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arXiv · hep-ph/9505283

The Role of Lambda(1405) in Kaon-Proton Interactions

Chang-Hwan Lee·Dong-Pil Min·Mannque Rho
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Abstract

S-wave $K^-p$ scattering into various channels near threshold are analyzed in heavy-baryon chiral perturbation theory with $Λ(1405)$ introduced as an independent field. This is the approach that predicted the critical density $2<=ρ_c/ρ_0 <=3$ for negatively charged kaon condensation. We show that chiral perturbation expansion treating the $Λ(1405)$ as elementary is consistent with {\it all} threshold data including a double-charge-exchange process suppressed at leading order of chiral expansion in the absence of the $Λ(1405)$. We also discuss S-wave $K^+ p$ scattering phase shifts at low energy.

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Chang-Hwan Lee, Dong-Pil Min, Mannque Rho. 1995-06-15. The Role of Lambda(1405) in Kaon-Proton Interactions. https://doi.org/10.1016/0375-9474(96)00086-3

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