Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-04-06
JHEP 1107:013,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
25 pages, 9 figures; discussion improved, typos corrected, references added; version accepted for publication in JHEP
Scientific paper
10.1007/JHEP07(2011)013
We investigate the constraints to the light neutralino dark matter scenario in the minimal supersymmetric standard model from available experimental observations such as decays of B and K meson, relic dark matter abundance, and the search for neutralino and Higgs production at colliders. We find that two regions of the MSSM parameter space fulfill all the constraints: a fine-tuned strip with large tan beta where the lightest neutralino can be as light as 8 GeV, and a low tan beta region providing a neutralino mass larger than 16 GeV. The large tan beta strip, which can be compatible with recently reported signals from direct detection experiments, can be fully tested by means of low-energy observables and, in particular, by B_s -> mu mu and Higgs bosons searches at the LHC within the upcoming months.
Calibbi Lorenzo
Ota Toshihiko
Takanishi Yasutaka
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