Griffiths Introduction to Elementary Particles · Problem 4.30

Bound States — David J. Griffiths

Physics — QFT · isospin-kaon-reactions

Problem

What are the possible total isospins for the following reactions: (a)

K^+ + p \to \Sigma^+ + \pi^+

; (b)

K^- + p \to \Sigma^+ + \pi^-

. Find the ratio of the two cross sections, assuming one or the other isospin channel dominates.