Navigation auf uzh.ch

Suche

Physik-Institut

(Semi)leptonic B Decays: Form Factors and New Physics Searches

Danny van Dyk (UZH)

Tuesday, 20 October 2015 at 11:15 in Y36 J33

Abstract

I will review the status of semileptonic b -> u decays, which manifest in the exclusive decays B->tau nu, B->pi mu nu, and the inclusive decays B->X_u mu nu. Determinations of V_ub from exclusive and inclusive determinations show a tension at the level of 3 sigma. I will introduce QCD sum rules, and show how they permit the calculation of hadronic matrix elements that are crucial for exclusive determinations of V_ub. Subsequently, I will explore whether the V_ub tension can be explained in a New Physics context.