Electromagnetic nucleon form factors from QCD sum rules
摘要
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, , 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 , which has a soft -dependence proportional to the quark condensate .
引用
@article{arxiv.hep-ph/0302271,
title = {Electromagnetic nucleon form factors from QCD sum rules},
author = {H. Castillo and C. A. Dominguez and M. Loewe},
journal= {arXiv preprint arXiv:hep-ph/0302271},
year = {2009}
}
备注
Replaced Version. An error has been corrected in the numerical evaluation of the Pauli form factor. This changes the results for F_2(q^2), as well as the conclusions