Light Higgs Boson, Light Dark Matter and Gamma Rays

Abstract

A light Higgs boson is preferred by $M_W$ and $m_t$ measurements. A complex scalar singlet addition to the Standard Model allows a better fit to these measurements through a new light singlet dominated state. It then predicts a light Dark Matter (DM) particle that can explain the signals of DM scattering from nuclei in the CoGeNT and DAMA/LIBRA experiments. Annihilations of this DM in the galactic halo, $AA\to b\bar{b},c\bar{c},{\tau }^{+}{\tau }^{-}$, lead to gamma rays that naturally improve a fit to the Fermi Large Area Telescope data in the central galactic regions. The associated light neutral Higgs boson may also be discovered at the Large Hadron Collider.

19 pages, 7 figures, 1 table

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• A coherent understanding of low-energy nuclear recoils in liquid xenon

Cited by in corpus (7)

• Scalar Simplified Models for Dark Matter
• A Renormalizable Model for the Galactic Center Gamma Ray Excess from Dark Matter Annihilation
• Singlet Scalar Dark Matter: monochromatic gamma rays and metastable vacua
• Supersymmetric Sub-Electroweak Scale Dark Matter, the Galactic Center Gamma-ray Excess, and Exotic Decays of the 125 GeV Higgs Boson
• Dark matter annihilation through a lepton-specific Higgs boson
• The Galactic Center Region Gamma Ray Excess from A Supersymmetric Leptophilic Higgs Model
• A possible explanation for NuTeV's anomalous dimuon events