Dresden 2013 – scientific programme
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T: Fachverband Teilchenphysik
T 18: Flavourphysik (Theorie) 1
T 18.7: Talk
Monday, March 4, 2013, 12:30–12:45, WIL-B122
Charm lifetimes within the Heavy Quark Expansion — •Thomas Rauh1 and Alexander Lenz2,3 — 1TU München, Physik Department, Deutschland — 2IPPP Department of Physics, University of Durham, United Kingdom — 3CERN - Theory Divison, Geneva, Switzerland
Recent experimental results show an unexpectedly large amount of CP violation in the charm sector. To decide whether this is a sign for new physics, accurate control over the standard model prediction is needed. Charm physics poses considerable theoretical challenges, because the charm mass is neither light nor truly heavy. The Heavy Quark Expansion (HQE) provides a perturbative expansion in the inverse heavy quark mass for inclusive rates. It proved to be very successful in the B sector, yet its validity for charm decays has often been questioned. We present results of a HQE study of charm lifetimes and discuss implications on the HQE in charm.