Study of $\eta$ photoproduction on the proton in a chiral constituent quark approach via one-gluon-exchange model

Abstract

A formalism based on a chiral quark model ($\chi$QM) approach complemented with a one-gluon exchange model, to take into account the breakdown of the $SU(6)\otimes O(3)$ symmetry, is presented. The configuration mixing of wave functions for nucleon and resonances are derived. % With few adjustable parameters, differential cross-section and polarized beam asymmetry for the $\gamma p\to \eta p$ process are calculated and successfully compared with the data in the centre-of-mass energy range from threshold up to 2 GeV. The known resonances $S_{11}(1535)$, $S_{11}(1650)$, $P_{13}(1720)$, $D_{13}(1520)$, and $F_{15}(1680)$, as well as two new $S_{11}$ and $D_{15}$ resonances are found to be dominant in the reaction mechanism. Besides, connections among the scattering amplitudes of the $\chi$QM approach and the helicity amplitudes, as well as decay widths of resonances are established. Possible contributions from the so-called "missing resonances" are investigated and found to be negligible.

25 pages,3 figures

References in corpus (6)

• Measurement of eta photoproduction on the proton from threshold to 1500 MeV
• Measurement of the beam asymmetry in eta-photoproduction off the proton
• Coupled-channels study of the ${\pi }^{-}p\to \eta n$ process
• The physical meaning of scattering matrix singularities in coupled-channel formalisms
• Strangeness in the proton and N*(1535)
• Chiral constituent quark model study of the process $\gamma p\to \eta p$

Cited by in corpus (8)

• Charmonium spectrum and their electromagnetic transitions with higher multipole contributions
• Strong and radiative decays of the doubly charmed baryons
• Photoproduction of $\eta$ mesons off neutrons from a deuteron target
• $\Omega$ baryon spectrum and their decays in a constituent quark model
• Photoproduction of eta meson within a coupled-channels K-matrix approach
• Possible molecular states from the $N\Delta$ interaction
• Configuration Mixing of Quark States in Baryons
• Understanding the 1P- and 2S-wave nucleon resonances within the extended Lee-Friedrichs Model