Next-to-leading order QCD predictions for the signal of Dark Matter and photon associated production at the LHC

Understand

We study the potential of LHC to discovery the signal of Dark Matter with photon associated production induced by a dimension six effective operator, including NLO QCD corrections.

• We investigate the main backgrounds from SM, i.e.
• $Z$ boson and a photon associated production with invisible dacay of $Z$ boson, and $Z$ boson and a jet production with the jet misidentified as a photon.
• We find that the $p_T^{\gamma}$ distributions of the backgrounds decrease faster than that of the signal with increasing of the transverse momentum of the photon.