Thermal production of light Dirac right-handed sneutrino dark matter

被引：6

作者：

Choi, Ki-Young ^{[1
]}

Kim, Jongkuk ^{[1
]}

Seto, Osamu ^{[2
,3
]}

机构：

[1] Sungkyunkwan Univ, Inst Basic Sci, Phys Res Div BK21, Dept Phys, Suwon 440746, South Korea

[2] Hokkaido Univ, Inst Adv Higher Educ, Sapporo, Hokkaido 0600817, Japan

[3] Hokkaido Univ, Dept Phys, Sapporo, Hokkaido 0600810, Japan

来源：

PHYSICS OF THE DARK UNIVERSE | 2018年 / 22卷

基金：

新加坡国家研究基金会;

关键词：

Neutrino; Dark matter;

D O I：

10.1016/j.dark.2018.09.006

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We consider the production of right-handed (RH) sneutrino dark matter in a model of Dirac neutrino where neutrino Yukawa coupling constants are very small. Dark matter RH sneutrinos are produced by scatterings and decays of thermal particles in the early Universe without reaching thermal equilibrium due to the small Yukawa couplings. We show that not only decays of thermal particles but also the thermal scatterings can be a dominant source as well as non-thermal production in a scenario with light sneutrinos and charged sleptons while other supersymmetric particles are heavy. We also discuss the cosmological implications of this scenario. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：96 / 100

页数：5

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