The pion form factor from lattice QCD with two dynamical flavours
High Energy Physics - Lattice
2008-11-26 v2 High Energy Physics - Phenomenology
Abstract
We compute the electromagnetic form factor of the pion using non-perturbatively O(a) improved Wilson fermions. The calculations are done for a wide range of pion masses and lattice spacings. We check for finite size effects by repeating some of the measurements on smaller lattices. The large number of lattice parameters we use allows us to extrapolate to the physical point. For the square of the charge radius we find <r^2>=0.441(20) fm^2, in good agreement with experiment.
Keywords
Cite
@article{arxiv.hep-lat/0608021,
title = {The pion form factor from lattice QCD with two dynamical flavours},
author = {D. Brömmel and M. Diehl and M. Göckeler and Ph. Hägler and R. Horsley and Y. Nakamura and D. Pleiter and P. E. L. Rakow and A. Schäfer and G. Schierholz and H. Stüben and J. M. Zanotti},
journal= {arXiv preprint arXiv:hep-lat/0608021},
year = {2008}
}
Comments
19 pages, 10 figures, improved analysis of uncertainties