Particle Dark Matter Density and Entropy Production in the Early Universe
| Autor: | Maxim Khlopov, Arnab Chaudhuri, Shiladitya Porey |
|---|---|
| Přispěvatelé: | AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) |
| Rok vydání: | 2022 |
| Předmět: |
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
Physics and Astronomy (miscellaneous) General Mathematics entropy: production FOS: Physical sciences 02 engineering and technology 01 natural sciences dark matter Higgs particle: doublet High Energy Physics - Phenomenology (hep-ph) 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Computer Science (miscellaneous) electroweak interaction: critical phenomena 010308 nuclear & particles physics dark matter: relic density Higgs particle: doublet: 2 High Energy Physics - Phenomenology Chemistry (miscellaneous) [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph] 020201 artificial intelligence & image processing electroweak phase transition entropy [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] Astrophysics - Cosmology and Nongalactic Astrophysics |
| Zdroj: | Symmetry; Volume 14; Issue 2; Pages: 271 Symmetry Symmetry, 2022, 14 (2), pp.271. ⟨10.3390/sym14020271⟩ |
| ISSN: | 2073-8994 |
| DOI: | 10.3390/sym14020271 |
| Popis: | Dark Matter (DM) density is reduced if entropy production takes place after DM particles abundance is frozen out in the early universe. We study a possibility of such reduction due to entropy production in the electroweak phase transition (EWPT). We compare scenarios of entropy production in the standard model (SM) and its simplest extension, the two-Higgs doublet model (2HDM). Assuming the EWPT is of second order in the SM scenario and the first order in the 2HDM, we calculate the entropy release in these scenarios and the corresponding dilution of preexisting DM density in the early universe. We find the effect of dilution in EWPT significant for confrontation with observations of any form of possible DM (including primordial black holes (PBHs)), which is frozen out, decoupled, frozen in, or formed before EWPT. Comment: 14 pages, 7 figures, 1 table |
| Databáze: | OpenAIRE |
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