Two-loop massive QCD and QED helicity amplitudes for light-by-light scattering
A. H. Ajjath, Ekta Chaubey, Hua-Sheng Shao
Abstract
A bstract We present the analytic and compact two-loop helicity amplitudes for QCD and QED corrections to the light-by-light scattering process with massive internal fermions. We express the master integrals either in terms of multiple polylogarithms or in terms of iterated integrals with dlog one-forms. We also elaborate on optimising the analytic results for each phase-space region. This makes the numerical evaluation of the scattering amplitudes fast, stable and suitable for phenomenological applications.
Topics & Concepts
PhysicsHelicityQuantum chromodynamicsScattering amplitudeFermionAmplitudeQuantum electrodynamicsScatteringParticle physicsGluonQuantum mechanicsParticle physics theoretical and experimental studiesQuantum Chromodynamics and Particle InteractionsBlack Holes and Theoretical Physics