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A systematic study of longitudinal and transverse helicity amplidutes in the hypercentral Constituent Quark Model

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arxiv 1506.01207 v1 pith:VPLBL4KC submitted 2015-06-03 nucl-th hep-ph

E. Santopinto , M.M. Giannini This is my paper · ORCID
classification nucl-thhep-ph
keywords quarkconstituenthelicityhypercentrallongitudinalmodelresonancessystematic
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abstract

We report in a systematic way the predictions of the non-relativistic hypercentral Constituent Quark model for the electromagnetic excitations of baryon resonances. The longitudinal and transverse helicity amplitudes are calculated with no free parameters for fourteen resonances, both for proton and neutron. The calculations lead to an overall fair description of data, specially in the medium $Q^2$ range, where quark degrees of freedom are expected to dominate.

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Cited by 1 Pith paper

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  1. Low-$Q^2$ empirical parametrizations of the $N^\ast$ helicity amplitudes

    hep-ph 2019-08 conditional novelty 5.0 of 10

    Empirical helicity amplitude fits for nine nucleon and Delta resonances are modified near the pseudothreshold using a polynomial in the photon momentum matched at QP^2 = 0.1, 0.3, and 0.5 GeV^2.

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