Relic abundance of dark photon dark matter

被引：172

作者：

Agrawal, Prateek ^{[1
]}

Kitajima, Naoya ^{[2
]}

Reece, Matthew ^{[1
]}

Sekiguchi, Toyokazu ^{[3
]}

Takahashi, Fuminobu ^{[4
,5
,6
]}

机构：

[1] Harvard Univ, Jefferson Phys Lab, 17 Oxford St, Cambridge, MA 02138 USA

[2] Nagoya Univ, Dept Phys & Astrophys, Chikusa Ku, Nagoya, Aichi 4648602, Japan

[3] Univ Tokyo, Grad Sch Sci, Res Ctr Early Universe RESCEU, Tokyo 1130033, Japan

[4] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan

[5] Univ Tokyo, WPI, UTIAS, Kavli Inst Phys & Math Universe Kavli IPMU, Kashiwa, Chiba 2778568, Japan

[6] MIT, Ctr Theoret Phys, Cambridge, MA 02139 USA

来源：

PHYSICS LETTERS B | 2020年 / 801卷

基金：

美国国家科学基金会;

关键词：

CONSTRAINTS; LASER; MODEL;

D O I：

10.1016/j.physletb.2019.135136

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a new mechanism for producing the correct relic abundance of dark photon dark matter over a wide range of its mass, extending down to 10(-20) eV. The dark matter abundance is initially stored in an axion which is misaligned from its minimum. When the axion starts oscillating, it efficiently transfers its energy into dark photons via a tachyonic instability. If the dark photon mass is within a few orders of magnitude of the axion mass, m(gamma')/m(alpha) = O(10(-3) - 1), then dark photons make up the dominant form of dark matter today. We present a numerical lattice simulation for a benchmark model that explicitly realizes our mechanism. This mechanism firms up the motivation for a number of experiments searching for dark photon dark matter. (C) 2019 The Authors. Published by Elsevier B.V.

引用

页数：10

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