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The pion-photon transition form factor at two loops in QCD
by Jing Gao, Tobias Huber, Yao Ji, Yu-Ming Wang
Submission summary
As Contributors: | Tobias Huber |
Arxiv Link: | https://arxiv.org/abs/2110.14776v1 (pdf) |
Date accepted: | 2022-02-28 |
Date submitted: | 2021-10-29 16:20 |
Submitted by: | Huber, Tobias |
Submitted to: | SciPost Physics Proceedings |
Proceedings issue: | RADCOR 2021 (15th International Symposium on Radiative Corrections: Applications of Quantum Field Theory to Phenomenology) |
Academic field: | Physics |
Specialties: |
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Approaches: | Theoretical, Phenomenological |
Abstract
We report on the fully analytic calculation of the leading-power contribution to the photon-pion transition form factor $\gamma \, \gamma^{\ast} \to \pi^0$ at two loops in QCD. The applied techniques are based on hard-collinear factorization, together with modern multi-loop methods. We focus both, on the technical details such as the treatment of evanescent operators, and the phenomenological implications. Our results indicate that the two-loop correction is numerically comparable to the one-loop effect in the same kinematic domain. We also demonstrate that our results will play a key role in disentangling various models for the twist-two pion distribution amplitude thanks to the envisaged precision at Belle II.
Current status:
Editorial decision:
For Journal SciPost Physics Proceedings: Publish
(status: Editorial decision fixed and (if required) accepted by authors)
Submission & Refereeing History
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Reports on this Submission
Anonymous Report 1 on 2021-11-27 (Invited Report)
Strengths
The article reports on the work presented at RADCOR/LoopFest 2021. It fulfills all the requirements for publication in SciPost Proceedings.
Weaknesses
None.
Report
The article reports on the work presented at RADCOR/LoopFest 2021. It fulfills all the requirements for publication in SciPost Proceedings and therefore we recommend its publication.
Requested changes
None.