Measurement of beauty and charm photoproduction using inclusive secondary vertexing with the ZEUS detector at HERA [Elektronische Ressource] / by Verena Ellen Schönberg. [Universität Bonn, Physikalisches Institut]

..UNIVERSITAT BONNPhysikalisches InstitutMeasurement of beauty and charmphotoproductionusing inclusive secondary vertexingwith the ZEUS detector at HERAbyVerena Ellen Sch¨onbergPhotoproduction of heavy quarks in events with two jets has been measuredwith the ZEUS detector at HERA using data recorded in the years 2006–−12007 corresponding to an integrated luminosity of 128pb . The beautyand charm content was extracted using the decay-length significance of theb and c hadrons and the invariant mass of the decay vertices. DifferentialJet Jetcross sections asafunction ofP andη were comparedwith thePythiaTleading order plus parton shower Monte Carlo and QCD predictions calcu-lated at next-to-leading order. In order to study the theoretical descriptionof higher-order effects correlations between the two highest energy jets werealso investigated.Postal address: BONN-IR-2010-05Nußallee 12 Bonn UniversityD-53115 Bonn April 2010Germany ISSN-0172-8741..UNIVERSITAT BONNPhysikalisches InstitutMeasurement of beauty and charmphotoproductionusing inclusive secondary vertexingwith the ZEUS detector at HERAbyVerena Ellen Sch¨onbergDieser Forschungsbericht wurde als Dissertation von der Mathematisch-Natur-wissenschaftlichen Fakult¨at der Universita¨t Bonn angenommen und ist auf demHochschulschriftenserverderULBBonnhttp://hss.ulb.uni-bonn.de/diss onlineelek-tronisch publiziert.Referent: Prof.Dr.IanC.BrockKorreferent: Prof.Dr.NorbertWermesAngenommen am: 21.