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Measurement of e+e- -> phi -> K+K- cross section with the CMD-2 detector at VEPP-2M Collider

CMD-2 Collaboration, R. R. Akhmetshin, V. M. Aulchenko, V. Sh. Banzarov, L. M. Barkov, S. E. Baru, N. S. Bashtovoy, A. E. Bondar, D. V. Bondarev, A. V. Bragin, S. I. Eidelman, D. A. Epifanov, G. V. Fedotovich, N. I. Gabyshev, A. A. Grebeniuk, D. N. Grigoriev, 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, V. S. Okhapkin, E. A. Perevedentsev, A. S. Popov, S. I. Redin, A. A. Ruban, N. M. Ryskulov, Yu. M. Shatunov, B. A. Shwartz, A. L. Sibidanov, I. G. Snopkov, E. P. Solodov, Yu. V. Yudin

Published 2008-04-01Version 1

The process e+ e- -> phi -> K+ K- has been studied with the CMD-2 detector using about 542 000 events detected in the center-of-mass energy range from 1.01 to 1.034 GeV. The systematic error of the cross section is estimated to be 2.2%. The phi(1020) meson parameters in the phi -> K+K- decay channel have been measured: sigma_0(phi-> K+K-) = 2016 +- 8 +- 44 nb, m(phi) = 1019.441 +- 0.008 +- 0.080 MeV/c2, Gamma(phi) = 4.24 +- 0.02 +- 0.03 MeV, B(e+e-)B(K+K-) = (14.27 +- 0.05 +- 0.31)*10(-5).

Comments: 12 pages, 6 figures, 2 tables, uses elsart.cls (second version - some figures are corrected)
Journal: Phys.Lett.B669:217-222,2008
Categories: hep-ex
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