Effects of R-parity violation on CP asymmetries in ${\Lambda }_b\to p\pi$ decay

Abstract

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.

Comments: Latex, 8 pages