Aspects of Non-minimal Gauge Mediation

Details Aspects of Non-minimal Gauge Mediation Aspects of Non-minimal Gauge Mediation

2010-03-16

arxiv.org/abs/1003.3155v3

JHEP 1006:056,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

56 pages, 8 figures; v2:minor corrections, references added; v3:minor corrections

Scientific paper

10.1007/JHEP06(2010)056

A large class of non-minimal gauge mediation models, such as (semi-)direct gauge mediation, predict a hierarchy between the masses of the supersymmetric standard model gauginos and those of scalar particles. We perform a comprehensive study of these non-minimal gauge mediation models, including mass calculations in semi-direct gauge mediation, to illustrate these features, and discuss the phenomenology of the models. We point out that the cosmological gravitino problem places stringent constraints on mass splittings, when the Bino is the NLSP. However, the GUT relation of the gaugino masses is broken unlike the case of minimal gauge mediation, and an NLSP other than the Bino (especially the gluino NLSP) becomes possible, relaxing the cosmological constraints. We also discuss the collider signals of the models.

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