Nonthermal dark matter in string compactifications

被引：61

作者：

Allahverdi, Rouzbeh ^{[1
]}

Cicoli, Michele ^{[2
,3
,4
]}

Dutta, Bhaskar ^{[5
]}

Sinha, Kuver ^{[6
]}

机构：

[1] Univ New Mexico, Dept Phys & Astron, Albuquerque, NM 87131 USA

[2] Univ Bologna, Dipartimento Fis & Astron, I-40126 Bologna, Italy

[3] Ist Nazl Fis Nucl, Sez Bologna, I-40126 Bologna, Italy

[4] Abdus Salam Int Ctr Theoret Phys, I-34014 Trieste, Italy

[5] Texas A&M Univ, Dept Phys & Astron, College Stn, TX 77843 USA

[6] Syracuse Univ, Dept Phys, Syracuse, NY 13244 USA

来源：

PHYSICAL REVIEW D | 2013年 / 88卷 / 09期

基金：

美国国家科学基金会;

关键词：

COSMOLOGICAL IMPLICATIONS;

D O I：

10.1103/PhysRevD.88.095015

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Nonthermal cosmological histories are capable of greatly increasing the available parameter space of different particle physics dark matter (DM) models and are well motivated by the ubiquity of late-decaying gravitationally coupled scalars in UV theories like string theory. A nonthermal DM model is presented in the context of LARGE Volume Scenarios in type IIB string theory. The model is capable of addressing both the moduli-induced gravitino problem as well as the problem of overproduction of axionic dark radiation and/or DM. We show that the right abundance of neutralino DM can be obtained in both thermal under and overproduction cases for DM masses between O(GeV) and O(TeV). In the latter case the contribution of the QCD axion to the relic density is totally negligible, while in the former case it can be comparable to that of the neutralino thus resulting in a multicomponent DM scenario.

引用

页数：6

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