The pion form factor in improved lattice QCD

van der Heide J, Lutterot M, Koch JH, Laermann E. The pion form factor in improved lattice QCD. PHYSICS LETTERS B. 2003;566(1-2):131-136.We calculate the electromagnetic form factor of the pion in lattice gauge theory. The non-perturbatively improved Sheikoleslarm-Wohlert lattice action is used together with the O(a) improved current. The form factor is compared to results for other choices for the current and features of the structure of the pion deduced from the 'Bethe-Salpeter wave function' are discussed. (C) 2003 Published by Elsevier B.V