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CERN Theory

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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. - 42.
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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. - 38.
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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. - 17.
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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. - 8.
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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. - 23.
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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. - 59.
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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. - 75.
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2025-11-04
04:14
Towards a topological data analysis for heavy-ion collisions / Capellino, Federica (Darmstadt, GSI) ; Dubla, Andrea (Darmstadt, GSI) ; Masciocchi, Silvia (Darmstadt, GSI ; Heidelberg U.) ; Nijs, Govert (CERN) ; Spitz, Daniel (Leipzig, Max Planck Inst.)
The collective expansion of the quark-gluon plasma (QGP) created in heavy-ion collisions suggests that geometry-inspired approaches can be useful in extracting information about the QGP. [...]
arXiv:2509.02339 ; CERN-TH-2025-168. - 15.
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2025-11-04
04:07
Can galactic magnetic fields diffuse into the voids? / Ghosh, Oindrila (Stockholm U., OKC) ; Brandenburg, Axel (Royal Inst. Tech., Stockholm ; Stockholm U., OKC ; Carnegie Mellon U. ; Ilia State U.) ; Caprini, Chiara (CERN ; U. Geneva (main)) ; Neronov, Andrii (APC, Paris ; LASTRO Observ.) ; Vazza, Franco (U. Bologna, DIFA)
Cosmic voids are magnetized at the level of at least $10^{-17}$ G on Mpc scales, as implied by blazar observations. [...]
NORDITA-2025-055 ; CERN-TH-2025-219 ; arXiv:2510.26918. - 14.
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2025-11-04
04:06
WallGo investigates: Theoretical uncertainties in the bubble wall velocity / van de Vis, Jorinde (CERN) ; Schicho, Philipp (U. Geneva (main)) ; Niemi, Lauri (Espoo, Sci. Computing Ctr.) ; Laurent, Benoit (McGill U. ; Perimeter Inst. Theor. Phys.) ; Hirvonen, Joonas (U. Nottingham) ; Gould, Oliver (U. Nottingham)
We examine theoretical uncertainties in state-of-the-art calculations of the bubble wall velocity during first-order cosmological phase transitions. [...]
arXiv:2510.27691 ; CERN-TH-2025-221. - 55.
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