2026-01-17
07:04 |
Resonant Landau-Zener conversion in multi-axion systems
/ Dunsky, David I. (New York U., CCPP) ; Manzari, Claudio Andrea (UC, Berkeley ; LBL, Berkeley) ; Quílez, Pablo (UC, San Diego ; CERN) ; Ramos, Maria (CERN) ; Sørensen, Philip (U. Padua, Dept. Phys. Astron. ; INFN, Padua)
Multiple axions may emerge in the low-energy effective theory of Nature. Generically, the potentials describing these axion fields are non-diagonal, leading to mass mixing between axion states which can be temperature-dependent due to QCD instanton effects. [...]
arXiv:2507.06287; CERN-TH-2025-131.-
2026-01-12 - 10 p.
- Published in : JHEP 2601 (2026) 077
Fulltext: 2507.06287 - PDF; document - PDF;
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2025-11-21
04:10 |
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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. Given this context, we update the evaluation of $N^{ }_{\rm eff}$ and the current entropy density via the momentum-averaged approach. [...]
arXiv:2511.04747; LA-UR-25-30442; CERN-TH-2025-225.-
2026-02-13 - 34 p.
Fulltext: 2511.04747 - PDF; document - PDF;
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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. In this work, a systematic study of observables based on topological data analysis is provided for simulations of heavy-ion collisions. [...]
arXiv:2509.02339; CERN-TH-2025-168.-
2025-11-25 - 15 p.
- Published in : Phys. Rev. C 112 (2025) 054909
Fulltext: 2509.02339 - PDF; document - PDF;
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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. We show that an electrically conducting plasma is present in the voids, and that, because of the plasma, \emph{diffusion} into the voids of galactic fields generated by a mean-field dynamo is far too slow to explain the present-day void magnetization. [...]
arXiv:2510.26918; NORDITA-2025-055; CERN-TH-2025-219.-
2026-01-15 - 14 p.
- Published in : Phys. Rev. D
Fulltext: PDF;
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2025-10-23
04:25 |
NLO analysis of the subleading-power $Q_1-Q_{7\gamma}$ interference in $\bar{B}\to X_s\gamma$ at large photon energies
/ Bartocci, Riccardo (Mainz U.) ; Böer, Philipp (CERN) ; Hurth, Tobias (Mainz U.)
We report on progress towards including next-to-leading order (NLO) radiative corrections to the subleading-power factorization formula for the $Q_1^{q}-Q_{7γ}$ interference contribution in $\bar{B}\to X_sγ$ at large photon energies, $m_b - 2E_γ= \mathcal{O}(Λ_{\rm QCD})$. The novel ingredients for a NLO analysis are the one-loop anomalous dimension of the subleading shape function $g_{17}(ω,ω_1;μ)$, which was recently computed by us, and the two-loop corrections to the jet function with an internal charm loop. [...]
arXiv:2510.18811; MITP-25-063; CERN-TH-2025-197.-
2025-10-21 - 10 p.
- Published in : 10.22323/1.485.0301
Fulltext: PDF; Publication: PDF;
In : 2025 European Physical Society Conference on High Energy Physics (EPS-HEP 2025), Marseille, France, 7 - 11 Jul 2025
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2025-10-21
04:04 |
Effects of Radiative Corrections on Starobinsky Inflation
/ Ellis, John (King's Coll. London ; CERN) ; Gherghetta, Tony (U. Minnesota, Minneapolis (main)) ; Kaneta, Kunio (Niigata U. (main)) ; Ke, Wenqi (U. Minnesota, Minneapolis (main)) ; Olive, Keith A. (U. Minnesota, Minneapolis (main))
We analyze radiative corrections to the Starobinsky model of inflation arising from self-interactions of the inflaton, and from its Yukawa couplings, $y$, to matter fermions, and dimensionful trilinear couplings, $κ$, to scalar fields, which could be responsible for reheating the Universe after inflation. The inflaton self-interactions are found to be of higher order in the Hubble expansion rate during inflation, and hence unimportant for CMB observations. [...]
arXiv:2510.15137; UMN-TH-4511/25; FTPI-MINN-25/13; KCL-PH-TH/2025-39; CERN-TH-2025-198.-
2025-12-15 - 15 p.
- Published in : Phys. Rev. D 112 (2025) 123530
Fulltext: 2510.15137 - PDF; document - PDF;
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2025-10-15
04:29 |
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2025-10-07
04:23 |
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2025-09-27
04:05 |
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