Speaker
Kevin Marc Brune
Description
The calculation of the branching ratio for the inclusive decay $\bar B \to X_s \gamma$ has been an active field of research for multiple decades, yielding results that work very well as a
standard candle of the Standard Model of Particle Physics (SM). In this work, we calculate the remaining pieces for the branching ratio of the four-body decay of a b quark into an s quark, a photon $\gamma$ and two additional quarks $q\bar{q}$ at NLO in the strong coupling $\alpha_s$. This calculation involves the one-loop process $b \rightarrow s \gamma q \bar q$, with a virtual gluon, as well as the tree-level contribution to $b \rightarrow s \gamma q \bar q g$.
Primary authors
Kevin Marc Brune
Lars-Thorben Moos
(University of Siegen)
Tobias Huber
(Siegen University)
