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Measurement of Γee(J) with KEDR detector

  • V. V Anashin
  • V. M Aulchenko
  • E. M Baldin
  • A. K Barladyan
  • A. Y Barnyakov
  • M. Y Barnyakov
  • S. E Baru
  • I. V Bedny
  • A. E Blinov
  • V. E Blinov
  • A. V Bobrov
  • V. S Bobrovnikov
  • A. V Bogomyagkov
  • A. E Bondar
  • D. V Bondarev
  • A. R Buzykaev
  • S. I Eidelman
  • Y. M Glukhovchenko
  • V. V Gulevich
  • D. V Gusev
  • S. E Karnaev
  • G. V Karpov
  • S. V Karpov
  • T. A KharlamovaEmail author
  • V. A Kiselev
  • S. A Kononov
  • K. Y Kotov
  • E. A Kravchenko
  • V. F Kulikov
  • G. Y Kurkin
  • E. A Kuper
  • E. B Levichev
  • D. A Maksimov
  • V. M Malyshev
  • A. L Maslennikov
  • A. S Medvedko
  • O. I Meshkov
  • S. I Mishnev
  • I. I Morozov
  • N. Y Muchnoi
  • V. V Neufeld
  • S. A Nikitin
  • I. B Nikolaev
  • I. N Okunev
  • A. P Onuchin
  • S. B Oreshkin
  • I. O Orlov
  • A. A Osipov
  • S. V Peleganchuk
  • S. G Pivovarov
  • P. A Piminov
  • V. V Petrov
  • A. O Poluektov
  • I. N Popkov
  • V. G Prisekin
  • O. L Rezanova
  • A. A Ruban
  • V. K Sandyrev
  • G. A Savinov
  • A. G Shamov
  • D. N Shatilov
  • B. A Shwartz
  • E. A Simonov
  • S. V Sinyatkin
  • Y. I Skovpen
  • A. N Skrinsky
  • V. V Smaluk
  • A. V Sokolov
  • A. M Sukharev
  • E. V Starostina
  • A. A Talyshev
  • V. A Tayursky
  • V. I Telnov
  • Y. A Tikhonov
  • K. Y Todyshev
  • G. M Tumaikin
  • Y. V Usov
  • A. I Vorobiov
  • A. N Yushkov
  • V. N Zhilich
  • V. V Zhulanov
  • A. N Zhuravlev
Open Access
Regular Article - Experimental Physics

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
$$ \begin{array}{c}\hfill {\Gamma}_{ee}\left(J/\psi \right)=5.550\pm 0.056\pm 0.089\kern0.5em \mathrm{keV},\hfill \\ {}\hfill {\Gamma}_{ee}\left(J/\psi \right)\cdotp {\mathrm{\mathcal{B}}}_{\mathrm{hadrons}}\left(J/\psi \right)=4.884\pm 0.048\pm 0.078\kern0.5em \mathrm{keV},\hfill \\ {}\hfill {\Gamma}_{ee}\left(J/\psi \right)\cdotp {\mathrm{\mathcal{B}}}_{ee}\left(J/\psi \right)=0.3331\pm 0.0066\pm 0.0040\kern0.5em \mathrm{keV}.\hfill \end{array} $$
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:
$$ \Gamma =92.94\pm 1.83\kern0.5em \mathrm{keV}. $$

These results are consistent with the previous experiments.

Keywords

e+-e- Experiments 

Notes

Open Access

This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

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Copyright information

© The Author(s) 2018

Authors and Affiliations

  • V. V Anashin
    • 1
  • V. M Aulchenko
    • 1
    • 2
  • E. M Baldin
    • 1
    • 2
  • A. K Barladyan
    • 1
  • A. Y Barnyakov
    • 1
    • 2
  • M. Y Barnyakov
    • 1
    • 2
  • S. E Baru
    • 1
    • 2
  • I. V Bedny
    • 1
  • A. E Blinov
    • 1
    • 2
  • V. E Blinov
    • 1
    • 2
    • 3
  • A. V Bobrov
    • 1
    • 2
  • V. S Bobrovnikov
    • 1
    • 2
  • A. V Bogomyagkov
    • 1
    • 2
  • A. E Bondar
    • 1
    • 2
  • D. V Bondarev
    • 1
  • A. R Buzykaev
    • 1
    • 2
  • S. I Eidelman
    • 1
    • 2
  • Y. M Glukhovchenko
    • 1
  • V. V Gulevich
    • 1
  • D. V Gusev
    • 1
  • S. E Karnaev
    • 1
  • G. V Karpov
    • 1
  • S. V Karpov
    • 1
  • T. A Kharlamova
    • 1
    • 2
    Email author
  • V. A Kiselev
    • 1
  • S. A Kononov
    • 1
    • 2
  • K. Y Kotov
    • 1
  • E. A Kravchenko
    • 1
    • 2
  • V. F Kulikov
    • 1
    • 2
  • G. Y Kurkin
    • 1
    • 3
  • E. A Kuper
    • 1
    • 2
  • E. B Levichev
    • 1
    • 3
  • D. A Maksimov
    • 1
    • 2
  • V. M Malyshev
    • 1
  • A. L Maslennikov
    • 1
    • 2
  • A. S Medvedko
    • 1
  • O. I Meshkov
    • 1
    • 2
  • S. I Mishnev
    • 1
  • I. I Morozov
    • 1
    • 2
  • N. Y Muchnoi
    • 1
    • 2
  • V. V Neufeld
    • 1
  • S. A Nikitin
    • 1
  • I. B Nikolaev
    • 1
    • 2
  • I. N Okunev
    • 1
  • A. P Onuchin
    • 1
    • 2
    • 3
  • S. B Oreshkin
    • 1
  • I. O Orlov
    • 1
  • A. A Osipov
    • 1
    • 2
  • S. V Peleganchuk
    • 1
    • 2
  • S. G Pivovarov
    • 1
    • 3
  • P. A Piminov
    • 1
  • V. V Petrov
    • 1
  • A. O Poluektov
    • 1
  • I. N Popkov
    • 1
  • V. G Prisekin
    • 1
    • 2
  • O. L Rezanova
    • 1
    • 2
  • A. A Ruban
    • 1
    • 2
  • V. K Sandyrev
    • 1
  • G. A Savinov
    • 1
  • A. G Shamov
    • 1
    • 2
  • D. N Shatilov
    • 1
  • B. A Shwartz
    • 1
    • 2
  • E. A Simonov
    • 1
  • S. V Sinyatkin
    • 1
  • Y. I Skovpen
    • 1
  • A. N Skrinsky
    • 1
  • V. V Smaluk
    • 1
  • A. V Sokolov
    • 1
    • 2
  • A. M Sukharev
    • 1
    • 2
  • E. V Starostina
    • 1
    • 2
  • A. A Talyshev
    • 1
    • 2
  • V. A Tayursky
    • 1
    • 2
  • V. I Telnov
    • 1
    • 2
  • Y. A Tikhonov
    • 1
    • 2
  • K. Y Todyshev
    • 1
    • 2
  • G. M Tumaikin
    • 1
  • Y. V Usov
    • 1
  • A. I Vorobiov
    • 1
  • A. N Yushkov
    • 1
  • V. N Zhilich
    • 1
    • 2
  • V. V Zhulanov
    • 1
    • 2
  • A. N Zhuravlev
    • 1
    • 2
  1. 1.Budker Institute of Nuclear PhysicsNovosibirskRussia
  2. 2.Novosibirsk State UniversityNovosibirskRussia
  3. 3.Novosibirsk State Technical UniversityNovosibirskRussia

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