Theorie-Palaver

 May 25, 2010 at 1 p.m. in Sozialraum der WA THEP

Upalaparna Banerjee

Federico Gasparotto

Pouria Mazloumi

Yong Xu

Note: geänderte Uhrzeit: 13:00s.t.

Irreducible Uncertainties in B → X_s γ Decay
Dipl. Phys. Michael Benzke (Institut für Physik - ThEP)


The decay rate of B → X_s γ is considered.
Subleading contributions in the 1/m_b expansion obey a new factorization formula which introduces a new type of soft function, that is not perturbatively calculable. Their effect on the partially integrated rate is estimated.