Search for a Higgs boson produced in association with a W boson at ATLAS [Elektronische Ressource] / vorgelegt von Benjamin Ruckert

Search for a Higgs BosonProduced in Association with aW Boson at ATLASDissertation der Fakult at fur PhysikderLudwig-Maximilians-Universit at Munc henvorgelegt vonBenjamin Ruckertgeboren in KaufbeurenMunc hen, im September 20091. Gutachter: Prof. Dr. Dorothee Schaile2.hter: Prof. Dr. Wolfgang Dunn weberTag der mundlic hen Prufung: 23.11.2009AbstractThe Large Hadron Collider at CERN the most modern proton-proton colliderpand data taking will start in 2009, with a centre-of-mass energy of s = 7 TeV.The ATLAS detector, which is one of two multi-purpose detectors at the LargeHadron Collider, is able to detect a Standard Model Higgs boson if it exists. Thisis one of the main tasks of the ATLAS experiment.This thesis deals with a Standard Model Higgs boson produced in associationwith aW boson. The Monte Carlo study is based on physics events generated atpthe nominal centre-of-mass energy of the Large Hadron Collider of s = 14 TeV.Large parts of this analysis have been done using the global Grid infrastructureof the Large Hadron Collider experiments. A mass range of the Higgs bosonof m = 130 190 GeV has been taken into account. In this mass range,Hthe Higgs boson dominantly decays into a pair of W bosons, leading to initiallythree W bosons: WH! WWW . Two orthogonal analysis channels have beeninvestigated in detailed studies of the background properties.