The Hypercentral Constituent Quark Model
Abstract
The hypercentral constituent quark model contains a spin independent three-quark interaction inspired by lattice QCD calculations which reproduces the average energy of SU(6) multiplets. The splittings are obtained with a residual generalized SU(6)-breaking interaction including an isospin dependent term. The long standing problem of the Roper is absent and all the 3- and 4-star states are well reproduced. The model has been used in a systematic way for transverse and longitudinal electromagnetic transition form factor of the 3- and 4- star and also for the missing resonances. The prediction of the electromagnetic helicity amplitudes agrees quite well with the data except for low , showing that it can supply a realistic set of quark wave functions. In particular we report the calculated helicity amplitude for the , which is in agreement with the TJNAF data.
Cite
@article{arxiv.nucl-th/0301081,
title = {The Hypercentral Constituent Quark Model},
author = {M. M. Giannini and E. Santopinto and A. Vassallo},
journal= {arXiv preprint arXiv:nucl-th/0301081},
year = {2017}
}
Comments
5 pages, 1 figure, Invited talk at Baryons 2002 Conference,9th International Conference on the structure of baryons (18-20 September 2002),JLab, to be published on World Scientific