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Revisiting the averaged annihilation rate of thermal relics at low temperature
/ Arbey, A. (IP2I, Lyon ; CERN) ; Mahmoudi, F. (IP2I, Lyon ; CERN ; IUF, Paris) ; Palmiotto, M. (IP2I, Lyon)
We derive a low-temperature expansion of the formula to compute the average annihilation rate $\langle \sigma v \rangle$ for dark matter in $\mathbb{Z}_2$-symmetric models, both in the absence and the presence of mass degeneracy in the spectrum near the dark matter candidate. We show that the result obtained in the absence of mass degeneracy is compatible with the analytic formulae in the literature, and that it has a better numerical behaviour for low temperatures. [...]
arXiv:2312.03695; CERN-TH-2023-232.-
2024-07-27 - 14 p.
- Published in : Eur. Phys. J. C 84 (2024) 751
Fulltext: 2312.03695 - PDF; document - PDF;
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Hawking radiation of non-standard black holes
/ Arbey, Alexandre (IP2I, Lyon ; CERN ; IUF, Paris) ; Auffinger, Jeremy (IP2I, Lyon) ; Geiller, Marc (ENS, Lyon, Lab. Phys.) ; Livine, Etera (ENS, Lyon, Lab. Phys.) ; Sartini, Francesco (ENS, Lyon, Lab. Phys.)
Black Holes of primordial origin (PBHs) can constitute a large fraction of dark matter (DM) in the Universe. If light enough, they can emit a sizeable amount of Hawking radiation, which may be detected by dark matter experiments and be used to set constraints on the fraction of PBHs as DM components. [...]
2022 - 4 p.
- Published in : PoS EPS-HEP2021 (2022) 066
Fulltext: PDF;
In : European Physics Society conference on High Energy Physics 2021, Online, Online, 26 - 30 Jul 2021, pp.066
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4.
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AlterBBN
/ Arbey, Alexandre (IP2I, Lyon ; CERN ; IUF, Paris) ; Auffinger, Jeremy (IP2I, Lyon)
We present the code AlterBBN, a public code for the computation of the abundance of the elements from Big-Bang nucleosynthesis in the standard cosmological model as well as in non-standard scenarios..
SISSA, 2021 - 6 p.
- Published in : PoS TOOLS2020 (2021) 032
Fulltext: PDF;
In : Tools for High Energy Physics and Cosmology, Lyon, France, 2 - 6 Nov 2020, pp.032
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Dark radiation constraints on light primordial black holes
/ Auffinger, Jérémy (IP2I, Lyon) ; Arbey, Alexandre (IP2I, Lyon ; CERN ; IUF, Paris) ; Sandick, Pearl (Utah U.) ; Haghi, Barmak Shams Es (Utah U.) ; Sinha, Kuver (Oklahoma U.)
Light black holes could have formed in the very early universe through the collapse of large primordial density fluctuations. These primordial black holes (PBHs), if light enough, would have evaporated by now because of the emission of Hawking radiation; thus they could not represent a sizable fraction of dark matter today. [...]
arXiv:2201.04946; CERN-TH-2021-169.-
2022 - 6 p.
- Published in : PoS EPS-HEP2021 (2022) 147
Fulltext: document - PDF; 2201.04946 - PDF;
In : European Physics Society conference on High Energy Physics 2021, Online, Online, 26 - 30 Jul 2021, pp.147
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Higgs Properties and Supersymmetry: Constraints and Sensitivity from the LHC to an $e^+e^-$ Collider
/ Arbey, A. (IP2I, Lyon ; CERN) ; Battaglia, M. (CERN ; UC, Santa Cruz) ; Djouadi, A. (CAFPE, Granada ; Granada U., Theor. Phys. Astrophys. ; NICPB, Tallinn) ; Mahmoudi, F. (IP2I, Lyon ; CERN) ; Muhlleitner, M. (KIT, Karlsruhe) ; Spira, M. (PSI, Villigen)
The study of the Higgs boson properties offers compelling perspectives for testing the effects of physics beyond the Standard Model and has deep implications for the LHC program and future colliders. Accurate determinations of the Higgs boson properties can provide us with a distinctively precise picture of the Higgs sector, set tight bounds, and predict ranges for the values of new physics model parameters. [...]
arXiv:2201.00070; CERN-TH-2021-227; PSI-PR-21-30.-
2022-09-01 - 27 p.
- Published in : Phys. Rev. D
Fulltext: PDF;
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Automatic extraction of one-loop Wilson coefficients in general BSM scenarios using MARTY-1.4
/ Uhlrich, Grégoire (IP2I, Lyon) ; Mahmoudi, Farvah (IP2I, Lyon ; CERN) ; Arbey, Alexandre (IP2I, Lyon ; CERN)
We present a fully automated procedure providing an easy way to perform, systematically, phenomenological analyses in flavor physics for general BSM scenarios. This procedure relies on MARTY-1.4, is model independent and requires as input only the Lagrangian of the theory. [...]
arXiv:2110.14515; CERN-TH-2021-170.-
2022-02-02 - 4 p.
- Published in : PoS EPS-HEP2021 (2022) 507
Fulltext: document - PDF; 2110.14515 - PDF;
In : European Physics Society conference on High Energy Physics 2021, Online, Online, 26 - 30 Jul 2021, pp.507
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Higgs couplings: constraints and sensitivity on Supersymmetry
/ Mahmoudi, Farvah (IP2I, Lyon ; CERN) ; Arbey, Alexandre (IP2I, Lyon ; CERN) ; Battaglia, Marco (UC, Santa Cruz) ; Djouadi, Abdelhak (Annecy, LAPTH ; NICPB, Tallinn) ; Mühlleitner, Margarete (KIT, Karlsruhe) ; Spira, Michael (PSI, Villigen)
The determination of the fundamental properties of the Higgs boson with sufficient accuracy has crucial implications for physics beyond the Standard Model. Here, we consider Supersymmetry and highlight the complementarity of the Higgs measurements and the superparticle searches at the LHC, based on the 8 and 13 TeV results, in probing its phenomenological minimal version, the pMSSM. [...]
SISSA, 2021 - 6 p.
- Published in : PoS ICHEP2020 (2021) 261
Fulltext: PDF;
In : 40th International Conference on High Energy Physics (ICHEP), Prague, Czech Republic, 28 Jul - 6 Aug 2020, pp.261
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