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arXiv · 2212.14069

Three-loop helicity amplitudes for photon+jet production

Piotr Bargiela·Amlan Chakraborty·Giulio Gambuti
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Abstract

We present three-loop helicity amplitudes for the production of a single photon in association with one jet in Quantum Chromodynamics, a final state which provides a standard candle of the Standard Model at the Large Hadron Collider. We employ a recently-proposed variation of the so-called tensor projection method in the 't Hooft-Veltman scheme (tHV) which avoids the computation of contributions due to unphysical (-2$\epsilon$)-dimensional polarisations of the external states. We obtain compact analytic results expressed in terms of harmonic polylogarithms.

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Piotr Bargiela, Amlan Chakraborty, Giulio Gambuti. 2022-12-28. Three-loop helicity amplitudes for photon+jet production. https://doi.org/10.1103/physrevd.107.l051502

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