Constraints from Charge and Colour Breaking Minima in the (M+1)SSM

Details Constraints from Charge and Colour Breaking Minima in the (M+1)SSM Constraints from Charge and Colour Breaking Minima in the (M+1)SSM

1999-02-19

arxiv.org/abs/hep-ph/9902401v1

Phys.Lett. B457 (1999) 299-306

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages (LaTeX2e), 1 fig

Scientific paper

10.1016/S0370-2693(99)00546-8

We study the constraints on the parameter space of the supersymmetric standard model extended by a gauge singlet, which arise from the absence of global minima of the effective potential with slepton or squark vevs. Particular attention is paid to the so-called ``UFB'' directions in field space, which are F-flat in the MSSM. Although these directions are no longer F-flat in the (M+1)SSM, we show that the corresponding MSSM-like constraints on m_0/M_{1/2} apply also to the (M+1)SSM. The net effect of all constraints on the parameter space are more dramatic than in the MSSM. We discuss the phenomenological implications of these constraints.

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