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

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dc.creatorHe, Jun
dc.creatorSaghai, B.
dc.creatorLi, Zhenping
dc.date2008-02-26
dc.date.accessioned2026-07-07T11:56:19Z
dc.date.available2026-07-07T11:56:19Z
dc.descriptionA formalism based on a chiral quark model ($χ$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 $γp \to ηp$ 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 $χ$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.
dc.description25 pages,3 figures
dc.identifierhttps://arxiv.org/abs/0802.3816
dc.identifierhttp://arxiv.org/abs/0802.3816
dc.identifierPhys.Rev.C78:035204,2008
dc.identifierdoi:10.1103/PhysRevC.78.035204
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/205542
dc.subjectNuclear Theory
dc.titleStudy of $η$ photoproduction on the proton in a chiral constituent quark approach via one-gluon-exchange model
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