Revisiting light neutralino scenarios in the MSSM

Details Revisiting light neutralino scenarios in the MSSM Revisiting light neutralino scenarios in the MSSM

2011-08-05

arxiv.org/abs/1108.1338v1

Phys. Rev. D 84, 095015 (2011)

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, 8 figures

Scientific paper

We revisit the case of a light neutralino LSP in the framework of the MSSM. We consider a model with eleven free parameters. We show that all scenarios where the annihilation of light neutralinos rely mainly on the exchange of a light pseudoscalar are excluded by direct detection searches and by Fermi measurements of the gamma-flux from dwarf spheroidal galaxies. On the other hand, we find scenarios with light sleptons that satisfy all collider and astroparticle physics constraints. In this case, the lower limit on the LSP mass is 12.6 GeV. We discuss how the parameter space of the model will be further probed by new physics searches at the LHC.

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