Optimization of event selections for tH-production

This summer student project studies the perspectives for the search of tH-production in di-photonic decay channel of Higgs-boson. Monte-Carlo simulation data of 3000 fb^{1} integrated luminosity corresponding to proton-proton collisions of center-of-mass energy 13 TeV at ATLAS detector are used in this analysis. The process being searched for, unlike other Higgs processes (e.g. ttH->γγ), is sensitive to the sign of Yukawa coupling between top-quark and Higgs-boson. However, tH-production has a very small cross section in SM, which complicates the searches. This works aims to find suitable selection criteria, which in its turn will suppress the background and provide enough statistics of tH signal for further searches.