The pion form factor from twisted-mass lattice quantum chromodynamics (1).(Report)

Canadian Journal of Physics | July 1, 2006| | Copyright

Abstract: The pion form factor offers insight into the transition from perturbative to nonperturbative quantum chromodynamics (QCD), and is of current experimental interest. Twisted-mass lattice QCD is a method for eliminating unphysical zero modes from Wilson lattice simulations; it also allows for removal of the leading lattice spacing artifacts through a momentum-averaging prescription. In our study of the pion form factor, we performed the first explicit computation with momentum averaging in twisted-mass lattice QCD, and the first use of the GMRES-DR algorithm for ...

<[pi]([p.sub.f])|[V.sub.[mu]](0)|[pi]([p.sub.i])>

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