Measurement of the branching ratios ψ′→e+e−, ψ′→J/ψπ0π0 and ψ′→J/ψη
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2000
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Abstract
We have determined the following ${\ensuremath{\psi}}^{\ensuremath{'}}$ branching ratios using the large event sample collected by Fermilab experiment E835 in the reaction $p\overline{p}\ensuremath{\rightarrow}{\ensuremath{\psi}}^{\ensuremath{'}}:$ $\mathcal{B}({\ensuremath{\psi}}^{\ensuremath{'}}\ensuremath{\rightarrow}{e}^{+}{e}^{\ensuremath{-}})=(7.4\ifmmode\pm\else\textpm\fi{}0.2\ifmmode\pm\else\textpm\fi{}0.7)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}3},$ $\mathcal{B}({\ensuremath{\psi}}^{\ensuremath{'}}\ensuremath{\rightarrow}J/\ensuremath{\psi}{\ensuremath{\pi}}^{0}{\ensuremath{\pi}}^{0})=(18.7\ifmmode\pm\else\textpm\fi{}0.9\ifmmode\pm\else\textpm\fi{}1.3)%$ and $\mathcal{B}({\ensuremath{\psi}}^{\ensuremath{'}}\ensuremath{\rightarrow}J/\ensuremath{\psi}\ensuremath{\eta})=(4.1\ifmmode\pm\else\textpm\fi{}0.3\ifmmode\pm\else\textpm\fi{}0.5)%.$
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2000physicalmeasurement
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| Journal | physical review d |
| Year | 2000 |
| DOI |
doi:10.1103/PhysRevD.62.032004
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