/ Phenomenology-HEP arXiv:0811.2911


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


Gladyshev, A.V. (Moscow, ITEP) ; Kazakov, D.I. (Moscow, ITEP) ; Paucar, M.G. (Dubna, JINR)

Published in: J.Phys.G
Year: 2009
Vol.: G36
Page No: 125009
Pages: 11

Abstract: 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.

Web-Page: http://inspirebeta.net/record/802875/files/1ch.png; http://inspirebeta.net/record/802875/files/2ch.png; http://inspirebeta.net/record/802875/files/3ch.png; http://inspirebeta.net/record/802875/files/4ch.png; http://inspirebeta.net/record/802875/files/5ch.png; http://inspirebeta.net/record/802875/files/6ch.png; http://inspirebeta.net/record/802875/files/chne1.png; http://inspirebeta.net/record/802875/files/chne2.png; http://inspirebeta.net/record/802875/files/chprod.png; http://inspirebeta.net/record/802875/files/life1.png; http://inspirebeta.net/record/802875/files/life2.png

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