부산대학교 도서관

Summary: This document presents constraints on Higgs boson production at high transverse momentum using the bb̄ channel. The study is based on data collected at √s = 13 TeV with the ATLAS detector, corresponding to an integrated luminosity of 136 fb−1. The events of interest consist of two large radius jets recoilling against each other. The Higgs boson decaying to b-quarks is identified using b-tagging techniques, exploiting the experimental signature of b-hadron decays while the other jet is a fully hadronic system. Z → bb̄ events are used to validate experimental techniques. Upper limits at the 95% confidence level on the Higgs boson production cross section are established for transverse momenta above 450 GeV and above 1 TeV. Studies related to possible improvements of these results, by reducing the uncertainties are also discussed, such as the use of modern jet definitions like UFO jets and the development of jet substructure taggers using machine learning techniques.