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Measurement of the pion form factor in the reaction e/sup +/e/sup -/. --> pi. /sup +/. pi. /sup -/ in the energy range 0. 40--0. 46 GeV

Journal Article · · Sov. J. Nucl. Phys. (Engl. Transl.); (United States)
OSTI ID:5866284
The pion form factor has been measured in the energy range of the colliding electron-positron beams ..sqrt..s from 0.4 to 0.46 GeV. The particle separation was accomplished by means of a new time-of-flight technique on the basis of spark counters with a localized discharge. The form-factor values obtained confirm the validity of the meson vector dominance model predictions in the vicinity of the e/sup +/e/sup -/..--> pi../sup +/..pi../sup -/ reaction threshold. The resulting value of the mean square radius of the pion is = 0.366 +- 0.047 F/sup 2/.
Research Organization:
Nuclear Physics Institute, Siberian Division, USSR Academy of Sciences
OSTI ID:
5866284
Journal Information:
Sov. J. Nucl. Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Nucl. Phys. (Engl. Transl.); (United States) Vol. 33:3; ISSN SJNCA
Country of Publication:
United States
Language:
English