Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2002-08-20
Phys.Rev. D66 (2002) 115005
Physics
High Energy Physics
High Energy Physics - Phenomenology
14 pages, 10 figures, corrected and to be published in Phys. Rev. D
Scientific paper
10.1103/PhysRevD.66.115005
Within the low-energy effective Minimal Supersymmetric extension of the Standard Model (effMSSM) we calculate the neutralino relic density taking into account slepton-neutralino, squark-neutralino and neutralino/chargino- neutralino coannihilation channels. By including squark (stop and sbottom) coannihilation channels we extend our comparative study to all allowed coannihilations and obtain the general result that all of them give sizable contributions to the reduction of the neutralino relic density. Due to these coannihilation processes some models (mostly with large neutralino masses) enter into the cosmologically interesting region for relic density, but other models leave this region. Nevertheless, in general, the predictions for direct and indirect dark matter detection rates are not strongly affected by these coannihilation channels in the effMSSM.
Bednyakov Vadim A.
Gronewold V.
Klapdor-Kleingrothaus Hans Volker
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