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CERN Accelerating science

CERN Theory

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2025-05-29
04:35
The anomalous magnetic moment of the muon in the Standard Model: an update / Aliberti, R. (Mainz U., Inst. Phys. ; U. Mainz, PRISMA) ; Aoyama, T. (Tokyo U., ISSP) ; Balzani, E. (INFN, Padua ; Padua U.) ; Bashir, A. (IFM-UMSNH, Michoacan ; Escuela Poli. Sup. U., Huelva) ; Benton, G. (Illinois U., Urbana) ; Bijnens, J. (Lund U.) ; Biloshytskyi, V. (Mainz U., Inst. Phys. ; U. Mainz, PRISMA) ; Blum, T. (Connecticut U. ; RIKEN BNL) ; Boito, D. (Sao Paulo U., Sao Carlos) ; Bruno, M. (Milan Bicocca U. ; INFN, Milan Bicocca) et al.
We present the current Standard Model (SM) prediction for the muon anomalous magnetic moment, $a_\mu$, updating the first White Paper (WP20) [1]. [...]
CERN-TH-2025-101 ; FERMILAB-PUB-25-0344-T ; INT-PUB-25-015 ; KEK Preprint 2025-22 ; LTH 1403 ; MITP-25-037 ; UWThPh 2025-15 ; ZU-TH 37/25 ; IPARCOS-UCM-25-029 ; arXiv:2505.21476.
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2025-05-24
04:08
Cobordism Utopia: U-Dualities, Bordisms, and the Swampland / Braeger, Noah (Pennsylvania U., Dept. Math.) ; Debray, Arun (U. Kentucky, Lexington) ; Dierigl, Markus (CERN) ; Heckman, Jonathan J. (Pennsylvania U., Dept. Math. ; Pennsylvania U.) ; Montero, Miguel (Madrid, IFT)
The U-dualities of maximally supersymmetric supergravity theories lead to celebrated non-perturbative constraints on the structure of quantum gravity. [...]
CERN-TH-2025-103 ; IFT-025-51 ; arXiv:2505.15885.
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2025-05-22
04:46
Building Next-to-Next Leading Logarithmic parton showers: the PanScales recipe / Ferrario Ravasio, Silvia (CERN)
Parton showers lie at the core of Shower Monte Carlo event generators, the default theoretical tools used to interpret collider data. [...]
arXiv:2505.13395 ; CERN-TH-2025-102.
- 2025-05-19 - 4.
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2025-05-21
04:14
ADM, BMS, and some puzzling interconnections / Veneziano, Gabriele (CERN ; College de France)
The precise connection between the ADM and BMS formalisms is still far from being fully understood. It leads superficially to some puzzles whose resolution can provide new interesting physical insights. [...]
arXiv:2505.11937; CERN-TH-2025-042.- 2025-05-15 - 14 p. - Published in : J. Phys. A: Math. Theor. 58 (2025) 205402 Fulltext: 2505.11937 - PDF; document - PDF;

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2025-05-21
04:09
Extended scalar sectors from all angles -- Mostly at lepton colliders / Robens, Tania (Boskovic Inst., Zagreb ; CERN)
I briefly discuss the current state of the art for models with extended scalar sectors and give examples for corresponding investigations, with a focus on processes at lepton colliders..
RBI-ThPhys-2025-20 ; CERN-TH-2025-082 ; arXiv:2504.11969.
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2025-05-20
04:06
The LHC has ruled out Supersymmetry -- really? / Constantin, L. (LPSC, Grenoble) ; Kraml, S. (LPSC, Grenoble) ; Mahmoudi, F. (IP2I, Lyon ; CERN ; IUF, Paris)
Despite early hopes that the Large Hadron Collider (LHC) would quickly unveil supersymmetric particles, none have been detected to date. [...]
CERN-TH-2025-100 ; arXiv:2505.11251.
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2025-05-20
04:04
Spontaneous Magnetogenesis at the Electroweak Phase Transition / Domcke, Valerie (CERN) ; Ema, Yohei (CERN) ; Patel, Teerthal (Vanderbilt U.)
Spontaneous CP violation during the electroweak phase transition can induce a twisting of the magnetic field configuration of Standard Model dumbbells, resulting in sizable intergalactic magnetic fields and a small baryon asymmetry, in agreement with observations. [...]
CERN-TH-2025-089 ; arXiv:2505.10637.
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2025-05-18
05:11
QCD splitting functions beyond kinematical limits / Campbell, John M. (Fermilab) ; Höche, Stefan (Fermilab) ; Knobbe, Max (Fermilab) ; Preuss, Christian T. (Gottingen U.) ; Reichelt, Daniel (CERN)
We present a systematic decomposition of QCD splitting functions into scalar dipole radiators and pure splitting remainders up to second order in the strong coupling. [...]
FERMILAB-PUB-25-0276-T ; CERN-TH-2025-091 ; MCNET-25-09 ; arXiv:2505.10408.
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2025-05-13
04:08
pNGB Higgs Naturalness at a Tipping Point / McCullough, Matthew (CERN) ; Menkara, Adriana (DESY) ; Salvioni, Ennio (Sussex U.)
In scenarios where the Higgs is viewed as a pseudo Nambu-Goldstone boson (pNGB) the question of naturalness finds itself, from a phenomenological perspective, at a tipping point between direct searches and precision. [...]
CERN-TH-2025-067 ; DESY-25-052 ; arXiv:2505.06052.
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2025-05-07
04:03
The Simplest Dark Matter Model at the Edge of Perturbativity / Escudero, Miguel ; Hambye, Thomas
Increasingly sensitive direct detection dark matter experiments are testing important regions of parameter space for WIMP dark matter and pushing many models to the multi-TeV regime. [...]
CERN-TH-2025-087 ; ULB-TH/25-04 ; arXiv:2505.02408.
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