We have measured several branching ratios for psi(') decay using the data collected by the FNAL E835 experiment during the year 2000, obtaining B(psi(')-->e(+)e(-))=0.0068+/-0.0001+/-0.0004, B(psi(')-->J/psipi(+)pi(-))=0.292+/-0.005+/-0.018, B(psi(')-->J/psipi(0)pi(0))=0.167+/-0.005+/-0.014, and B(psi(')-->J/psieta)=0.028+/-0.002+/-0.002. We also present a measurement of the dipion mass distribution in the decays psi(')-->J/psipipi.
Measurement of the branching ratios psi(')-> e(+)e(-), psi '-> J/psi pi pi, and psi '-> J/psi eta
MENICHETTI, Ezio;OBERTINO, Maria Margherita;
2005-01-01
Abstract
We have measured several branching ratios for psi(') decay using the data collected by the FNAL E835 experiment during the year 2000, obtaining B(psi(')-->e(+)e(-))=0.0068+/-0.0001+/-0.0004, B(psi(')-->J/psipi(+)pi(-))=0.292+/-0.005+/-0.018, B(psi(')-->J/psipi(0)pi(0))=0.167+/-0.005+/-0.014, and B(psi(')-->J/psieta)=0.028+/-0.002+/-0.002. We also present a measurement of the dipion mass distribution in the decays psi(')-->J/psipipi.
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