HEP Theory Journal Club

Analytical On-shell Calculation of Higher Order Scattering

Zahra Zahraee

McGill

I will discuss the recent paper “Analytical On-shell Calculation of Higher Order Scattering: Massive Particles” (Arxiv:1610.07957v1) by B.R. Holstein. In this paper, he demonstrates the use of on-shell methods, involving calculation of discontinuity across the t-channel cut associated with the exchange of a pair of massless particles, can be used to evaluate loop contributions to both the electromagnetic and gravitational scattering of massive systems. In the gravitational case, the higher order corrections can be used to study the precession of the orbits.