Light Higgs Boson, Light Dark Matter and Gamma Rays

• Published in: arXiv.org
• Main Authors: Barger, Vernon, Gao, Y, McCaskey, Mathew, Shaughnessy, Gabe
• Format: Paper Journal Article
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 10.08.2010
• Subjects: Dark matter; Gamma rays; Higgs bosons; Large Hadron Collider; Light; Physics - High Energy Astrophysical Phenomena; Physics - High Energy Physics - Experiment; Physics - High Energy Physics - Phenomenology; Quarks; Standard model (particle physics); Superconducting supercolliders
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.1008.1796

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, \(AA\rightarrow b\bar{b}, c\bar{c}, \tau^+\tau^-\), 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.