A light neutralino in hybrid models of supersymmetry breaking

被引：24
作者：
Dudas, Emilian [3 ,4 ]
Lavignac, Stephane [1 ,2 ]
Parmentier, Jeanne [1 ,2 ,3 ]
机构：
[1] CEA Saclay, Inst Phys Theor, CNRS, Lab Direct Sci Mat, F-91191 Gif Sur Yvette, France
[2] CEA Saclay, Unite Rech, URA 2306, F-91191 Gif Sur Yvette, France
[3] Ecole Polytech, Ctr Phys Theor, UMR 7644, CNRS, F-91128 Palaiseau, France
[4] Univ Paris Sud, Phys Theor Lab, CNRS, UMR 8627, F-91405 Orsay, France
来源：
NUCLEAR PHYSICS B | 2009年 / 808卷 / 1-2期
关键词：
RELIC DENSITY; DARK-MATTER; MU-PROBLEM; GAUGE; SUPERGRAVITY; MICROMEGAS; PROGRAM;
D O I：
10.1016/j.nuclphysb.2008.09.023
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 show that in gauge mediation models where heavy messenger masses are provided by the adjoint Higgs field of an underlying SU(5) theory, a generalized gauge mediation spectrum arises with the characteristic feature of having a neutralino LSP much lighter than in the standard gauge or gravity mediation schemes. This naturally fits in a hybrid scenario where gravity mediation, while subdominant with respect to gauge mediation, provides mu and B mu parameters of the appropriate size for electroweak symmetry breaking. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：237 / 259
页数：23
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