Amplitudes, observables, and classical scattering

• Published in: The journal of high energy physics Vol. 2019; no. 2; pp. 1 - 69
• Main Authors: Kosower, David A., Maybee, Ben, O’Connell, Donal
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.02.2019; Springer Nature B.V; Springer; SpringerOpen
• Subjects: Amplitudes; Classical and Quantum Gravitation; Classical Theories of Gravity; Electrodynamics; Elementary Particles; General Relativity and Quantum Cosmology; High energy physics; High Energy Physics - Theory; Momentum transfer; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Regular Article - Theoretical Physics; Relativity Theory; Scattering; Scattering Amplitudes; String Theory; Classical Theories of Gravity; Scattering Amplitudes; scattering: classical; electromagnetic field; spinless; scattering amplitude; higher-order: 1; momentum transfer

A bstract We present a formalism for computing classically measurable quantities directly from on-shell quantum scattering amplitudes. We discuss the ingredients needed for obtaining the classical result, and show how to set up the calculation to derive the result efficiently. We do this without spe...