Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-08-05
Nucl.Phys.B808:237-259,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
32 pages. v2: revised discussions of the generation of Bmu and of the dark matter constraint; numerous small redactional chang
Scientific paper
10.1016/j.nuclphysb.2008.09.023
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 Bmu parameters of the appropriate size for electroweak symmetry breaking.
Dudas Emilian
Lavignac Stephane
Parmentier Jeanne
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