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Title: Measurement of the product of the leptonic width of the J/ψ meson and the branching ratio for its decay to hadrons

A preliminary result of the KEDR/VEPP-4M experiment devoted to measuring the cross section for electron-positron annihilation to hadrons (e{sup +}e{sup −} → hadrons) in the energy region of J/ψ-resonance production is presented. The value found for the product of the J/ψ-meson width with respect to decay to electrons and the branching ratio for J/ψ-meson decay to hadrons is Γ{sub ee}B{sub h} = 4.67±0.04(stat.)± 0.22(syst.) keV.
Authors:
 [1] ;
  1. Russian Academy of Sciences, Budker Institute of Nuclear Physics, Siberian Branch (Russian Federation)
Publication Date:
OSTI Identifier:
22472297
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Atomic Nuclei; Journal Volume: 78; Journal Issue: 3; Other Information: Copyright (c) 2015 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CROSS SECTIONS; ELECTRON-POSITRON INTERACTIONS; ELECTRONS; J PSI-3097 MESONS; KEV RANGE; PARTICLE DECAY; POSITRONS; RESONANCE; VEPP-4