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

At hadron colliders the $γγ+jet$ channel provides larger signal-to-background ratio in comparison with inclusive $γγ$ 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 $γγ+jet$ 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 $γγ+jet$ channel. We have found that this channel is comparable with $γγ$ channel in searches for new physics and deserves further detailed investigations.