Gravitino dark matter in hybrid gauge-gravity models

被引：3

作者：

Cerdeno, D. G. ^{[1
,2
]}

Mambrini, Y. ^{[3
]}

Romagnoni, A. ^{[3
,4
]}

机构：

[1] Univ Autonoma Madrid, Dept Fis Teor C 11, E-28049 Madrid, Spain

[2] Univ Autonoma Madrid, Inst Fis Teor UAM CSIC, E-28049 Madrid, Spain

[3] Univ Paris Sud, Phys Theor Lab, F-91405 Orsay, France

[4] Ecole Polytech, CNRS, Ctr Phys Theor, F-91128 Palaiseau, France

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2009年 / 11期

关键词：

Supersymmetry Breaking; Compactification and String Models; Cosmology of Theories beyond the SM; Supergravity Models; MEDIATED SUPERSYMMETRY BREAKING; HADRONIC CONTRIBUTIONS; MAGNETIC-MOMENT; RELIC DENSITY; CONSTRAINTS; MUON; PROGRAM; LIGHT; MICROMEGAS; G-2;

D O I：

10.1088/1126-6708/2009/11/113

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：

We study the phenomenology of generic supergravity models in which gravity mediation naturally competes with gauge mediation as the origin of supergravity-breaking. This class of hybrid models has been recently motivated in string inspired constructions and differs from usual gauge mediated supersymmetry breaking models in having messenger masses of order of the GUT scale. In these scenarios the gravitino can be the lightest supersymmetric particle in wide regions of the parameter space and therefore a potential candidate for dark matter. We investigate this possibility, imposing the WMAP bound on its relic abundance and taking into account constraints from Big Bang nucleosynthesis. We show that in these constructions viable gravitino dark matter can be obtained in specific regions of the parameter space, featuring large values of tan beta and where the supersymmetry breaking mechanism is dominated by gauge mediation.

引用

页数：18

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