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Ultimi arrivi:
2025-11-11
05:27
Large-Scale Structure Probes of the Post-Inflationary Axiverse / Gorghetto, Marco (DESY) ; Trifinopoulos, Sokratis (CERN ; Zurich U.) ; Valogiannis, Georgios (Chicago U. ; Chicago U., KICP)
We study the cosmology of axions in the post-inflationary scenario, where random initial conditions and the ensuing string-domain-wall network generate an isocurvature power spectrum. [...]
DESY-25-147 ; CERN-TH-2025-193 ; arXiv:2511.04734.
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2025-11-11
05:23
The $Zα^2$ correction to superallowed beta decays in effective field theory and implications for $|V_{ud}|$ / Cao, Zehua (Kentucky U.) ; Hill, Richard J. (Kentucky U. ; Fermilab) ; Plestid, Ryan (Caltech ; CERN) ; Vander Griend, Peter (Kentucky U. ; Fermilab)
Superallowed ($0^+\rightarrow0^+$) beta decays currently provide the most precise extraction of quark mixing in the Standard Model. [...]
FERMILAB-PUB-25-0773-T ; CALT-TH-2025-032 ; CERN-TH-2025-20 ; arXiv:2511.05446.
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2025-11-11
04:30
Fast and Flexible Neutrino Decoupling Part I: The Standard Model / Escudero, M. (CERN) ; Jackson, G. (SUBATECH, Nantes) ; Laine, M. (U. Bern (main)) ; Sandner, S. (Los Alamos)
Cosmological determinations of the number of relativistic neutrino species, $N^{ }_{\rm eff}$, are becoming increasingly accurate, and further improvements are expected both from CMB and BBN data. [...]
LA-UR-25-30442 ; CERN-TH-2025-225 ; arXiv:2511.04747.
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2025-11-06
04:15
The Price of a Large Electron Yukawa Modification / Allwicher, Lukas (DESY) ; McCullough, Matthew (CERN) ; Renner, Sophie (Glasgow U.) ; Rocha, Duncan (CERN ; Fermilab ; U. Chicago (main)) ; Smith, Benjamin (Glasgow U.)
The theoretical implications of an electron Yukawa modification are considered in the context of a possible Higgs pole run at FCC-ee, aimed at bounding this coupling. [...]
CERN-TH-2025-201 ; DESY-25-142 ; arXiv:2511.02642.
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2025-11-06
04:13
Near-extremal membranes in M-theory / Buchel, Alex (Western Ontario U.) ; Monten, Ruben (CERN)
We consider near-extremal membranes embedded in M-theory, consistently truncated to gauged $\mathcal{N} = 2$ supergravity in four dimensions on the coset space $M^{1,1,0}$. [...]
CERN-TH-2025-224 ; arXiv:2511.01974.
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2025-11-06
04:13
Hadronic scattering in (1+1)D SU(2) lattice gauge theory from tensor networks / Barata, João (CERN) ; Hormaza, Juan (Colombia, U. Natl.) ; Kang, Zhong-Bo (UCLA) ; Qian, Wenyang (Santiago de Compostela U., IGFAE)
We present a first real-time study of hadronic scattering in a (1+1)-dimensional SU(2) lattice gauge theory with fundamental fermions using tensor-network techniques. [...]
CERN-TH-2025-214 ; arXiv:2511.00154.
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2025-11-05
04:14
Nucleosynthesis and CMB bounds on photophilic ALPs: a fresh look / Escudero, Miguel (CERN) ; Garcia-Perez, Clara (CERN ; Zaragoza U.) ; Ovchynnikov, Maksym (CERN)
We provide a fresh look at the cosmological constraints on axion-like particles (ALPs) that couple predominantly to photons, focusing on lifetimes $τ_{a} \lesssim 10^{4}\, {\rm s}$ and masses $m_a\lesssim 10\,{\rm GeV}$. [...]
CERN-TH-2025-222 ; arXiv:2511.00157.
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2025-11-05
04:11
opbasis - a Python package to derive minimal operator bases / Husung, Nikolai (CERN ; Madrid, IFT ; Madrid, Autonoma U.)
Finding a complete and yet minimal on-shell basis of operators of a given mass-dimension that are compatible with a specific set of transformation properties is the first step in any Effective Field Theory description. [...]
CERN-TH-2025-223 ; IFT-UAM/CSIC-25-138 ; arXiv:2511.00165.
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2025-11-05
04:02
Precision lattice calculation of the hadronic contribution to the running of the electroweak gauge couplings / Conigli, Alessandro (Helmholtz Inst., Mainz ; Darmstadt, GSI) ; Djukanovic, Dalibor (Helmholtz Inst., Mainz ; Darmstadt, GSI) ; von Hippel, Georg (U. Mainz, PRISMA) ; Kuberski, Simon (CERN) ; Meyer, Harvey B. (Helmholtz Inst., Mainz ; U. Mainz, PRISMA ; CERN) ; Miura, Kohtaroh (KEK, Tsukuba) ; Ottnad, Konstantin (U. Mainz, PRISMA) ; Risch, Andreas (Wuppertal U.) ; Wittig, Hartmut (Helmholtz Inst., Mainz ; Darmstadt, GSI ; U. Mainz, PRISMA)
We present an update of our lattice QCD determination of the hadronic contribution to the running of the electromagnetic coupling, $Δα_{\mathrm{had}}^{(5)}(-Q^2)$, and of the electroweak mixing angle in the space-like momentum region up to $Q^2=12\ \mathrm{GeV}^2$. [...]
CERN-TH-2025-216 ; MITP-25-069 ; KEK-TH-2771 ; arXiv:2511.01623.
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2025-11-04
04:19
Efficient evaluation of the dark-matter two-loop power spectrum in the EFT of LSS / Anastasiou, Charalampos (Zurich, ETH) ; Favorito, Andrea (Zurich, ETH) ; Lewandowski, Matthew (CERN) ; Senatore, Leonardo (Zurich, ETH) ; Zheng, Henry (Stanford U., ITP)
Rapid progress in cosmological Large Scale Structure (LSS) surveys motivates precise theoretical predictions. [...]
arXiv:2509.05187 ; CERN-TH-2025-171.
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