Eur. Phys. J. A (2016) 52: 279
https://doi.org/10.1140/epja/i2016-16279-6

Regular Article - Theoretical Physics

Eta and kaon production in a chiral quark model

¹ Faculty of Education, University of Ljubljana and J. Stefan Institute, 1000, Ljubljana, Slovenia
² Faculty of Mathematics and Physics, University of Ljubljana and J. Stefan Institute, 1000, Ljubljana, Slovenia

^* e-mail: bojan.golli@ijs.si

Received: 7 April 2016
Accepted: 13 July 2016
Published online: 14 September 2016

Abstract

We apply a coupled-channel formalism incorporating quasi-bound quark-model states to calculate pion scattering into , and channels, as well , , , and photoproduction processes. The meson-baryon and photon-baryon vertices are determined in a SU(3) version of the Cloudy Bag Model. Our model predicts sizable amplitudes in the P₁₁, P₁₃, P₃₃ and S₁₁ partial waves in agreement with the latest MAID isobar model and the recent partial-wave analyses of the Bonn-Gatchina group. We are able to give a quark-model explanation for the apparent resonance near 1685 MeV in the channel.