b --> s gamma confronts B-violating scalar couplings: R-parity violating   supersymmetry or diquark
  We investigate the possible role that baryon number violating Yukawa interactions may take in the inclusive decay $ B \to X_s \gamma$. The constraints, derived using the experimental results of the CLEO collaboration, turn out, in many cases, to be more stringent than the existing bounds. 
Debrupa Chakraverty and Debajyoti Choudhury