1974/12/02 by J.J. Aubert, U. Becker, Peter J. Biggs +11 · 3 citations
Physics and Astronomy · #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #High-Energy Particle Collisions Research
paper · pdf · doi:10.1103/physrevlett.33.1404
openalex publication_date 1974/12/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/23
We report the observation of a heavy particle J, with mass m=3.1 GeV and width approximately zero. The observation was made from the reaction p+Be\ensuremath→e++e^\ensuremath-+x by measuring the e+e^\ensuremath- mass spectrum with a precise pair spectrometer at the Brookhaven National Laboratory's 30-GeV alternating-gradient synchrotron.