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

References in corpus (13)

• Gauge Singlet Scalars as Cold Dark Matter
• Measurement of the Cosmic Ray e+ plus e- spectrum from 20 GeV to 1 TeV with the Fermi Large Area Telescope
• LHC Phenomenology of an Extended Standard Model with a Real Scalar Singlet
• Complex Singlet Extension of the Standard Model
• Minimal Extension of the Standard Model Scalar Sector
• WIMP dark matter, Higgs exchange and DAMA
• Nonstandard Higgs Boson Decays
• Role of h --> eta eta in Intermediate-Mass Higgs Boson Searches at the Large Hadron Collider
• Dark matter and pulsar signals for Fermi LAT, PAMELA, ATIC, HESS and WMAP data
• Higgs Signal for h to aa at Hadron Colliders
• Collider Signatures of Singlet Extended Higgs Sectors
• Substructure Boosts to Dark Matter Annihilation from Sommerfeld Enhancement
• A coherent understanding of low-energy nuclear recoils in liquid xenon

Cited by in corpus (4)

• Singlet Scalar Dark Matter: monochromatic gamma rays and metastable vacua
• 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