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Three-Loop Mixing of Dipole Operators

Martin Gorbahn, Ulrich Haisch, Mikolaj Misiak

hep-pharXiv:hep-ph/0504194

Abstract

We calculate the complete three-loop O(alphas3) anomalous dimension matrix for the dimension-five dipole operators that arise in the Standard Model after integrating out the top quark and the heavy electroweak bosons. Our computation completes the three-loop anomalous dimension matrix of operators that govern low-energy |Delta F| = 1 flavor-changing processes, and represents an important ingredient of the next-to-next-to-leading order QCD analysis of the Bbar -> Xs gamma decay.

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