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Preprint February 2026

QCD Scattering Amplitudes and Prescriptive Unitarity

Sérgio Carrôlo, Dmitry Chicherin, Johannes Henn, Qinglin Yang, Yang Zhang

  • Quantum Chromodynamics
  • Scattering Amplitudes
  • Unitarity
arXiv:2602.02783 INSPIRE
Fig. 7 of the paper: all six-point two-loop prescriptive unitarity integrals for the IR-finite part of MHV amplitudes, up to dihedral permutations of the external legs.
Fig. 7 of the paper: all six-point two-loop prescriptive unitarity integrals for the IR-finite part of MHV amplitudes, up to dihedral permutations of the external legs.

Usually bootstrap approaches start with a naive ansatz: match all possible functions with all possible pre-factors. Prescriptive unitarity gives us a guiding principle in which all the finite IR parts are completely fixed. We bootstrap the remaining free coefficients by imposing consistency with physical limits.