EFT Coffee: Mikolaj Misiak, "NNLO QCD corrections to $\bar{B} \to X_s \gamma$ without interpolation in $m_c$"

Friday 21 Feb 2025, 13:15 → 14:30 Europe/Zurich

4/2-037 - TH meeting room (CERN)

Meeting for informal discussion of EFT-related topics. 
List of potential papers to be discussed

13:15 → 13:30 Coffee

13:30 → 14:30 NNLO QCD corrections to $\bar{B} \to X_s \gamma$ without interpolation in $m_c$

A recently completed calculation of NNLO QCD corrections to the weak radiative $B$-meson decay is going to be reported. Contrary to previous estimates of these corrections, no interpolation in the charm quark mass is necessary. To achieve this goal, hundreds of four-loop propagator diagrams with unitarity cuts had to be calculated in the framework of the Low-Energy Effective Field Theory (LEFT) that is obtained from the SM via decoupling of the $W$ boson and heavier particles.

Speaker: Mikolaj Krzysztof Misiak (University of Warsaw (PL))