Matching Conditions for $b\to s\gamma$ and $b\to sgluon$ in Extensions of the Standard Model

Abstract

We evaluate matching conditions for the Wilson coefficients of operators mediating the $b\to s\gamma$ and $b\to sgluon$ transitions in a large class of extensions of the Standard Model. The calculation is performed at the leading order in flavor-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.

26 pages, 3 figures, uses epsfig.sty

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