Dresden 2013 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

T: Fachverband Teilchenphysik

T 18: Flavourphysik (Theorie) 1

T 18.5: Vortrag

Montag, 4. März 2013, 12:00–12:15, WIL-B122

Symmetry-violation effects in the decay constants of heavy-light mesons — Patrick Gelhausen, Alexander Khodjamirian, Alexei A. Pivovarov, and •Denis Rosenthal — Universität Siegen, Deutschland

Due to the wealth of information on heavy-flavoured hadron decays provided by B-factories and hadronic colliders in recent years, precise theoretical predictions for the hadronic parameters are required for a comparison between the experiment and the Standard Model with its extensions. We revisit and extend the QCD sum rule analyses of decay constants of heavy bottom and charmed mesons with spin parity J^P=0⁻ and 1⁻ (B_s^(*), D_s^(*), B^(*) and D^(*)). Predicting the ratios of the corresponding decay constants, we gain access to the violation of various symmetries, such as the SU(3) flavour-breaking, the heavy-quark spin- and flavour-symmetry violating effects. The latter are compared to 1/m_Q-corrections derived in HQET.