Nucleon form factors from generalized parton distributions

M. Guidal, M. V. Polyakov, A. V. Radyushkin, and M. Vanderhaeghen
Phys. Rev. D 72, 054013 – Published 20 September 2005

Abstract

We discuss the links between generalized parton distributions (GPDs) and elastic nucleon form factors. These links, in the form of sum rules, represent powerful constraints on parametrizations of GPDs. A Regge parametrization for GPDs at small momentum transfer, is extended to the large momentum transfer region and it is found to describe the basic features of proton and neutron electromagnetic form factor data. This parametrization is used to estimate the quark contribution to the nucleon spin.

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  • Received 20 October 2004

DOI:https://doi.org/10.1103/PhysRevD.72.054013

©2005 American Physical Society

Authors & Affiliations

M. Guidal1, M. V. Polyakov2,3, A. V. Radyushkin4,5,6, and M. Vanderhaeghen5,7

  • 1Institut de Physique Nucléaire Orsay, F-91406 Orsay, France
  • 2Petersburg Nuclear Physics Institute, Gatchina, St. Petersburg 188300, Russia
  • 3Université de Liège au Sart Tilman, B-4000 Liège 1 Belgium
  • 4Physics Department, Old Dominion University, Norfolk, Virginia 23529, USA
  • 5Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
  • 6Joint Institute for Nuclear Research, 141980 Dubna, Russia
  • 7Physics Department, College of William and Mary, Williamsburg, Virginia 23187, USA

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Issue

Vol. 72, Iss. 5 — 1 September 2005

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