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

V. M. Aul’chenko,R. R. Akhmetshin,V. Sh. Banzarov,L. M. Barkov,N. S. Bashtovoĭ,D. V. Bondarev,A. E. Bondar’,A. V. Bragin,N. I. Gabyshev,D. A. Gorbachev,A. A. Grebenyuk,D. N. Grigor’ev,S. K. Dhawan,D. A. Epifanov,A. S. Zaĭtsev,S. G. Zverev,F. V. Ignatov,V. F. Kazanin,S. V. Karpov,I. A. Koop,P. P. Krokovny,A. S. Kuz’min,I. B. Logashenko,P. A. Lukin,A. P. Lysenko,A. I. Mil’shteĭn,K. Yu. Mikhaĭlov,I. N. Nesterenko,M. A. Nikulin,A. V. Otboev,V. S. Okhapkin,E. A. Perevedentsev,A. S. Popov,S. I. Redin,B. L. Roberts,N. I. Root,A. A. Ruban,N. M. Ryskulov,A. L. Sibidanov,V. A. Sidorov,A. N. Skrinsky,V. P. Smakhtin,I. G. Snopkov,E. P. Solodov,J. A. Thompson,G. V. Fedotovich,B. I. Khazin,V. W. Hughes,A. G. Shamov,Yu. M. Shatunov,B. A. Shvarts,S. I. Éĭdel’man,Yu. V. Yudin

JETP Letters（2006）

Cited 141|Views117
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Abstract
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.
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13.25.-k,13.40.Gp,13.66.-a,29.30.-h
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