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

C. C. Barros Jr
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Abstract

The CP violation asymmetry parameters in $Ξ\toπΛ$ 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 $πΛ$ final-state interactions are needed. In this work, these phases are calculated using an effective chiral Lagrangian model, that considers $Σ$, $Σ^*$(1385), and the $σ$-term, in the intermediate states. The $σ$-term is calculated in terms of the scalar form factor of the baryon.

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C. C. Barros Jr. 2004-02-09. $πΛ$ phase shifts and CP Violation in ${Ξ\to πΛ}$ Deca. https://arxiv.org/abs/hep-ph/0402093

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