Light neutralino dark matter with a very light Higgs for CoGeNT and DAMA/LIBRA data

Abstract

Recently, the CoGeNT collaboration reported the WIMP candidate signal events exceeding the known backgrounds where the light WIMP with large cross section is supported. Motivated by this issue, we analyze a light neutralino dark matter scenario with a very light CP-even Higgs mediation in the elastic scattering process, which provides the mass and direct detection cross section to explain the CoGeNT result. To be compatible with the result of LEP experiments, the light CP-even Higgs is favored to be in 9 to 10 GeV. Such a scenario can be realized in the "Beyond the MSSM" context. The relic abundance consistent with the WMAP result can be obtained when twice of neutralino mass is close to the light Higgs mass via the resonance enhancement of the annihilation cross section. As a result, the neutralino mass is predicted to be at around 5 to 6 GeV.

21 pages, 5 figures

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Cited by in corpus (6)

• Light Dark Matter from the U(1)_X Sector in the NMSSM with Gauge Mediation
• Supersymmetric Sub-Electroweak Scale Dark Matter, the Galactic Center Gamma-ray Excess, and Exotic Decays of the 125 GeV Higgs Boson
• Light mixed sneutrinos as thermal dark matter
• Measuring a Light Neutralino Mass at the ILC: Testing the MSSM Neutralino Cold Dark Matter Model
• Electroweak Theory without a Higgs potential: Radiative Effects
• Light neutralino dark matter in light Higgs scenario related with the CoGeNT and DAMA/LIBRA results