Griffiths Introduction to Elementary Particles · Problem 6.14

Quantum Electrodynamics — David J. Griffiths

Physics — QFT · abc-theory-scattering

Problem

Find

d\sigma/d\Omega

and

\sigma

for

A + A \to B + B

in the lab frame. (Let

E

be the energy, and

\mathbf{p}

the momentum, of the incident

A

. Assume

m_B = m_C = 0

.) Determine the nonrelativistic and ultrarelativistic limits of your formula.