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2025-12-26
04:03
Twisted Feynman Integrals: from generating functions to spin-resummed post-Minkowskian dynamics / Kim, Joon-Hwi (Caltech) ; Kim, Jung-Wook (CERN ; Potsdam, Max Planck Inst.) ; Lim, Jungwon (Garching, Max Planck Inst.)
We propose to call a class of deformed Feynman integrals as twisted Feynman integrals, where the integrand has an additional exponential factor linear in loop momenta. [...]
CERN-TH-2025-264 ; MPP-2025-235 ; arXiv:2512.21210. - 36.
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2025-12-26
04:01
Quirks Live in Cool Universes / Asadi, Pouya (UC, Santa Cruz) ; Kribs, Graham D. (Oregon U. ; CERN) ; Luty, Markus A. (UC, Davis, QMAP)
We demonstrate that cosmological observations place strong bounds on the reheat temperature $T_\text{RH}$ of the Standard Model (SM) in minimal models of `quirks' -- heavy fermions transforming under the SM gauge group together with a new non-Abelian gauge interaction with a confinement scale far below the mass of the fermions. [...]
CERN-TH-2025-243 ; arXiv:2512.20696. - 5.
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2025-12-25
04:33
Probing invisible particles with charm / Hiller, Gudrun (Dortmund U. ; CERN) ; Suelmann, Dominik (Dortmund U.)
We point out opportunities to probe invisible particles, left- and right-handed neutrinos, axion-like particles (ALPs) and dark photons $(Z^\prime)$ with rare decays of charm hadrons. [...]
CERN-TH-2025-246 ; arXiv:2512.19794. - 22.
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2025-12-24
04:52
A Composite Theory of Higgs and Flavour / Davighi, Joe ; Isidori, Gino
We introduce a composite Higgs model in which a flavour deconstructed gauge group is embedded in the strong sector. [...]
CERN-TH-2025-267 ; ZU-TH 88/25 ; arXiv:2512.19650. - 10.
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2025-12-24
04:52
First-Principles Formalism for Simulating Self-Interacting Dark Matter / Ramos, Maria ; Cohen, Timothy ; Lisanti, Mariangela
It is plausible that the dark matter particles have non-gravitational interactions among themselves. [...]
CERN-TH-2025-263 ; arXiv:2512.17998. - 6.
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2025-12-20
04:04
Probing scalar and pseudoscalar new physics using rare kaon decays / D'Ambrosio, G. (INFN, Naples) ; Iyer, A.M. (Indian Inst. Tech., New Delhi) ; Mahmoudi, F. (IP2I, Lyon ; CERN ; ENS, Lyon, Lab. Phys.) ; Neshatpour, S. (IP2I, Lyon)
Rare kaon decays provide sensitive tests of new physics. [...]
CERN-TH-2025-254 ; arXiv:2512.16903. - 16.
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2025-12-20
04:03
Scalar damping in cosmological phase transitions / Ekstedt, Andreas (Uppsala U.) ; Konstandin, Thomas (DESY) ; van de Vis, Jorinde (CERN)
We outline how to calculate the scalar damping term during a cosmological phase transition from kinetic theory. [...]
DESY-25-195 ; CERN-TH-2025-262 ; arXiv:2512.16663. - 25.
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2025-12-20
04:00
The Physics of Herwig 7 / Bellm, J. (Lund U.) ; Bewick, G. (Durham U., IPPP) ; Ferrario Ravasio, S. (Turin U. ; INFN, Turin) ; Gieseke, S. (KIT, Karlsruhe, TP) ; Grellscheid, D. (U. Bergen (main)) ; Kiebacher, S. (KIT, Karlsruhe, TP) ; Kirchgaeßer, P. (KIT, Karlsruhe, TP) ; Loshaj, F. (KIT, Karlsruhe, TP) ; Masouminia, M.R. (Durham U., IPPP) ; Nail, G. (U. Edinburgh (main)) et al.
We present the physics foundations and recent developments of Herwig 7, the modern successor of the original HERWIG and Herwig++ series. [...]
CERN-TH-2025-252 ; IPPP-25-57 ; HERWIG-2025-01 ; KA-TP-36-2025 ; MCNET-25-31 ; arXiv:2512.16645. - 195.
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2025-12-20
04:00
Charged black holes in the 1/N expansion / Obied, Georges (U. Oxford (main) ; U. Chicago (main)) ; Reig, Mario (Oxford U.(main) ; CERN)
We study some implications of $SU(N)\times U(1)$ theories coupled to gravity in the large-$N$ limit. [...]
CERN-TH-2025-256 ; arXiv:2512.15855. - 32.
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2025-12-17
04:44
The heavy quark-antiquark asymmetry in the variable flavor number scheme / Behring, A. (Garching, Max Planck Inst.) ; Blümlein, J. (DESY ; Dortmund U.) ; De Freitas, A. (Linz U., RISC) ; von Manteuffel, A. (Regensburg U.) ; Schneider, C. (Linz U., RISC) ; Schönwald, K. (CERN)
The twist-2 heavy-quark and antiquark distributions, as defined in the variable flavor number scheme, turn out to be different due to QCD corrections from three-loop onward. [...]
DESY 25--185 ; CERN--TH--2025--259 ; MPP--2025--227 ; RISC Report series 25--10 ; DESY 25-185 ; CERN-TH-2025-259 ; MPP-2025-227 ; RISC Report series 25-10 ; arXiv:2512.13508. - 17.
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