$πΛ$ phase shifts and CP Violation in ${Ξ\to πΛ}$ Deca

Details $πΛ$ phase shifts and CP Violation in ${Ξ\to πΛ}$ Deca $πΛ$ phase shifts and CP Violation in ${Ξ\to πΛ}$ Deca

2004-02-09

arxiv.org/abs/hep-ph/0402093v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 2 figures

Scientific paper

The CP violation asymmetry parameters in $\Xi \to\pi\Lambda$ nonleptonic decays are presently being measured by the HyperCP experiment. In the study of these CP violation parameters, the strong $S$ and $P$ phase shifts for the $\pi\Lambda$ final-state interactions are needed. In this work, these phases are calculated using an effective chiral Lagrangian model, that considers $\Sigma$, $\Sigma^*$(1385), and the $\sigma$-term, in the intermediate states. The $\sigma$-term is calculated in terms of the scalar form factor of the baryon.

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