Measurement of the branching ratios psi^prime to e^+ e^-, psi^prime to J/psi π π and psi^prime to J/psi η

M. Andreotti , S. Bagnasco , W. Baldini , D. Bettoni , G. Borreani , A. Buzzo , R. Calabrese , R. Cester

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G. Cibinetto P. Dalpiaz G. Garzoglio K. E. Gollwitzer M. Graham M. Hu D. Joffe J. Kasper G. Lasio M. Lo Vetere E. Luppi M. Macri M. Mandelkern F. Marchetto M. Marinelli E. Menichetti Z. Metreveli R. Mussa M. Negrini M. M. Obertino M. Pallavicini N. Pastrone C. Patrignani T. K. Pedlar S. Pordes E. Robutti W. Roethel J. L. Rosen P. Rumerio R. Rusack A. Santroni J. Schultz S. H. Seo K. K. Seth G. Stancari M. Stancari A. Tomaradze I. Uman T. Vidnovic III S. Werkema P. Zweber

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classification ✦ hep-ex

keywords primebranchingmeasurementratioscollecteddatadecaydecays

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We have measured several branching ratios for $\psi^\prime$ decay using the data collected by FNAL E835 experiment during year 2000, obtaining ${\cal B}(\psi^\prime \to e^+ e^-) = 0.0068\pm0.0001\pm0.0004$, ${\cal B}(\psi^\prime \to J/\psi \pi^+ \pi^-) = 0.292\pm0.005\pm0.018$, ${\cal B}(\psi^\prime \to J/\psi \pi^0 \pi^0) = 0.167\pm0.005\pm0.014$ and ${\cal B}(\psi^\prime \to J/\psi \eta) = 0.028\pm0.002\pm0.002$. We also present a measurement of the dipion mass distribution in the decays $\psi^\prime \to J/\psi \pi \pi$.

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Measurement of the branching ratios psi^prime to e^+ e^-, psi^prime to J/psi π π and psi^prime to J/psi η

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