Two-loop leading colour QCD corrections to $$ q\overline{q} $$ → γγg and qg → γγq
Bakul Agarwal, Federico Buccioni, Andreas von Manteuffel, Lorenzo Tancredi
Abstract
A bstract We present the leading colour and light fermionic planar two-loop corrections for the production of two photons and a jet in the quark-antiquark and quark-gluon channels. In particular, we compute the interference of the two-loop amplitudes with the corresponding tree level ones, summed over colours and polarisations. Our calculation uses the latest advancements in the algorithms for integration-by-parts reduction and multivariate partial fraction decomposition to produce compact and easy-to-use results. We have implemented our results in an efficient C++ numerical code. We also provide their analytic expressions in Mathematica format.
Topics & Concepts
PhysicsQuantum chromodynamicsPhotonParticle physicsAmplitudeJet (fluid)PlanarInterference (communication)Reduction (mathematics)Tree (set theory)Theoretical physicsMathematical physicsQuantum electrodynamicsDecompositionGluonProduction (economics)Feynman graphPomeronElectron–positron annihilationParticle physics theoretical and experimental studiesQuantum Chromodynamics and Particle InteractionsComputational Physics and Python Applications