Asymptotic behavior of pion form factors
  We consider the electromagnetic and transition pion form factors. Using dispersion relations we simultaneously describe both the hadronic, time-like region and the asymptotic region of large energy-momentum transfer. For the latter we propose a novel mechanism of Regge fermion exchange. 
Mikhail Gorchtein, Peng Guo and Adam P. Szczepaniak
hep-ph hep-ex nucl-ex nucl-th