Measurement of decay parameters for Ξ-→Λπ- decay -: art. no. 031601

被引：25

作者：

Chakravorty, A ^{[1
]}

Diehl, HT

Duryea, J

Guglielmo, G

Heller, K

Ho, PM

James, C

Johns, K

Kaplan, DM

Longo, MJ

Luk, KB

Rameika, R

Rubin, HA

Teige, S

Thomson, GB

Zou, Y

机构：

[1] IIT, Div Phys, Chicago, IL 60616 USA

[2] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[3] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Phys, Berkeley, CA 94720 USA

[4] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA

[5] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA

[6] Univ Minnesota, Sch Phys, Minneapolis, MN 55455 USA

[7] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 91卷 / 03期

关键词：

D O I：

10.1103/PhysRevLett.91.031601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Based on 1.35x10(6) polarized Xi(-) events, we measure the parameter phi(Xi) to be -1.61degrees+/-2.66degrees+/-0.37degrees for the Xi(-)-->Lambdapi(-) 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 Lambdapi final state to be 3.17degrees+/-5.28degrees+/-0.73degrees, reducing the uncertainty in estimating the level of CP violation in Xi-hyperon decay.

引用

页数：4

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