A V Gladyshev et al 2009 J. Phys. G: Nucl. Part. Phys. 36 125009 doi:10.1088/0954-3899/36/12/125009
A V Gladyshev1,2, D I Kazakov1,2 and M G Paucar1
Show affiliationsWe analyse the possibility of getting light long-lived charginos within the framework of the MSSM with gravity mediated SUSY breaking. This possibility can be realized in the so-called focus-point region of the 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 tenths of a pb.
12.60.Jv Supersymmetric models
14.80.Ly Supersymmetric partners of known particles
11.30.Qc Spontaneous and radiative symmetry breaking
12.15.-y Electroweak interactions
13.85.-t Hadron-induced high- and super-high-energy interactions (energy>10 GeV)
Issue 12 (December 2009)
Received 7 May 2009
Published 3 November 2009
A V Gladyshev et al 2009 J. Phys. G: Nucl. Part. Phys. 36 125009
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