Hi there, I'm currently studying the decay modes of the Lambda baryon (uds). According to literature, the decay mode with leptons (e.g. Lambda -> p + e- + anti ve) is suppressed against the decay modes with pions (e.g. Lambda -> p + pi-) by a factor of about 10^-4. I was looking for the reason for this suppression, but could'nt find anything. Could anyone explain it to me? I was thinking that it might be due to parity, cause it's not conserved in weak interactions, but I'm not sure whether that's correct. Thanks in advance.