Determination of the Pion Charge Form Factor at Q2=1.60 and 2.45(GeV/c)2

The H1(e,e^'π⁺)n cross section was measured at four-momentum transfers of Q²=1.60 and 2.45GeV² at an invariant mass of the photon nucleon system of W=2.22GeV. The charged pion form factor (F_π) was extracted from the data by comparing the separated longitudinal pion electroproduction cross section to a Regge model prediction in which F_π 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 chromodynamics prediction.