Jul 16 – 22, 2009
Kraków, Poland
Europe/Warsaw timezone

Renormalization of B-meson distribution amplitudes

Jul 16, 2009, 11:00 AM
20m
Exhibition room B (Kraków, Poland)

Exhibition room B

Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
QCD in hadronic physics VI. QCD in Hadronic Physics

Speaker

Dr Sébastien Descotes-Genon (LPT Orsay (CNRS/Univ. Paris Sud 11))

Description

We study some properties of light-cone distribution amplitudes of B-mesons, which are a key ingredient for factorisation approaches for B-meson decays. We determine how two-parton distribution amplitudes mix with three-parton ones at one loop: \phi_+ is shown to mix only into itself, whereas \phi_- mixes with the difference of three-parton distribution amplitudes \Psi_A-\Psi_V. We determine the corresponding anomalous dimension and confirm some constraints on \phi_+ and \phi_- derived from the light-quark equation of motion. Finally, we comment on some implications of our result for phenomenological models of these distribution amplitudes.

Primary author

Dr Sébastien Descotes-Genon (LPT Orsay (CNRS/Univ. Paris Sud 11))

Co-author

Dr Nils Offen (LPT Orsay (CNRS/Univ. Paris Sud 11))

Presentation materials