Matching conditions for b→sγ and b→s gluon in extensions of the Standard Model Original Research Article

We evaluate matching conditions for the Wilson coefficients of operators mediating the b→sγ and b→s gluon transitions in a large class of extensions of the Standard Model. The calculation is performed at the leading order in flavour-changing couplings and includes two-loop QCD corrections. These corrections can be numerically important when approximate cancellations occur among the new physics contributions and/or the SM one.