Résumé du preprint Irfu-10-72

Irfu-10-72
$\eta$ production off the proton in a Regge-plus-chiral quark approach
J. He, B. Saghai
A chiral constituent quark model approach, embodying {\\it s}- and {\\it u}-channel exchanges, complemented with a Reggeized treatment for {\\it t}-channel is presented. A model is obtained allowing data for $\\pi^- p \\to \\eta n$ and $\\gamma p \\to \\eta p$ to be describe satisfactorily. For the latter reaction, recently released data by CLAS and CBELSA/TAPS Collaborations in the system total energy range $1.6 \\lesssim W \\lesssim 2.8$ GeV are well reproduced due to the inclusion of Reggeized trajectories instead of simple $\\rho$ and $\\omega$ poles. Contribution from ``missing\'\' resonances is found to be negligible in the considered processes.