Quark model predictions for the SU(6)-breaking ratio of the proton momentum distributions

Details Quark model predictions for the SU(6)-breaking ratio of the proton momentum distributions Quark model predictions for the SU(6)-breaking ratio of the proton momentum distributions

2002-09-10

arxiv.org/abs/nucl-th/0209029v3

Phys.Lett. B552 (2003) 149-158

Physics

Nuclear Physics

Nuclear Theory

12 pages, 3 figures

Scientific paper

10.1016/S0370-2693(02)03158-1

The ratio between the anomalous magnetic moments of proton and neutron has been recently parametrized by the ratio of proton momentum fractions $M_{2}^{q_{val}}$. This ratio is evaluated using different constituent quark models, starting from the CQM density distributions and calculating the next-to leading order distributions. We show that this momentum fractions $M_{2}^{q_{val}}$ ratio is a sensitive test for SU(6)-breaking effects and therefore it is useful to distinguish among different CQMs. We investigate also the possibility of getting constraints on the formulation of quark structure models.

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