Electroweak corrections to $gg\rightarrow γγ$
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arXiv
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866918235440414720 |
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| author | Fiore, Gabriele Williams, Ciaran |
| author_facet | Fiore, Gabriele Williams, Ciaran |
| contents | We present the electroweak corrections for the production of a photon pair through gluon fusion, focusing on the contribution from the first two generations of quarks. The two-loop amplitude is calculated using a series of projection operators which define scalar form factors. In order to evaluate the Master Integrals which appear in this process we employ both generalized polylogarithms and Chen-iterated integrals. In order to perform a phenomenological study we develop a semi-numerical evaluation of the Master Integrals employing a fitting procedure to speed up the evaluation of burdensome higher weight contributions. We present results for the LHC, finding corrections of around a couple of percent to the leading order $gg \rightarrow γγ$ process. Our results are implemented into the parton-level Monte Carlo code \texttt{MCFM}. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2510_21643 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Electroweak corrections to $gg\rightarrow γγ$ Fiore, Gabriele Williams, Ciaran High Energy Physics - Phenomenology We present the electroweak corrections for the production of a photon pair through gluon fusion, focusing on the contribution from the first two generations of quarks. The two-loop amplitude is calculated using a series of projection operators which define scalar form factors. In order to evaluate the Master Integrals which appear in this process we employ both generalized polylogarithms and Chen-iterated integrals. In order to perform a phenomenological study we develop a semi-numerical evaluation of the Master Integrals employing a fitting procedure to speed up the evaluation of burdensome higher weight contributions. We present results for the LHC, finding corrections of around a couple of percent to the leading order $gg \rightarrow γγ$ process. Our results are implemented into the parton-level Monte Carlo code \texttt{MCFM}. |
| title | Electroweak corrections to $gg\rightarrow γγ$ |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2510.21643 |