Pion form factor in large $N_c$ QCD
High Energy Physics - Phenomenology
2009-11-07 v1 Nuclear Theory
Abstract
The electromagnetic form factor of the pion is obtained using a particular realization of QCD in the large limit, which sums up the infinite number of zero-width resonances to yield an Euler's Beta function of the Veneziano type. This form factor agrees with space-like data much better than single rho-meson dominance. A simple unitarization ansatz is illustrated, and the resulting vector spectral function in the time-like region is shown to be in reasonable agreement with the ALEPH data from threshold up to about 1.3 .
Cite
@article{arxiv.hep-ph/0102190,
title = {Pion form factor in large $N_c$ QCD},
author = {C. A. Dominguez},
journal= {arXiv preprint arXiv:hep-ph/0102190},
year = {2009}
}
Comments
Plain Latex, 9 pages, 2 figures