We report on a program to compute the electromagnetic form factors of mesons. We discuss the techniques used to compute the pion form factor and present results computed with domain-wall valence fermions on MILC asqtad lattices, as well as with Wilson fermions on quenched lattices. We find that the full-QCD form factor is well described by a VMD picture, with the pole mass in the chiral limit mVMD=0.868(65) GeV. However, the quenched Wilson fermion results are suggestive of large scaling violations.
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Bonnet et al. (2005) studied this question.
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