Dark matter and LHC phenomenology in a left-right supersymmetric model

Details Dark matter and LHC phenomenology in a left-right supersymmetric model Dark matter and LHC phenomenology in a left-right supersymmetric model

2011-09-29

arxiv.org/abs/1109.6478v2

JHEP01(2012)095

Physics

High Energy Physics

High Energy Physics - Phenomenology

32 pages; 18 figures; v2: discussion of Focus point included

Scientific paper

Left-right symmetric extensions of the Minimal Supersymmetric Standard Model can explain neutrino data and have potentially interesting phenomenology beyond that found in minimal SUSY seesaw models. Here we study a SUSY model in which the left-right symmetry is broken by triplets at a high scale, but significantly below the GUT scale. Sparticle spectra in this model differ from the usual constrained MSSM expectations and these changes affect the relic abundance of the lightest neutralino. We discuss changes for the standard stau (and stop) co-annihilation, the Higgs funnel and the focus point regions. The model has potentially large lepton flavour violation in both, left and right, scalar leptons and thus allows, in principle, also for flavoured co-annihilation. We also discuss lepton flavour signals due to violating decays of the second lightest neutralino at the LHC, which can be as large as 20 fb$^{-1}$ at $\sqrt{s}=14$ TeV.

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