The pion form factor from lattice QCD with two dynamical flavours

Details The pion form factor from lattice QCD with two dynamical flavours The pion form factor from lattice QCD with two dynamical flavours

2006-08-28

arxiv.org/abs/hep-lat/0608021v2

Eur.Phys.J.C51:335-345,2007

Physics

High Energy Physics

High Energy Physics - Lattice

19 pages, 10 figures, improved analysis of uncertainties

Scientific paper

10.1140/epjc/s10052-007-0295-6

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 =0.441(20) fm^2, in good agreement with experiment.

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