Measurement of the e+e- -> pi+pi- cross section with the CMD-2 detector in the 370-520 MeV c.m. energy range
hep-ex
/ Authors
R. R. Akhmetshin, V. M. Aulchenko, V. Sh. Banzarov, L. M. Barkov, N. S. Bashtovoy, A. E. Bondar, D. V. Bondarev, A. V. Bragin, S. K. Dhawan, S. I. Eidelman
and 43 more authors
D. A. Epifanov, G. V. Fedotovich, N. I. Gabyshev, D. A. Gorbachev, A. A. Grebenuk, D. N. Grigoriev, V. W. Hughes, F. V. Ignatov, S. V. Karpov, V. F. Kazanin, B. I. Khazin, I. A. Koop, P. P. Krokovny, A. S. Kuzmin, I. B. Logashenko, P. A. Lukin, A. P. Lysenko, K. Yu. Mikhailov, A. I. Milshtein, I. N. Nesterenko, M. A. Nikulin, V. S. Okhapkin, A. V. Otboev
/ Abstract
The cross section of the process e+e- -> pi+pi- has been measured at the CMD-2 detector in the 370-520 MeV center-of-mass (c.m.) energy range. A systematic uncertainty of the measurement is 0.7 %. Using all CMD-2 data on the pion form factor, the pion electromagnetic radius was calculated. The cross section of muon pair production was also determined.