Electromagnetic nucleon form factors from QCD sum rules
Journal Article
2005
Permanent link to this Item
Authors
Journal Title
Journal of High Energy Physics
Link to Journal
Journal ISSN
Volume Title
Publisher
Publisher
University of Cape Town
Department
Faculty
License
Series
Abstract
The electromagnetic form factors of the nucleon, in the space-like region, are determined from three-point function Finite Energy QCD Sum Rules. The QCD calculation is performed to leading order in perturbation theory in the chiral limit, and to leading order in the non-perturbative power corrections. The results for the Dirac form factor, F1(q2), are in very good agreement with data for both the proton and the neutron, in the currently accessible experimental region of momentum transfers. This is not the case, though, for the Pauli form factor F2(q2), which has a soft q2-dependence proportional to the quark condensate h0|q¯q|0i.
Description
Reference:
Castillo, H., Dominguez, C. A., & Loewe, M. (2005). Electromagnetic nucleon form factors from QCD sum rules. Journal of High Energy Physics, 2005(03), 012.