Description
In this talk I will discuss selected aspects of our calculation of the previously unknown NNLO QCD corrections to the $B_s - \bar{B}_s$ mixing process. These contributions are required to reduce the existing theory uncertainty on $\Delta \Gamma_{12}^s$, the flavor mixing parameter governing lifetime differences of neutral $B_s$ mesons.
Speaker
Vladyslav Shtabovenko
(KIT)
