Lattice computations of the pion form factor

Abstract
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.
All Related Versions