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Chiral Dynamics of Low-Energy Kaon-Baryon Interactions with Explicit Resonance

B. Krippa·J. T. Londergan
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Abstract

The processes involving low energy $\bar{K}N$ and $Yπ$ interactions (where $Y= Σ$ or $Λ$) are studied in the framework of heavy baryon chiral perturbation theory with the $Λ$(1405) resonance appearing as an independent field. The leading and next-to-leading terms in the chiral expansion are taken into account. We show that an approach which explicitly includes the $Λ$(1405) resonance as an elementary quantum field gives reasonable descriptions of both the threshold branching ratios and the energy dependence of total cross sections.

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B. Krippa, J. T. Londergan. 1998-05-05. Chiral Dynamics of Low-Energy Kaon-Baryon Interactions with Explicit Resonance. https://doi.org/10.1103/physrevc.58.1634

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