Studies into tau reconstruction, missing transverse energy and photon induced processes with the ATLAS detector at the LHC [Elektronische Ressource] / Robindra P. Prabhu

Studies into tau reconstruction, missing transverse energyand photon induced processes with the ATLAS detector atthe LHCDissertationzurErlangung des Doktorgrades (Dr. rer. nat.)derMathematisch-Naturwissenschaftlichen Fakult atderRheinischen Friedrich-Wilhelms-Universit at Bonnvorgelegt vonRobindra P. PrabhuausOslo, NorwegenBonn 2010Angefertigt mit Genehmigung der Mathematisch-Naturwissenschaftlichen Fakult at derRheinisch Friedrich-Wilhelms-Universit at Bonn1. Gutachter: Prof. Dr. Klaus K. Desch2. Gutachter: Prof. Dr. Jochen DingfelderTag der Promotion: 27. Oktober 2010Erscheinungsjahr: 2011AbstractThe ATLAS experiment is currently recording data from proton-proton collisions de-livered by CERN’s Large Hadron Collider. As more data is amassed, studies of bothStandard Model processes and searches for new physics beyond will intensify. Thisdissertation presents a three-part study providing new methods to help facilitate thesee orts.The rst part presents a novel -reconstruction algorithm for ATLAS inspired by theideas of particle ow calorimetry. The algorithm is distinguished from traditional -reconstruction approaches in ATLAS, insofar that it seeks to recognize decay topologiesconsistent with a (hadronically) decaying -lepton using resolved energy ow objectsin the calorimeters. This procedure allows for an early classi cation of -candidatesaccording to their decay mode and the use of decay mode speci c discrimination againstfakes.