Three-Loop Mixing of Dipole Operators

Preprint

21 April 2005

preprint
Published by arXiv in arXiv

Abstract

We calculate the complete three-loop O(alpha_s^3) 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 -> X_s gamma decay.

Keywords

ANOMALOUS DIMENSION
MATRIX OF OPERATORS
DIPOLE OPERATORS
DIMENSION MATRIX
STANDARD MODEL
LOOP MIXING
ALPHA_S
QCD

All Related Versions

Version 1, 2005-04-21, ArXiv
Version 2, 2005-08-15, ArXiv
Published version: Physical Review Letters, 95 (10), 102004.

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