One-loop QCD helicity amplitudes for pp -> tt(over)j to O(ε2)

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  • Simon Badger
  • Matteo Becchetti
  • Ekta Chaubey
  • Robin Marzucca
  • Francesco Sarandrea

We compute helicity amplitudes for the one-loop QCD corrections to top-quark pair production analytically in terms of a set of uniformly transcendental master integrals. We provide corrections up to O(epsilon(2)) in the dimensional regulator for the first time which are relevant at NNLO. Four independent pentagon integral topologies appear in the complete description of the colour structure for which we provide numerical solutions using canonical form differential equations and the method of generalised power series expansions. Analytic forms of the boundary values are obtained in all cases except one where we find a one-dimensional integral representation.

Original languageEnglish
Article number66
JournalJournal of High Energy Physics (Online)
Volume2022
Issue number6
Number of pages35
ISSN1126-6708
DOIs
Publication statusPublished - 13 Jun 2022

Bibliographical note

37 pages. ancillary files containing analytic amplitudes and integral evaluation routines. v2 references added

    Research areas

  • Higher-Order Perturbative Calculations, Top Quark, QUARK PAIR PRODUCTION, DIFFERENTIAL-EQUATIONS, INTEGRATION, ALGORITHM, JET

ID: 301443001