Gravitino dark matter in split supersymmetry with bilinear R-parity violation

被引:5
|
作者
Cottin, Giovanna [1 ]
Diaz, Marco A. [2 ]
Jose Guzman, Maria [3 ]
Panes, Boris [4 ]
机构
[1] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England
[2] Pontificia Univ Catolica Chile, Inst Fis, Santiago, Chile
[3] Inst Astron & Fis Espacio, RA-1428 Buenos Aires, DF, Argentina
[4] Univ Sao Paulo, Inst Fis, BR-05508900 Sao Paulo, Brazil
来源
EUROPEAN PHYSICAL JOURNAL C | 2014年 / 74卷 / 11期
基金
巴西圣保罗研究基金会;
关键词
INFLATIONARY UNIVERSE; COSMOLOGY; BREAKING; FLATNESS; HORIZON; DECAYS; SUSY; GUT;
D O I
10.1140/epjc/s10052-014-3138-2
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
In Split-SUSY with BRpV we show that the Gravitino DM solution is consistent with experimental evidence as regards its relic density and life time. We arrive at this conclusion by performing a complete numerical and algebraic study of the parameter space, including constraints from the recently determined Higgs mass, updated neutrino physics, and BBN constraints on NLSP decays. The Higgs mass requires a relatively low Split-SUSY mass scale, which is naturally smaller than usual values for reheating temperature, allowing the use of the standard expression for the relic density. We include restrictions from neutrino physics with three generations, and we notice that the gravitino decay width depends on the atmospheric neutrino mass scale. We calculate the neutralino decay rate and find it consistent with BBN. We mention some implications on indirect DM searches.
引用
收藏
页码:1 / 17
页数:17
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