Testing axionic dark matter during gravitational reheating

被引：1

作者：

Barman, Basabendu ^{[1
]}

Datta, Arghyajit ^{[2
,3
]}

机构：

[1] SRM Univ AP, Sch Engn & Sci, Dept Phys, Amaravati 522240, India

[2] Kyungpook Natl Univ, Dept Phys, Daegu 41566, South Korea

[3] Chonnam Natl Univ, Ctr Precis Neutrino Res, Gwangju 61186, South Korea

来源：

PHYSICAL REVIEW D | 2024年 / 109卷 / 09期

基金：

新加坡国家研究基金会;

关键词：

CP CONSERVATION; EARLY UNIVERSE; INVARIANCE;

D O I：

10.1103/PhysRevD.109.095029

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Assuming axions are potential dark matter (DM) candidate that make up all of the DM abundance, we discuss production of axions via (i) standard misalignment mechanism during the period of reheating and (ii) graviton-mediated 2-to-2 scattering of the inflaton and bath particles, where the inflaton phi oscillates in a monomial potential V(phi) proportional to phi(k) with a general equation of state. Considering reheating takes place purely gravitationally, mediated by massless gravitons, we explore the viable region of the parameter space that agrees with the observed DM relic abundance, satisfying bounds from big bang nucleosynthesis and cosmic microwave background radiation. We also discuss complementarity between dedicated axion search experiments and futuristic gravitational wave search facilities in probing the viable parameter space, thanks to the presence of detectable primordial gravitational waves with an inflationary origin.

引用

页数：17