Renormalization of the pseudoscalar operator at four loops in QCD

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2024年12月5日

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Long Chen,
Michał Czakon,
Marco Niggetiedt

摘要

We present the renormalization constant of the pseudoscalar operator defined with a non-anticommuting γ₅ in dimensional regularization up to four-loop order in perturbative Quantum Chromodynamics (QCD). Furthermore, by virtue of renormalization-group invariance of the relation between the scalar and the pseudoscalar operator, we predict the $\bar{MS}$ $ \overline{\textrm{MS}} $ factor of the renormalization constant for the latter at five-loop order in QCD.