Light neutralinos with large scattering cross sections in the minimal supersymmetric standard model

Journal Article · Tue Jun 01 04:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.111701· OSTI ID:21407934

Kuflik, Eric; Pierce, Aaron; Zurek, Kathryn M ^[1]

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1. Michigan Center for Theoretical Physics, University of Michigan, Ann Arbor, Michigan 48109 (United States)

Motivated by recent data from CoGeNT and the DAMA annual modulation signal, we discuss collider constraints on the minimal supersymmetric standard model neutralino dark matter with mass in the 5-15 GeV range. The lightest superpartner (LSP) would be a bino with a small Higgsino admixture. Maximization of the dark matter nucleon scattering cross section for such a weakly interacting massive particle requires a light Higgs boson with tan{beta} enhanced couplings. Limits on the invisible width of the Z boson, combined with the rare decays B{sup {+-}{yields}{tau}{nu},} and the ratio B{yields}D{tau}{nu}/B{yields}Dl{nu}, constrain cross sections to be below {sigma}{sub n} < or approx. 5x10{sup -42} cm{sup 2}. This indicates a higher local dark matter density than is usually assumed by a factor of roughly 6 necessary to explain the CoGeNT excess. This scenario also requires a light charged Higgs boson, which can give substantial contributions to rare decays such as b{yields}s{gamma} and t{yields}bH{sup +}. We also discuss the impact of Tevatron searches for Higgs bosons at large tan{beta}.

• OSTI ID: 21407934
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 11 Vol. 81; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

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