Theory seminar (11am): Kay Schönwald: Higher order corrections to inclusive B decays

Thursday 10 Apr 2025, 11:00 → 12:00 Europe/Amsterdam

Veltman Centre (Nikhef)

The decay of B mesons can be systematically predicted within the Heavy Quark Expansion.

The leading term in the expansion corresponds to the decay of a free bottom quark,

while higher order corrections are suppressed by powers of $1/m_b$. 

In my talk I report on the calculation of higher order corrections to the free bottom quark

decay. This comprises N3LO corrections to the semileptonic decay and NNLO corrections 

to nonleptonic decays considering the four-quark operators $O_1$ and $O_2$.

In particular I will address several challenges that arise in the leptonic decays like the 

treatment of ${\gamma }_5$ in dimensional regularization and the semi-analytic calculation 

of the master integrals and present updated predictions for the lifetimes of B mesons.