Factorization at 1/m_b for Inclusive B Decays.

por Francisco Campanario (University of Karlsruhe & University of Siegen)

martes 4 may. 2004 12:00 → 13:00 Europe/Madrid

Sala Seminarios (Dpto. de Física Teórica (UVEG))

I will present a proof of Factorization of hard, collinear and soft degrees of freedom at order 1/m for inclusive B decays. This will be achieved by means of effective theories in three steps:
1. Hadronic tensor up to 1/m.
2. Extraction of the hard Wilson coefficients.
3. Decoupling soft-collinear degrees of freedom.
As a result, the differential decay rate will be expressed as a convolution of Hard, Collinear and Soft functions. The first two, will be calculated in perturbation theory. The latter are non-perturbative objects, the shape functions, which are universal and appear in many processes.