Effective model for in-medium (K)over-barN interactions including the L=1 partial wave

Coupled channels model of meson-baryon interactions based on the effective chiral Lagrangian is extended to account explicitly for the Sigma(1385) resonance that dominates the P-wave (K) over barN and pi Sigma interactions at energies below the (K) over barN threshold. The presented model aims at a uniform treatment of the Lambda(1405) and Sigma(1385) dynamics in the nuclear medium. We demonstrate the applicability of the model by confronting its predictions with the vacuum scattering data, then we follow with discussing the impact of nuclear matter on the pi Sigma mass spectrum and on the energy dependence of the K- p branching ratios. (C) 2015 Published by Elsevier B.V.