Brightening the (130 GeV) Gamma-Ray Line

Abstract

The gamma-ray line from dark matter (DM) annihilation is too weak to observe, but its observation will uncover much information, e.g., the DM mass and an nomalously large annihilation rate $\sim 0.1$ pb into di-photon. In this work, we construct a minimal effective theory (EFT) incorporating DM and heavier charged particles. A large annihilation rate is obtained from operator coefficients with resonance or strong coupling enhancement. The EFT is stringently constrained by the XENON100 and WMAP data. Without resonance, Dirac DM or colored charged particles are ruled out. It is pointed out that the di-gluon mode may correctly determine the DM relic density. Interestingly, this framework also provides an origin for the Higgs di-photon excess at the LHC\@. We apply the general analysis to the NMSSM, which can elegantly interpret the tentative 130 GeV gamma-ray line. A top-window model is also proposed to explain the gamma-ray line.

21 pages and 6 figures. Some typos corrected and reference added. Thanks to the new version of NMSSMtools provided by U. Ellwanger, etc., we revise the LSP interpretation in the NMSSM

References in corpus (1)

• First Dark Matter Results from the XENON100 Experiment

Cited by in corpus (14)

• Is the 130 GeV Line Real? A Search for Systematics in the Fermi-LAT Data
• Two Component Dark Matter : A Possible Explanation of 130 GeV γ-Ray Line from the Galactic Centre
• Enhanced diphoton rates at Fermi and the LHC
• Multiple Gamma Lines from Semi-Annihilation
• Precision Unification in λSUSY with a 125 GeV Higgs
• Galactic Center Radio Constraints on Gamma-Ray Lines from Dark Matter Annihilation
• Gamma Lines without a Continuum: Thermal Models for the Fermi-LAT 130 GeV Gamma Line
• Interplay between Fermi gamma-ray lines and collider searches
• Statistical interpretation of the spatial distribution of current 130 GeV gamma-ray line signal within the dark matter annihilation scenario
• Natural explanation for 130 GeV photon line within vector boson dark matter model
• PAMELA/Fermi-LAT electron cosmic ray spectrum at $\sim$100 GeV: implication for dark matter annihilation signal in accordance with the 130 GeV $\gamma$-ray line
• Right Sneutrino Dark Matter and a Monochromatic Photon Line
• Remarks on Two Gamma Ray Lines from the Inner Galaxy
• 130GeV gamma-ray line through axion conversion