Particle Physics — UPSC Physics Optional CSE 2012 Paper II

Which of the following reactions are permitted or forbidden by various conservation laws?

(i) k^{\mp}p \longrightarrow \Lambda^0 + \pi^0

(ii) k^+ + n \longrightarrow \Sigma^+ + \pi^0

(iii) \pi^{\mp}p \longrightarrow k^{\mp}\Sigma^+

(iv) \pi^+ + n \longrightarrow k^+ + \Lambda^0

(v) \pi^{\mp}p \longrightarrow \Lambda^0 + k^0

(vi) \pi^{\mp}p \longrightarrow k^+ + \Sigma^-