Constraining the Monochromatic Gamma-Rays from Dark Matter Annihilation by the LHC

by Dr Sara Khatibi (School of Particles and Accelerators, IPM)

Wednesday 11 Apr 2018, 15:00 → 16:00 Asia/Tehran

Particles and Accelerators School Seminar Room (Larak)

A plethora of evidence puts forward the existence of the new particle(s) responsible for the missing mass in the Universe, coined dark matter(DM). The conventional channels of DM searches at the LHC are the DM plus a hadronic/weak production, such as monojet search. On the other hand, the installation of forward detectors in the CMS and ATLAS turn the LHC into an effective photon-photon collider. The elastic scattering of the beam protons via the emission of photons, which can be identified by tagging the intact protons in the forward detectors provides a powerful diagnostic of the central production of new particles through photon-photon annihilation. In this talk, we present the central production of dark matter particles and the potential of the LHC to constrain the cross section of this process. By virtue of the crossing symmetry, this limit can immediately be used to constrain the production of monochromatic gamma rays in dark matter annihilation.