Measurement of the Charged Pion Electromagnetic Form Factor

Abstract

Separated longitudinal and transverse structure functions for the reaction 1H(e,eprime pi+)n were measured in the momentum transfer region Q2=0.6-1.6 (GeV/c)**2 at a value of the invariant mass W=1.95 GeV. New values for the pion charge form factor were extracted from the longitudinal cross section by using a recently developed Regge model. The results indicate that the pion form factor in this region is larger than previously assumed and is consistent with a monopole parameterization fitted to very low Q2 elastic data.

5 pages, 3 figures

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• Pion Form Factor in QCD at Intermediate Momentum Transfers
• Pseudovector components of the pion, pi^0 -> gamma gamma, and F_pi(q^2)
• Pion form factors with improved infrared factorization

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