Journal
NUCLEAR PHYSICS B
Volume 808, Issue 1-2, Pages 237-259Publisher
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DOI: 10.1016/j.nuclphysb.2008.09.023
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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.
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