https://doi.org/10.1140/epja/i2011-11061-0
Regular Article - Theoretical Physics
A chiral quark model for meson electroproduction in the S11 partial wave
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:
28
January
2011
Revised:
18
March
2011
Accepted:
13
April
2011
Published online:
19
May
2011
We calculate the meson scattering and electroproduction amplitudes in the S11 partial wave in a coupled-channel approach that incorporates quasi-bound quark-model states. Using the quark wave functions and the quark-meson interaction from the Cloudy Bag Model, we obtain a good overall agreement with the available experimental results for the partial widths of the N(1535) and the N(1650) resonances as well as for the pion, eta and kaon electroproduction amplitudes. Our model is consistent with the N(1535) resonance being dominantly a genuine three-quark state rather than a quasi-bound state of mesons and baryons.
© SIF, Springer-Verlag Berlin Heidelberg, 2011
