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arXiv · 2410.18674

Renormalization of the pseudoscalar operator at four loops in QCD

Long Chen·Michał Czakon·Marco Niggetiedt
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Abstract

We present the renormalization constant of the pseudoscalar operator defined with a non-anticommuting $\gamma_5$ 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 $\overline{\mathrm{MS}}$ factor of the renormalization constant for the latter at five-loop order in QCD.

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Long Chen, Michał Czakon, Marco Niggetiedt. 2024-10-24. Renormalization of the pseudoscalar operator at four loops in QCD. https://arxiv.org/abs/2410.18674

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