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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

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

classification nucl-th hep-ph
keywords quarkconstituenthelicityhypercentrallongitudinalmodelresonancessystematic
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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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