We present a compact analytic expression for the leading colour two-loop five-gluon amplitude in Yang-Mills theory with a single negative helicity and four positive helicities. The analytic result is reconstructed from numerical evaluations over finite fields. The numerical method combines integrand reduction, integration-by-parts identities and Laurent expansion into a basis of pentagon functions to compute the coefficients directly from six-dimensional generalised unitarity cuts.
Analytic helicity amplitudes for two-loop five-gluon scattering: the single-minus case / Badger S.; Bronnum-Hansen C.; Hartanto H.B.; Peraro T.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - ELETTRONICO. - 2019:1(2019), pp. 186.1-186.17. [10.1007/JHEP01(2019)186]
Analytic helicity amplitudes for two-loop five-gluon scattering: the single-minus case
Peraro T.
2019
Abstract
We present a compact analytic expression for the leading colour two-loop five-gluon amplitude in Yang-Mills theory with a single negative helicity and four positive helicities. The analytic result is reconstructed from numerical evaluations over finite fields. The numerical method combines integrand reduction, integration-by-parts identities and Laurent expansion into a basis of pentagon functions to compute the coefficients directly from six-dimensional generalised unitarity cuts.File | Dimensione | Formato | |
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