Publications
Publication Information
| Title | Analysis of Nucleon Electromagnetic Form Factors from Light-Front Holographic QCD : The Space-Like Region |
| Authors | R. Sabbir Sufian, Guy de Teramond, Stanley Brodsky, Alexandre Deur, Hans Gunter Dosch |
| JLAB number | JLAB-PHY-16-2363 |
| LANL number | arXiv:1609.06688 |
| Other number | SLAC-PUB-16806; DOE/OR/23177-3962 |
| Document Type(s) | (Journal Article) |
| Associated with EIC: | No |
| Supported by Jefferson Lab LDRD Funding: | No |
| Funding Source: | Nuclear Physics (NP) |
| Other Funding: | AC02-76SF00515 |
|
Journal Compiled for Physical Review D Volume 95 Issue 01 Page(s) 014011 Refereed | |
| Publication Abstract: | We present a comprehensive analysis of the nucleon electromagnetic form factors and their flavor decomposition within the framework of light-front holographic QCD. We show that the inclusion of the higher Fock components $|qqqq\bar{q}>$ has a significant effect on the spin-flip elastic Pauli form factor and almost zero effect on the spin-conserving Dirac form factor. We present light-front holographic QCD predictions of proton and neutron form factors in the momentum transfer range of $0\leq Q^2 \leq 20\, \text{GeV}^2$ and show that these predictions agree with the available experimental data with high accuracy. In order to correctly describe the Pauli form factor we need an admixture of a five quark state of about 30$\%$ in the proton and about 40$\%$ in the neutron. We also extract the nucleon charge and magnetic radii and perform a flavor decomposition of the nucleon electromagnetic form factors. The number of free parameters needed to describe the experimental nucleon form factors in the space-like domain is minimal: two parameters for the probabilities of higher Fock states for the spin-flip form factor and a phenomenological parameter $R$, required to account for the lack of a non-zero constraint of the neutron Dirac form factor at momentum transfer $Q^2 = 0$ as well as possible SU(6) spin-flavor symmetry breaking effects. |
| Experiment Numbers: | |
| Group: | Hall D |
| Document: | |
| DOI: | https://doi.org/10.1103/PhysRevD.95.014011 |
| Accepted Manuscript: | 1609.06688v2.pdf |
| Supporting Documents: | |
| Supporting Datasets: | |