Long-lived Charginos in the Focus-point Region of the MSSM Parameter Space

Details Long-lived Charginos in the Focus-point Region of the MSSM Parameter Space Long-lived Charginos in the Focus-point Region of the MSSM Parameter Space

2008-11-18

arxiv.org/abs/0811.2911v1

J.Phys.G36:125009,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX, 11 pages, 11 eps figures

Scientific paper

10.1088/0954-3899/36/12/125009

We analyse the possibility to get light long-lived charginos within the framework of the MSSM with gravity mediated SUSY breaking. We find out that this possibility can be realized in the so-called focus-point region of parameter space. The mass degeneracy of higgsino-like chargino and two higgsino-like neutralinos is the necessary condition for a long lifetime. It requires the fine-tuning of parameters, but being a single additional constraint in the whole parameter space it can be fulfilled in the Constrained MSSM along the border line where radiative electroweak symmetry breaking fails. In a narrow band close to the border line the charginos are long-lived particles. The cross-sections of their production and co-production at the LHC via electroweak interaction reach a few tenth of pb.

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