Electromagnetic proton form factors in large $N_c$ QCD

Abstract

The electromagnetic form factors of the proton are obtained using a particular realization of QCD in the large $N_c$ limit (${QCD}_{\infty }$), which sums up the infinite number of zero-width resonances to yield an Euler's Beta function (Dual-${QCD}_{\infty }$). The form factors $F_1(q^2)$ and $F_2(q^2)$, as well as $G_M(q^2)$ agree very well with reanalyzed space-like data in the whole range of momentum transfer. In addition, the predicted ratio ${\mu }_p{G}_E/G_M$ is in good agreement with recent polarization transfer measurements at Jefferson Lab.

Comments: 10 pages