LHC constraints on dark matter with (130 GeV) gamma ray lines

Abstract

Dark matter annihilation into photons in our galaxy would constitute an exciting indirect signal of its existence, as underscored by tentative evidence for 130 GeV dark matter in Fermi/LAT data. Models that give a large annihilation cross section into photons typically require the dark matter to couple to, or be composed of, new charged particles, that can be produced in colliders. We consider the LHC constraints on some representative models of these types, including the signals of same-sign dileptons, opposite-sign dileptons, events mimicking the production and decay of excited leptons, four-photon events, resonant production of composite vectors decaying into two photons, and monophoton events.

28 pages, 22 figures. v2: Expanded discussions with four new figures, updated references, published version; v3: changed title

References in corpus (6)

• Expected Performance of the ATLAS Experiment - Detector, Trigger and Physics
• A Tentative Gamma-Ray Line from Dark Matter Annihilation at the Fermi Large Area Telescope
• A search for a doubly-charged Higgs boson in pp collisions at sqrt(s) = 7 TeV
• Strong Evidence for Gamma-ray Line Emission from the Inner Galaxy
• More on the Hypercharge Portal into the Dark Sector
• A Clustering Analysis of the Morphology of the 130 GeV Gamma-Ray Feature