Gauge Mediation with Gauge Messengers in SU(5)

Details Gauge Mediation with Gauge Messengers in SU(5) Gauge Mediation with Gauge Messengers in SU(5)

2010-07-21

arxiv.org/abs/1007.3616v4

JHEP 1012:042,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

33 pages, 7 figures, version submitted to jhep

Scientific paper

10.1007/JHEP12(2010)042

The inclusion of gauge messengers in models of gauge mediation allows for more general predictions that those described by the framework of general gauge mediation. Motivated by this, we explore some models of gauge mediation with gauge messengers in SU(5) GUTs. In most previous attempts of building viable models where gauge messengers play a role in determining the soft terms, squark and/or slepton masses turned out to be tachyonic. The objective of this paper is to address this problem and propose two possible solutions, one of which has a natural realization in the solution of the doublet-triplet problem. Another interesting result is that in these models the association of SUSY breaking with the breaking of the GUT group provides a simple mechanism that can explain why $SU(5)\rightarrow SU(3)\times SU(2) \times U(1)$ is preferred over other symmetry breaking patterns.

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