Proton-Antiproton Annihilation and Meson Spectroscopy with the Crystal Barrel

Details Proton-Antiproton Annihilation and Meson Spectroscopy with the Crystal Barrel Proton-Antiproton Annihilation and Meson Spectroscopy with the Crystal Barrel

1997-08-18

arxiv.org/abs/hep-ex/9708025v1

Rev.Mod.Phys.70:1293-1340,1998

Physics

High Energy Physics

High Energy Physics - Experiment

64 pages, LATEX file, 36 figures are available as ps files at http://afuz01.cern.ch/claude/ Submitted to Reviews of Modern Phy

Scientific paper

10.1103/RevModPhys.70.1293

This report reviews the achievements of the Crystal Barrel experiment at the Low Energy Antiproton Ring (LEAR) at CERN. During seven years of operation Crystal Barrel has collected very large statistical samples in pbarp annihilation, especially at rest and with emphasis on final states with high neutral multiplicity. The measured rates for annihilation into various two-body channels and for electromagnetic processes have been used to test simple models for the annihilation mechanism based on the quark internal structure of hadrons. From three-body annihilations three scalar mesons, a0(1450), f0(1370) and f0(1500) have been established in various decay modes. One of them, f0(1500), may be identified with the expected ground state scalar glueball.

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