2005/02/15 by M. Andreotti, S. Bagnasco, W. Baldini +53 · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.1103/physrevd.71.032006
published as Phys.Rev.D71:032006,2005
arxiv created 2005/02/15 · openalex publication_date 2005/02/24 · arxiv updated 2009/12/01 · openalex created_date 2017/06/05 · openalex updated_date 2026/07/28
We have measured several branching ratios for \ensuremathψ^\ensuremath' decay using the data collected by the FNAL E835 experiment during the year 2000, obtaining B(\ensuremathψ^\ensuremath'\ensuremath→e+e^\ensuremath-)=0.0068\ifmmode±\else\textpm\fi0.0001\ifmmode±\else\textpm\fi0.0004, B(\ensuremathψ^\ensuremath'\ensuremath→J/\ensuremathψ\ensuremathπ+\ensuremathπ^\ensuremath-)=0.292\ifmmode±\else\textpm\fi0.005\ifmmode±\else\textpm\fi0.018, B(\ensuremathψ^\ensuremath'\ensuremath→J/\ensuremathψ\ensuremathπ0\ensuremathπ0)=0.167\ifmmode±\else\textpm\fi0.005\ifmmode±\else\textpm\fi0.014, and B(\ensuremathψ^\ensuremath'\ensuremath→J/\ensuremathψ\ensuremathη)=0.028\ifmmode±\else\textpm\fi0.002\ifmmode±\else\textpm\fi0.002. We also present a measurement of the dipion mass distribution in the decays \ensuremathψ^\ensuremath'\ensuremath→J/\ensuremathψ\ensuremathπ\ensuremathπ.