The Proton Electromagnetic Form Factor $F_2$ and Quark Orbital Angular Momentum

Pankaj Jain; John P. Ralston

doi:10.1007/BF02704468

The Proton Electromagnetic Form Factor $F_2$ and Quark Orbital Angular Momentum

High Energy Physics - Phenomenology 2008-11-26 v1 Nuclear Experiment Nuclear Theory

Authors: Pankaj Jain , John P. Ralston

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Abstract

We analyze the proton electromagnetic form factor ratio $R(Q^{2})=QF_2(Q^{2})/F_1(Q^{2})$ as a function of momentum transfer $Q^{2}$ within perturbative QCD. We find that the prediction for $R(Q^{2})$ at large momentum transfer $Q$ depends on the exclusive quark wave functions, which are unknown. For a wide range of wave functions we find that $QF_2/F_1 \sim\ const$ at large momentum transfer, in agreement with recent JLAB data.

Keywords

proton electromagnetic form factor quark orbital angular momentum perturbative QCD exclusive quark wave functions JLAB data

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@article{arxiv.hep-ph/0306194,
  title  = {The Proton Electromagnetic Form Factor $F_2$ and Quark Orbital Angular Momentum},
  author = {Pankaj Jain and John P. Ralston},
  journal= {arXiv preprint arXiv:hep-ph/0306194},
  year   = {2008}
}

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8 pages, 2 figures. To appear in Proceedings of the Workshop QCD 2002, IIT Kanpur, 18-22 November (2002)

The Proton Electromagnetic Form Factor $F_2$ and Quark Orbital Angular Momentum

Abstract

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