LHC prospects in searches for neutral scalars in pp\to\gamma\gamma+jet: SM Higgs boson, radion, sgoldstino

Abstract

At hadron colliders the $\gamma \gamma +jet$ channel provides larger signal-to-background ratio in comparison with inclusive $\gamma \gamma$ channel in hunting for scalars uncharged under the SM gauge group. At NLO in QCD perturbation theory we evaluate selfconsistently the signal significance for the SM Higgs boson production in $\gamma \gamma +jet$ channel at LHC. Three-body final state kinematics allows for refined cuts. The adjustment of these cuts increases the signal significance upto the level of inclusive channel. Applying a justified simple rescaling procedure to the results obtained for SM Higgs boson, we estimate the LHC prospects in searches for radion and sgoldstino in $\gamma \gamma +jet$ channel. We have found that this channel is comparable with $\gamma \gamma$ channel in searches for new physics and deserves further detailed investigations.

Comments: 15 pages, 4 figures, 5 tables