Effects of R-parity violation on CP asymmetries in $\Lambda_b \to p \pi$ decay

We have studied new CP violating effects in $\Lambda_b \to p \pi$ decay mode, that can arise in Minimal Supersymmetric Standard Model with R-parity violation. We have estimated how much R-parity violation modifies the Standard Model predictions for CP asymmetries within the present bounds. We found that in the R-parity violating model, the rate asymmetry ($a_{cp}$) is suppressed (about 10 times) and the asymmetry parameter $A(\alpha)$ is enhanced (approximately $10^2$ times) with respect to the SM predictions.