Measurement of the pion form factor in the range 1.04–1.38 GeV with the CMD-2 detector

Abstract

The cross section for the process e + e − → π+π− is measured in the c.m. energy range 1.04—1.38 GeV by analyzing 995 000 selected collinear events including 860000 e + e − events, 82000 μ+μ− events, and 33000 π+π− events. The systematic and statistical errors of measuring the pion form factor are equal to 1.2–4.2 and 5–13%, respectively.