Extracting the electromagnetic pion form factor from QCD in a finite volume
Extracting the electromagnetic pion form factor from QCD in a finite volume
We consider finite volume effects on the electromagnetic form factor of the pion. We compute the peudoscalar-vector-pseudoscalar correlator in the $\epsilon$ expansion of chiral perturbation theory up to the next-to-leading order and find a way to remove the dominant part, which comes from a contribution of the pion zero-mode. Inserting …