Dark matter annihilation through a lepton-specific Higgs boson

Abstract

It was recently argued by Hooper and Goodenough [arXiv:1010.2752] that the excess gamma ray emission from within 1-2 degrees of the galactic center can be well-described by annihilation of ~8 GeV dark matter particles into tau pairs. I show that such a dark matter signal can be obtained naturally in the lepton-specific two-Higgs-doublet model extended by a stable singlet scalar dark matter candidate. The favored parameter region prefers a light Higgs state (below 200 GeV) with enhanced couplings to leptons and sizable invisible branching fraction. Part of the favored region leads to invisible decays of both of the CP-even neutral Higgs states.

15 pages, no figures. V2: references added, fine-tuning discussion improved, submitted to PRD. V3: added Sec. 6 on direct detection prospects and associated refs, version accepted by PRD

References in corpus (18)

• HDECAY: a Program for Higgs Boson Decays in the Standard Model and its Supersymmetric Extension
• The Minimal Model of Nonbaryonic Dark Matter: A Singlet Scalar
• Little Higgs Review
• First Dark Matter Results from the XENON100 Experiment
• Re-Evaluation of the Elastic Scattering of Supersymmetric Dark Matter
• Models of Yukawa interaction in the two Higgs doublet model, and their collider phenomenology
• Neutrino mass, Dark Matter and Baryon Asymmetry via TeV-Scale Physics without Fine-Tuning
• Phenomenology of models with more than two Higgs doublets
• Complex Scalar Dark Matter vis-à-vis CoGeNT, DAMA/LIBRA and XENON100
• Non-minimal neutral Higgs bosons at LEP2
• Fermiophobic and other non-minimal neutral Higgs bosons at the LHC
• Lepton-Specific Two-Higgs Doublet Model: Experimental Constraints and Implication on Higgs Phenomenology
• Three-body decays of Higgs bosons at LEP2 and application to a hidden fermiophobic Higgs
• The LHC Discovery Potential of a Leptophilic Higgs
• The Leptonic Higgs as a Messenger of Dark Matter
• Charged Higgs phenomenology in the lepton-specific two Higgs doublet model
• Higgs ID at the LHC
• Light Higgs Boson, Light Dark Matter and Gamma Rays

Cited by in corpus (28)

• The Characterization of the Gamma-Ray Signal from the Central Milky Way: A Compelling Case for Annihilating Dark Matter
• A Tale of Tails: Dark Matter Interpretations of the Fermi GeV Excess in Light of Background Model Systematics
• Hidden On-Shell Mediators for the Galactic Center Gamma-Ray Excess
• The N2HDM under Theoretical and Experimental Scrutiny
• WIMPs at the Galactic Center
• Flavored Dark Matter and the Galactic Center Gamma-Ray Excess
• Hidden Sector Dark Matter Models for the Galactic Center Gamma-Ray Excess
• Challenges in Explaining the Galactic Center Gamma-Ray Excess with Millisecond Pulsars
• BSMPT - Beyond the Standard Model Phase Transitions -A Tool for the Electroweak Phase Transition in Extended Higgs Sectors
• Explaining $(g-2{)}_{\mu ,e}$, the KOTO anomaly and the MiniBooNE excess in an extended Higgs model with sterile neutrinos
• Phenomenological Comparison of Models with Extended Higgs Sectors
• Dark matter and a suppression mechanism for neutrino masses in the Higgs triplet model
• Direct and Indirect Singlet Scalar Dark Matter Detection in the Lepton-Specific two-Higgs-doublet Model
• A description of the Galactic Center excess in the Minimal Supersymmetric Standard Model
• Implications of the observation of dark matter self-interactions for singlet scalar dark matter
• The $\text{Fermi}$-LAT gamma-ray excess at the Galactic Center in the singlet-doublet fermion dark matter model
• Confronting Galactic and Extragalactic $\gamma$-ray observed by Fermi-LAT with Annihilating Dark Matter in Inert Higgs Doublet Model
• W-WIMP Annihilation as a Source of the Fermi Bubbles
• Asymmetric di-Higgs signals of the next-to-minimal 2HDM with a $U(1)$ symmetry
• Real singlet scalar dark matter extension of the Georgi-Machacek model
• The Galactic Center Region Gamma Ray Excess from A Supersymmetric Leptophilic Higgs Model
• Lining up the Galactic Center Gamma-Ray Excess
• Neutrino and CP-even Higgs boson masses in a nonuniversal $\mathrm{U}(1{)}^{\prime }$ extension
• Wavelet-Based Techniques for the Gamma-Ray Sky
• Dark Matter Detection with Hard X-ray Telescopes
• Extracting the size of the cosmic electron-positron anomaly
• Dark Matter in Leptophilic Higgs Models After the LHC Run-I
• From Peccei Quinn symmetry to mass hierarchy problem