Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-03-03
Phys.Rev.D81:111701,2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
5 pages, 3 figures. v2: refs updated, minor typos corrected, new discussion on B->D\tau\nu, journal version
Scientific paper
10.1103/PhysRevD.81.111701
Motivated by recent data from CoGeNT and the DAMA annual modulation signal, we discuss collider constraints on MSSM neutralino dark matter with mass in the 5-15 GeV range. Such an LSP would be a Bino with a small Higgsino admixture. Maximization of the DM-nucleon scattering cross section for such a WIMP requires a light Higgs boson with tan beta enhanced couplings. Limits on the invisible width of the Z boson, when combined with Tevatron constraints on Higgs bosons at large tan beta, and the rare decay $B^{\pm} \to \tau \nu$ constrain cross sections to be below $\sigma_n \lesssim 2 \times 10^{-41} {cm}^2$. This indicates a slight local Dark Matter over-density would be 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 $b \to s \gamma$ and $t \to b H^+$.
Kuflik Eric
Pierce Aaron
Zurek Kathryn M.
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