Standard Model and Beyond · Problem 2.20

Lie Groups, Lie Algebras, and Symmetries

Physics — Particle Physics · electron-muon-cm-cross-section

Problem

Calculate the CM differential cross section for the process

e^-(\vec{p}_1)\mu^+(\vec{k}_1) \to e^-(\vec{p}_2)\mu^+(\vec{k}_2)

in terms of

s = E_{CM}^2

, the CM scattering angle

\theta

, and the muon mass

m_\mu

. Neglect the electron mass.