Higher order QCD corrections in exclusive charmless B-decays [Elektronische Ressource] / vorgelegt von Guido Bell

Fakult˜at fur˜ PhysikderLudwig-Maximilians-Universit˜at Munchen˜HIGHER ORDER QCD CORRECTIONSIN EXCLUSIVE CHARMLESS B DECAYSGUIDO BELLOktober 2006Dissertation der Fakult˜at fur˜ PhysikderLudwig-Maximilians-Universit˜at Munchen˜HIGHER ORDER QCD CORRECTIONSIN EXCLUSIVE CHARMLESS B DECAYSvorgelegt vonGUIDO BELLausNeuwied am RheinMunchen,˜ den 31. Oktober 2006Dissertation der Fakult˜at fur˜ Physikder Ludwig-Maximilians-Universit˜at Munc˜ henvorgelegt von Dipl.-Phys. Guido Bellaus Neuwied am Rhein1. Gutachter: Univ.-Prof. Dr. Gerhard Buchalla2. Gutachter: Priv.-Doz. Dr. Stefan DittmaierTag der mundlic˜ hen Prufung:˜ 13. Dezember 2006AbstractWe discuss exclusive charmless B decays within the Standard Model of particlephysics. These decays play a central role in the on-going process to constrain theparametersoftheCKMmatrixandtoclarifythenatureofCPviolation. Inordertoexploit the rich source of data that is currently being collected at the experiments,asystematictheoreticaltreatmentofthecomplicatedhadronicdynamicsisstronglydesired. QCD Factorization represents a model-independent framework to computehadronic matrix elements from flrst principles. It is based on a power expansion in⁄ =m and allows for the systematic implementation of perturbative corrections.QCD bIn particular, we consider hadronic two-body decays as B!