The $γ^\ast\to ηγ$ and $γ^\ast\to η'γ$ form factors to NNLO accuracy in perturbative QCD
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arXiv
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| Auteurs principaux: | , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866909852749529088 |
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| author | Braun, V. M. Chetyrkin, K. G. Manashov, A. N. |
| author_facet | Braun, V. M. Chetyrkin, K. G. Manashov, A. N. |
| contents | We use conformal symmetry to calculate the NNLO anomalous dimension matrix (three loops) for flavor-singlet axial-vector QCD operators for spin $N \le 8$ from a set of gauge-invariant two-point correlation functions. Combining this result with the recent calculation of the two-loop coefficient functions, we carry out the calculation of the $γγ^\ast\to η$ and $γγ^\ast\to η'$ form factors at large momentum transfers to the NNLO accuracy in perturbative QCD. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_15643 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The $γ^\ast\to ηγ$ and $γ^\ast\to η'γ$ form factors to NNLO accuracy in perturbative QCD Braun, V. M. Chetyrkin, K. G. Manashov, A. N. High Energy Physics - Phenomenology We use conformal symmetry to calculate the NNLO anomalous dimension matrix (three loops) for flavor-singlet axial-vector QCD operators for spin $N \le 8$ from a set of gauge-invariant two-point correlation functions. Combining this result with the recent calculation of the two-loop coefficient functions, we carry out the calculation of the $γγ^\ast\to η$ and $γγ^\ast\to η'$ form factors at large momentum transfers to the NNLO accuracy in perturbative QCD. |
| title | The $γ^\ast\to ηγ$ and $γ^\ast\to η'γ$ form factors to NNLO accuracy in perturbative QCD |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2510.15643 |