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  Four-particle scattering amplitudes in QCD at NNLO to higher orders in the dimensional regulator

Ahmed, T., Henn, J., & Mistlberger, B. (2019). Four-particle scattering amplitudes in QCD at NNLO to higher orders in the dimensional regulator. Journal of High Energy Physics, 1912, 177. Retrieved from https://publications.mppmu.mpg.de/?action=search&mpi=MPP-2019-129.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-D705-3 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-D706-2
Genre: Journal Article

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 Creators:
Ahmed, Taushif1, Author
Henn, Johannes1, Author
Mistlberger, Bernhard1, Author
Affiliations:
1Max Planck Institute for Physics, Max Planck Society and Cooperation Partners, ou_2253650              

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Free keywords: Phenomenology of High Energy Physics
 Abstract: We compute all helicity amplitudes for four-particle scattering in massless QCD with $n_f$ fermion flavours to next-to-next-to-leading order (NNLO) in perturbation theory. In particular, we consider all possible configurations of external quarks and gluons. We evaluate the amplitudes in terms of a Laurent series in the dimensional regulator to the order required for future next-to-next-to-next-to-leading order (N$^3$LO) calculations. The coefficients of the Laurent series are given in terms of harmonic polylogarithms that can readily be evaluated numerically. We present our findings in the conventional dimensional regularisation and in the t'Hooft-Veltman schemes.

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 Dates: 2019
 Publication Status: Published in print
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Title: Journal of High Energy Physics
  Abbreviation : JHEP
Source Genre: Journal
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Publ. Info: -
Pages: - Volume / Issue: 1912 Sequence Number: - Start / End Page: 177 Identifier: -