Flavor decomposition of the elastic nucleon electromagnetic form factors

Details Flavor decomposition of the elastic nucleon electromagnetic form factors Flavor decomposition of the elastic nucleon electromagnetic form factors

2011-03-09

arxiv.org/abs/1103.1808v1

Phys.Rev.Lett.106:252003,2011

Physics

Nuclear Physics

Nuclear Experiment

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.106.252003

The u- and d-quark contributions to the elastic nucleon electromagnetic form factors have been determined using experimental data on GEn, GMn, GpE, and GpM. Such a flavor separation of the form factors became possible up to 3.4 GeV2 with recent data on GEn from Hall A at JLab. At a negative four-momentum transfer squared Q2 above 1 GeV2, for both the u- and d-quark components, the ratio of the Pauli form factor to the Dirac form factor, F2/F1, was found to be almost constant, and for each of F2 and F1 individually, the d-quark portions of both form factors drop continuously with increasing Q2.

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