QCD challenges in radiative B decays

Understand

Radiative decays of the B meson are known to provide important constraints on the MSSM and many other realistic new physics models in the sub-TeV range.

• The inclusive branching ratio BR(B -> Xs gamma) being the key observable is currently measured to about 7% accuracy.
• Reaching a better precision on the theory side is a challenge both for the perturbative QCD calculations and for analyses of non-perturbative hadronic effects.
• The current situation is briefly summarized here.