Measurement of decay parameters for Xi- --> Lambda pi- decay.
Phys Rev Lett
; 91(3): 031601, 2003 Jul 18.
Article
em En
| MEDLINE
| ID: mdl-12906410
ABSTRACT
Based on 1.35 x 10(6) polarized Xi(-) events, we measure the parameter phi(Xi) to be -1.61 degrees +/-2.66 degrees +/-0.37 degrees for the Xi(-)-->Lambda pi(-) decay. New results for the parameters beta(Xi) and gamma(Xi) are also presented. Assuming that the CP-violating phase difference is negligible, we deduce the strong phase difference between the P-wave and S-wave amplitudes of the Lambda pi final state to be 3.17 degrees +/-5.28 degrees +/-0.73 degrees, reducing the uncertainty in estimating the level of CP violation in Xi-hyperon decay.
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Ano de publicação:
2003
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Article