# Strong Lambda pi phase shifts for CP violation in weak Xi ---> Lambda pi decay

@article{Lu1994StrongLP,
title={Strong Lambda pi phase shifts for CP violation in weak Xi ---> Lambda pi decay},
author={M. Lu and M. Savage and M. Wise},
journal={Physics Letters B},
year={1994},
pages={133-136}
}
• Published 1994
• Physics
• Physics Letters B
• Strong interaction $\Lambda\pi$ phase shifts relevant for the weak nonleptonic decay $\Xi \rightarrow \Lambda \pi$ are calculated using baryon chiral perturbation theory. We find in leading order that the S-wave phase shift vanishes and the $J={1 \over 2}$ P-wave phase shift is $-1.7 ^{\rm o}$. The small phase shifts imply that CP violation in this decay will be difficult to observe. Our results follow from chiral $SU(2)_L\times SU(2)_R$ symmetry.