# 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} }

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.

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