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Advances in High Energy Physics
Volume 2015, Article ID 803232, 4 pages
Research Article

Scalar Form Factor of the Pion in the Kroll-Lee-Zumino Field Theory

1Centre for Theoretical & Mathematical Physics and Department of Physics, University of Cape Town, Rondebosch 7700, South Africa
2Instituto de Física, Pontificia Universidad Católica de Chile, Casilla 306, 22 Santiago, Chile

Received 28 August 2014; Accepted 4 January 2015

Academic Editor: Alexey A. Petrov

Copyright © 2015 C. A. Dominguez et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The publication of this article was funded by SCOAP3.


The renormalizable Kroll-Lee-Zumino field theory of pions and a neutral rho-meson is used to determine the scalar form factor of the pion in the space-like region at next-to-leading order. Perturbative calculations in this framework are parameter-free, as the masses and the rho-pion-pion coupling are known from experiment. Results compare favorably with lattice QCD calculations.