Abstract
The product of the electronic width of the J/ψ meson and the branching fractions of its decay to hadrons and electrons has been measured using the KEDR detector at the VEPP-4M e+e− collider. The obtained values are
The uncertainties shown are statistical and systematic, respectively. Using the result presented and the world-average value of the electronic branching fraction, one obtains the total width of the J/ψ meson:
These results are consistent with the previous experiments.
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Anashin, V.V., Aulchenko, V.M., Baldin, E.M. et al. Measurement of Γee(J/ψ) with KEDR detector. J. High Energ. Phys. 2018, 119 (2018). https://doi.org/10.1007/JHEP05(2018)119
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DOI: https://doi.org/10.1007/JHEP05(2018)119