Two - loop matching of the dipole operators for b → sγ and b → sg 1 Christoph
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چکیده
The order αs corrections to the Wilson coefficients of the dipole operators (O7, O8) at the matching scale μ = mW are a crucial ingredient for a complete next-to-leading logarithmic calculation of the branching ratio for b → sγ. Given the phenomenological relevance and the fact that this two-loop calculation has been done so far only by one group [1], we present a detailed re-calculation using a different method. Our results are in complete agreement with those in ref. [1]. Work supported in part by Schweizerischer Nationalfonds
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تاریخ انتشار 1997