Two-loop leading colour helicity amplitudes for W^±γ+j production at the LHC release_djw7ijrztnd4zmpvqpyo53av3e

by Simon Badger, Heribertus Bayu Hartanto, Jakub Kryś, Simone Zoia

Released as a report .

2022  

Abstract

We present the two-loop leading colour QCD helicity amplitudes for the process pp→ W(→ lν)γ+j. We implement a complete reduction of the amplitudes, including the leptonic decay of the W-boson, using finite field arithmetic, and extract the analytic finite remainders using a recently identified basis of special functions. Simplified analytic expressions are obtained after considering permutations of a rational kinematic parametrisation and multivariate partial fractioning. We demonstrate efficient numerical evaluation of the two-loop colour and helicity summed finite remainders for physical kinematics, and hence the suitability for phenomenological applications.
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Type  report
Stage   submitted
Date   2022-01-11
Version   v1
Language   en ?
Number  CAVENDISH-HEP-22/01
arXiv  2201.04075v1
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