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Total cross section for electron-positron annihilation into hadron final states in the upsilon energy region

R. T. Giles, J. Hassard, Martin Hempstead, K. Kinoshita, W. W. MacKay, F. M. Pipkin, Richard J. Wilson, Peter J. Haas, T. Jensen, H. Kagan, R. D. Kass, S. Behrends, Keith A. Chadwick, Jacques Chauveau, P. Ganci, T. Gentile, Jan M. Guida, Joan A. Guida, A. C. Melissinos, S. L. Olsen, G. Parkhurst, D. Peterson, Ronald A. Poling, C. Rosenfeld, G. Rucinski, E. H. Thorndike, P. Tipton, D. Besson, J. Green, R. G. Hicks, R. Namjoshi, F. Sannes, P. Skubic, A. Snyder, R. Stone, A. Chen, M. Goldberg, N. Horwitz, Abolhassan Jawahery, Paolo Lipari, G. C. Moneti, C. G. Trahern, H. Van Hecke, M. S. Alam, S. E. Csorna, L. A. Garren, M. D. Mestayer, R. S. Panvini, Xia Yi, P. Avery, Chris J. Bebek, Karl Berkelman, David G. Cassel, J. W. DeWire, Richard D. Ehrlich, T. Ferguson, R. S. Galik, M. G. D. Gilchriese, B. Gittelman, Mike Halling, D. L. Hartill, D. A. Herrup, S. Holzner, Momoyo Ito, J. Kandaswamy, David L. Kreinick, Y. Kubota, N. B. Mistry, F. M. Morrow, Emery Nordberg, M. Ogg, R. Perchonok, Robert K. Plunkett, Andrea I. Silverman, P. C. Stein, Sheldon L. Stone, Dennis F. Weber, R. Wilcke, A. J. Sadoff

Open publisher page 37 citations

Abstract

We report measurements made with the CLEO detector at the Cornell Electron Storage Ring (CESR) of the total cross section for ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}\mathrm{hadrons}$ at the $\ensuremath{\Upsilon}(1S)$, $\ensuremath{\Upsilon}(2S)$, and $\ensuremath{\Upsilon}(3S)$, and in the nearby nonresonant continuum. We find $R=3.77\ifmmode\pm\else\textpm\fi{}0.06 (\mathrm{statistical}) \ifmmode\pm\else\textpm\fi{} 0.24 (\mathrm{systematic})$ for the ratio of the nonresonant hadronic cross section to the cross section for muon-pair production at a center-of-mass total energy $W=10.4$ GeV. For the leptonic decay widths ${\ensuremath{\Gamma}}_{\mathrm{ee}}$ of the $\ensuremath{\Upsilon}(1S)$, $\ensuremath{\Upsilon}(2S)$, and $\ensuremath{\Upsilon}(3S)$ we obtain 1.30\ifmmode\pm\else\textpm\fi{}0.05\ifmmode\pm\else\textpm\fi{}0.08, 0.52\ifmmode\pm\else\textpm\fi{}0.03\ifmmode\pm\else\textpm\fi{}0.04, and 0.42\ifmmode\pm\else\textpm\fi{}0.04\ifmmode\pm\else\textpm\fi{}0.03 keV, respectively.

About this research paper

What this paper is about

We report measurements made with the CLEO detector at the Cornell Electron Storage Ring (CESR) of the total cross section for ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}\mathrm{hadrons}$ at the $\ensuremath{\Upsilon}(1S)$, $\ensuremath{\Upsilon}(2S)$, and $\ensuremath{\Upsilon}(3S)$, and in the nearby nonresonant continuum. We find $R=3.77\ifmmode\pm\else\textpm\fi{}0.06 (\mathrm{statistical}) \ifmmode\pm\else\textpm\fi{} 0.24 (\mathrm{systematic})$ for the ratio of the nonresonant hadronic cross section to the cross section for muon-pair production at a center-of-mass total energy $W=10.4$ GeV. For the leptonic decay widths ${\ensuremath{\Gamma}}_{\mathrm{ee}}$ of the $\ensuremath{\Upsilon}(1S)$, $\ensuremath{\Upsilon}(2S)$, and $\ensuremath{\Upsilon}(3S)$ we obtain 1.30\ifmmode\pm\else\textpm\fi{}0.05\ifmmode\pm\else\textpm\fi{}0.08, 0.52\ifmmode\pm\else\textpm\fi{}0.03\ifmmode\pm\else\textpm\fi{}0.04, and 0.42\ifmmode\pm\else\textpm\fi{}0.04\ifmmode\pm\else\textpm\fi{}0.03 keV, respectively.

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Available abstract

We report measurements made with the CLEO detector at the Cornell Electron Storage Ring (CESR) of the total cross section for ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}\mathrm{hadrons}$ at the $\ensuremath{\Upsilon}(1S)$, $\ensuremath{\Upsilon}(2S)$, and $\ensuremath{\Upsilon}(3S)$, and in the nearby nonresonant continuum. We find $R=3.77\ifmmode\pm\else\textpm\fi{}0.06 (\mathrm{statistical}) \ifmmode\pm\else\textpm\fi{} 0.24 (\mathrm{systematic})$ for the ratio of the nonresonant hadronic cross section to the cross section for muon-pair production at a center-of-mass total energy $W=10.4$ GeV. For the leptonic decay widths ${\ensuremath{\Gamma}}_{\mathrm{ee}}$ of the $\ensuremath{\Upsilon}(1S)$, $\ensuremath{\Upsilon}(2S)$, and $\ensuremath{\Upsilon}(3S)$ we obtain 1.30\ifmmode\pm\else\textpm\fi{}0.05\ifmmode\pm\else\textpm\fi{}0.08, 0.52\ifmmode\pm\else\textpm\fi{}0.03\ifmmode\pm\else\textpm\fi{}0.04, and 0.42\ifmmode\pm\else\textpm\fi{}0.04\ifmmode\pm\else\textpm\fi{}0.03 keV, respectively.

Key concepts: Physics, Annihilation, Hadron, Muon, Electron–positron annihilation, Nuclear physics, Particle physics, Energy (signal processing)

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Total cross section for electron-positron annihilation into hadron final states in the upsilon energy region — Research Paper | ScholarLens