Speaker
Pascal Reeck
(KIT TTP)
Description
In this talk I will discuss recent advances made in the calculation of the NNLO QCD corrections to the width difference between B and B mesons. This work focuses on the perturbative high-energy part of the calculation, more specifically the matching coefficients between the Δ B = 1 effective operators of the Weak Interaction and the Δ B = 2 transition operator are calculated as a deep expansion in mc/mb.
This calculation yields novel results for the NNLO contributions with penguin operators which had not been considered previously at this order. Moreover, the NNLO contributions with two current-current operators, which were previously only known up to O(mc/mb), are calculated to a higher precision.
Primary authors
Matthias Steinhauser
(KIT)
Pascal Reeck
(KIT TTP)
Ulrich Nierste
(Karlsruhe Institute of Technology)
Dr
Vladyslav Shtabovenko
(University of Siegen)
