Determination of the Charged Pion Form Factor at Q2=1.60 and 2.45   (GeV/c)2
  The H(e,e'pi+)n cross section was measured at four-momentum transfers of Q2=1.60 and 2.45 GeV2 at an invariant mass of the photon nucleon system of W=2.22 GeV. The charged pion form factor (F_pi) was extracted from the data by comparing the separated longitudinal pion electroproduction cross section to a Regge model prediction in which F_pi is a free parameter. The results indicate that the pion form factor deviates from the charge-radius constrained monopole form at these values of Q2 by one sigma, but is still far from its perturbative Quantum Chromo-Dynamics prediction. 
Fpi2 collaboration: T. Horn, K. Aniol, J. Arrington, B. Barrett, E.J.   Beise, H.P. Blok, W. Boeglin, E.J. Brash, H. Breuer,...