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

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

1995-05-12

arxiv.org/abs/hep-ph/9505283v4

Nucl.Phys. A602 (1996) 334-346

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, epsfig.sty, 1 figure (uuencoded)

Scientific paper

S-wave $K^-p$ scattering into various channels near threshold are analyzed in heavy-baryon chiral perturbation theory with $\Lambda (1405)$ introduced as an independent field. This is the approach that predicted the critical density $2<=\rho_c/\rho_0 <=3$ for negatively charged kaon condensation. We show that chiral perturbation expansion treating the $\Lambda (1405)$ 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 $\Lambda (1405)$. We also discuss S-wave $K^+ p$ scattering phase shifts at low energy.

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