New limit of pion form factor at very large $Q^2$

Abstract

A new limit of pion form factor at very large $Q^2$ is obtained by using a pion wave function determined from an effective chiral field theory of mesons. It shows that when $Q^2>>(1.8GeV{)}^2$ the pion form factor reaches the asymptotic limit $\frac{{\alpha }_s(Q^2)}{Q^2}$.

Comments: 3 pages. To be published in the proceedings of DPF-2009, Detroit, MI, July 2009, eConf C090726