Question

Indicate, with an explanation, whether the following interactions proceed through the strong, electromagnetic or weak interactions, or whether they do not occur.

Answer 1

(i) Does not occur because energy is not conserved 

(ii) Weak interaction because neutrinos are involved 

(iii) Does not occur because lepton number is not conserved 

(iv) Weak interaction because leptons are involved 

(v) Does not occur because of non-conservation of baryon number and lepton number 

(vi) Electromagnetic interaction because γ -rays are involved, charge and c-parity are conserved. 

(vii) Occurs as strong interaction because strangeness is conserved 

(viii) Does not occur because strangeness is not conserved.