From gamma ray line signals of dark matter to the LHC

Abstract

We explore the relationship between astrophysical gamma-ray signals and LHC signatures for a class of phenomenologically successful secluded dark matter models, motivated by recent evidence for a ~130 GeV gamma-ray line. We consider in detail scenarios in which interactions between the dark sector and the standard model are mediated by a vev-less scalar field ϕ, transforming as an N-plet (N > 3) under SU(2)_L. Since some of the component fields of ϕcarry large electric charges, loop induced dark matter annihilation to γγand γZ can be enhanced without the need for non-perturbatively large couplings, and without overproduction of continuum gamma-rays from other final states. We discuss prospects for other experimental tests, including dark matter-nucleon scattering and production of ϕat the LHC, where future searches for anomalous charged tracks may be sensitive. The first LHC hints could come from the Higgs sector, where loop corrections involving ϕlead to significantly modified h to γγand h to γZ branching ratios.

27 pages, 10 figures. v2: added references, fixed import-order issue with cleveref and hyperref. v3: updated to journal version. v4: erratum correction to figs. 7-8 for monojet/monophoton cross-sections

References in corpus (9)

• The Tevatron at the Frontier of Dark Matter Direct Detection
• A Tentative Gamma-Ray Line from Dark Matter Annihilation at the Fermi Large Area Telescope
• Indirect search for dark matter with micrOMEGAs2.4
• Maverick dark matter at colliders
• Search for Dark Matter and Large Extra Dimensions in pp Collisions Yielding a Photon and Missing Transverse Energy
• Vacuum structure and stability of a singlet fermion dark matter model with a singlet scalar messenger
• Enhanced $h\to \gamma \gamma$ rate in MSSM singlet extensions
• Two Lines or Not Two Lines? That is the Question of Gamma Ray Spectra
• Gamma Lines without a Continuum: Thermal Models for the Fermi-LAT 130 GeV Gamma Line

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• The Vev Flip-Flop: Dark Matter Decay between Weak Scale Phase Transitions
• Constraining models with a large scalar multiplet
• Exotic Leptons: Higgs, Flavor and Collider Phenomenology
• SUSY dark matter(s)
• Gamma-ray lines and One-Loop Continuum from s-channel Dark Matter Annihilations
• Probing Charged Matter Through Higgs Diphoton Decay, Gamma Ray Lines, and EDMs
• Looking for new charged states at the LHC: Signatures of Magnetic and Rayleigh Dark Matter
• Scalar Electroweak Multiplet Dark Matter
• Variations on the Vev Flip-Flop: Instantaneous Freeze-out and Decaying Dark Matter
• Gamma Rays from Top-Mediated Dark Matter Annihilations
• Secluded Dark Matter in light of the Cherenkov Telescope Array (CTA)
• LHC constraints on dark matter with (130 GeV) gamma ray lines