Bounds on photon scattering
Kelian Häring, Aditya Hebbar, Denis Karateev, Marco Meineri, João Penedones
Abstract
A bstract We study 2-to-2 scattering amplitudes of massless spin one particles in d = 4 space-time dimensions, like real world photons. We define a set of non-perturbative observables (Wilson coefficients) which describe these amplitudes at low energies. We use full non-linear unitarity to construct various novel numerical bounds on these observables. For completeness, we also rederive some bounds using positivity only. We discover and explain why some of these Wilson coefficients cannot be bounded.
Topics & Concepts
PhysicsUnitarityObservableMassless particleScattering amplitudeBounded functionScatteringPhotonCompleteness (order theory)AmplitudeMathematical physicsSpace (punctuation)Theoretical physicsQuantum mechanicsQuantum electrodynamicsMathematical analysisMathematicsLinguisticsPhilosophyParticle physics theoretical and experimental studiesBlack Holes and Theoretical PhysicsQuantum Chromodynamics and Particle Interactions