English

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 NcN_c 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 GeV2{GeV}^2.

Keywords

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