Cheng Wang, Hao Sun, Pei-Rong Li, Xiao-Rui Lyu, Rong-Gang Ping
https://arxiv.org/abs/2508.12217

Prospects for $P$ and $C\!P$ violation in $Λ_{c}^{+}$ decays with polarized beam at Super Tau-Charm Facility
Weak decays of the charmed baryons offer an ideal platform to study parity ($P$) and charge conjugation-parity ($C\!P$) violation in quark sector, to stringently test the Standard Model and search for new physics. It is a key goal in the next-generation positron-electron collider, such as the Super Tau-Charm Facility (STCF). Thanks to the quantum-entangled pair production with super high luminosity and the possibility of beam polarization, STCF provides a unique environment to probe such symmet…

Electromagnetic probes revealing the inner structure of the $\Lambda_c(2940)$
Ping Chen, Zi-Le Zhang, Yu Zhuge
https://arxiv.org/abs/2506.15428 https://

Electromagnetic probes revealing the inner structure of the $Λ_c(2940)$
The $Λ_c(2940)$, an open-charm baryon discovered in 2006, has sparked interest due to its ``low mass puzzle'', paralleling the $X(3872)$ in the charmoniumlike sector. Both states challenge conventional hadronic interpretations, with the $X(3872)$ understood as a $D^*\bar{D}$ molecular state and the $Λ_c(2940)$ hypothesized as a $D^*N$ molecular state. This work investigates the radiative decay modes $Λ_c(2940) \to Λ_c(2286)γ$, $Λ_c(2940) \to Λ_c(2595)γ$, and $Λ_c(2940) \to Λ_c(2765)γ…

$\Lambda_b \to \Lambda^{(\ast)}\nu\bar{\nu}$ decays and the recent Belle-II $B^ \to K^ \nu\bar{\nu}$ data
Diganta Das, Dargi Shameer, Ria Sain
https://arxiv.org/abs/2507.01863

$Λ_b \to Λ^{(\ast)}ν\barν$ decays and the recent Belle-II $B^+\to K^+ν\barν$ data
The Belle-II experiment has recently reported the first measurement of $B^+ \to K^+ ν\barν$ decay which exceeds the Standard Model prediction by approximately 2.7$σ$. The deviation may indicate the presence of new physics beyond the Standard Model in the $b\to sν\barν$ sector. Under this assumption, we study the hadronic $Λ_b \to Λ(\to pπ)ν\barν$ and $Λ_b \to Λ^\ast(\to N\!\bar{K})ν\barν$ decays within both the Standard Model and beyond. We work in a low energy effective field the…

Replaced article(s) found for hep-ph. https://arxiv.org/list/hep-ph/new
[2/2]:
- Challenging $\Lambda$CDM: 5$\sigma$ Evidence for a Dynamical Dark Energy Late-Time Transition
Mateus Scherer, Miguel A. Sabogal, Rafael C. Nunes, Antonio De Felice

Replaced article(s) found for hep-ph. https://arxiv.org/list/hep-ph/new
[2/2]:
- Revisiting the $\Lambda_c^ \to \Lambda \eta \pi^ $ and the roles of intermediate resonances
En Wang, Wen-Tao Lyu, Man-Yu Duan, Chu-Wen Xiao, Dian-Yong Chen, Ju-Jun Xie, Eulogio Oset

Dark energy and QCD instanton vacuum in Friedmann-Lemaitre-Robertson-Walker universe
M. M. Musakhanov
https://arxiv.org/abs/2506.13128 https://

Dark energy and QCD instanton vacuum in Friedmann-Lemaitre-Robertson-Walker universe
The standard model of the universe, lambdaCDM, is based on the Friedmann-Lemaitre-Robertson-Walker metric with flat 3-dim coordinate space and Friedmann equations. The cosmological constant lambda is providing the cancellations of the matter fields contributions in the flat space. The dynamical dark energy is appearing on over of the vacuum energy of matter fields at the flat space. Within the Standard Model the gluon Yang-Mills (YM) fields are playing the special role since specific properties…