$η$ production off the proton in a Regge-plus-chiral quark approach

Details $η$ production off the proton in a Regge-plus-chiral quark approach $η$ production off the proton in a Regge-plus-chiral quark approach

2010-05-17

arxiv.org/abs/1005.2797v2

Physics

Nuclear Physics

Nuclear Theory

23 pages.4 figures,4 tables, to appear in Phys.Rev.C

Scientific paper

A chiral constituent quark model approach, embodying s- and u-channel exchanges,complemented with a Reggeized treatment for 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.

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