Measurement of the e + e − → π+π− cross section with the CMD-2 detector in the 370–520-MeV energy range

Measurement of the e + e − → π+π− cross section with the CMD-2 detector in the 370–520-MeV energy range

The results of the experiment on the measurement of the e+e− → π+π− cross section in a cm energy range of 370–520 MeV are presented. The systematic measurement error is equal to 0.7%. In the vector dominance model, the pion electromagnetic radius is calculated using all the CMD-2 data on the pion fo...

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Veröffentlicht in:JETP letters 2006-12, Vol.84 (8), p.413-417
Hauptverfasser: Aul’chenko, V. M., Akhmetshin, R. R., Banzarov, V. Sh, Barkov, L. M., Bashtovoĭ, N. S., Bondarev, D. V., Bondar’, A. E., Bragin, A. V., Gabyshev, N. I., Gorbachev, D. A., Grebenyuk, A. A., Grigor’ev, D. N., Dhawan, S. K., Epifanov, D. A., Zaĭtsev, A. S., Zverev, S. G., Ignatov, F. V., Kazanin, V. F., Karpov, S. V., Koop, I. A., Krokovny, P. P., Kuz’min, A. S., Logashenko, I. B., Lukin, P. A., Lysenko, A. P., Mil’shteĭn, A. I., Mikhaĭlov, K. Yu, Nesterenko, I. N., Nikulin, M. A., Otboev, A. V., Okhapkin, V. S., Perevedentsev, E. A., Popov, A. S., Redin, S. I., Roberts, B. L., Root, N. I., Ruban, A. A., Ryskulov, N. M., Sibidanov, A. L., Sidorov, V. A., Skrinsky, A. N., Smakhtin, V. P., Snopkov, I. G., Solodov, E. P., Thompson, J. A., Fedotovich, G. V., Khazin, B. I., Hughes, V. W., Shamov, A. G., Shatunov, Yu. M., Shvarts, B. A., Éĭdel’man, S. I., Yudin, Yu. V.
Format: Artikel
Sprache:eng
Schlagworte:
Cross-sections
Error analysis
Form factors
Pions
Vector dominance model
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Zusammenfassung:The results of the experiment on the measurement of the e+e− → π+π− cross section in a cm energy range of 370–520 MeV are presented. The systematic measurement error is equal to 0.7%. In the vector dominance model, the pion electromagnetic radius is calculated using all the CMD-2 data on the pion form factor. The cross section for the production of a muon pair is measured in the energy range of the experiment.
ISSN:0021-3640
1090-6487
DOI:10.1134/S0021364006200021