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Renormalization of the flavor-singlet axial-vector current and its anomaly in dimensional regularization

Aug 11, 2022, 2:30 PM
15m
Oral report 强子物理与味物理 Parallel Session IX (2):Hadron and Flavor Physics

Speaker

Dr Long Chen (Shandong University)

Description

The renormalization constant of the flavor-singlet axial-vector current operator with a non-anticommuting $\gamma_5$ in dimensional regularization is determined to order $\alpha_s^5$ in QCD with massless quarks. The result is obtained from a four-loop calculation by the virtue of a formula derived using the Adler-Bell-Jackiw equation in terms of renormalized operators. A possible application of this result for resumming the non-decoupling mass logarithms in the axial quark form factors will be discussed.

Primary author

Dr Long Chen (Shandong University)

Co-author

Prof. Michal Czakon (RWTH Aachen University)

Presentation materials