Higgs boson discovery potential of LHC in the channel pp→γγ+jet

We discuss the SM Higgs discovery potential of LHC in the reaction pp→H+jet→γγ+jet when the jet is observed at sufficiently high Et to be reliably identified. We conclude that this channel gives promising discovery possibilities for the Higgs boson mass range 100–140 GeV, during LHC operation at a low luminosity. With 30 fb−1 of accumulated data and for MH=120 GeV about 100 signal events could be observed with the number of background events larger by a factor of 2 only, showing a signal significance S/B∼7. We use the difference of distributions in the partonic subprocess energy ŝ for the signal and background for a better separation of the signal.