Three-loop helicity amplitudes for diphoton production in gluon fusion
| Autor: | Piotr Bargieła, Fabrizio Caola, Andreas von Manteuffel, Lorenzo Tancredi |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
High Energy Physics - Theory
Nuclear and High Energy Physics High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) High Energy Physics - Theory (hep-th) Computer Science::Information Retrieval High Energy Physics::Lattice High Energy Physics::Phenomenology FOS: Physical sciences |
| Zdroj: | Journal of High Energy Physics |
| Popis: | We present a calculation of the helicity amplitudes for the process $gg\to\gamma\gamma$ in three-loop massless QCD. We employ a recently proposed method to calculate scattering amplitudes in the 't Hooft-Veltman scheme that reduces the amount of spurious non-physical information needed at intermediate stages of the computation. Our analytic results for the three-loop helicity amplitudes are remarkably compact, and can be efficiently evaluated numerically. This calculation provides the last missing building block for the computation of NNLO QCD corrections to diphoton production in gluon fusion. Comment: 5 figures, 1 table, ancillary files with analytical results |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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