Smooth reheating and dark matter via non-Abelian gauge theory

Article Article scientifique Article Smooth reheating and dark matter via non-Abelian gauge theory eng 2024-10 author Biondini S author Kolešová H. 0000-0001-7054-3009 author Procacci Simona 416356 Département de physique théorique (FITEO) 138995 10.1016/j.physletb.2024.138995 0370-2693 https://linkinghub.elsevier.com/retrieve/pii/S0370269324005537 We demonstrate how a dark sector can provide a crucial link between a vacuum-dominated early universe and the later radiation-dominated epoch. As an example, we consider a feeble axion-like coupling of dark non-Abelian gauge fields with a single inflaton. In this scenario, a dark heat bath emerges at the end of inflation. As the dark sector cools down, its gauge fields confine into composite glueball states. The reheating of the visible sector is realized through portal interactions. After confinement, discrete symmetries protect part of the glueball states that form relic dark matter, while the others keep decaying into Standard Model degrees of freedom. The dark relic abundance depends mostly on the departure from equilibrium dynamics after the phase transition, constraining the confinement scale of the dark sector. Moreover, indirect detection and Big-Bang nucleosynthesis set bounds on the scale of portal interactions. We show that in a narrow but non-vanishing region of the parameter space, the correct dark matter abundance and sufficient reheating temperature are simultaneously reached. Dewey 500.2 Swiss National Science Foundation Electroweak scale cosmology in light of LHC data 188712 CH Projects Forskningsrådet 335388 Swiss National Science Foundation Probing primordial phase transitions with the LISA interferometer 212125 CH Projects 37 Département de physique théorique 133 false Physics letters. B 857 d0a71655-8df1-48a7-b0e5-3b543d8556cf Article (Published version) Public 1-s2.0-S0370269324005537-main.pdf 730592 application/pdf CC BY-4.0 b26f242850c9406541f72a3741265354bd40375013c1820751da858ae5afcf4b openAccess Faculté des sciences / Section de physique / Département de physique théorique

Title	Published in	Access level	OA Policy	Year	Views	Downloads

Smooth reheating and dark matter via non-Abelian gauge theory	Physics letters. B			2024	39	448

Archive ouverte UNIGE

Procacci, Simona