English

Measurement of $\Gamma_{ee}(J/\psi)$ with KEDR detector

High Energy Physics - Experiment 2018-06-13 v1

Abstract

The product of the electronic width of the J/ψJ/\psi meson and the branching fractions of its decay to hadrons and electrons has been measured using the KEDR detector at the VEPP-4M e+ee^+e^- collider. The obtained values are: Γee(J/ψ)=5.550±0.056±0.089keV,\Gamma_{ee}(J/\psi) = 5.550 \pm 0.056 \pm 0.089 \, \text{keV}, Γee(J/ψ)Bhadrons(J/ψ)=4.884±0.048±0.078keV,\Gamma_{ee}(J/\psi) \cdot \mathcal{B}_\text{hadrons}(J/\psi) = 4.884 \pm 0.048 \pm 0.078 \, \text{keV}, Γee(J/ψ)Bee(J/ψ)=0.3331±0.0066±0.0040keV.\Gamma_{ee}(J/\psi) \cdot \mathcal{B}_{ee}(J/\psi) = 0.3331 \pm 0.0066 \pm 0.0040 \, \text{keV}. 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/ψJ/\psi meson: Γ=92.94±1.83keV.\Gamma = 92.94 \pm 1.83 \, \text{keV}. These results are consistent with the previous experiments.

Keywords

Cite

@article{arxiv.1801.01958,
  title  = {Measurement of $\Gamma_{ee}(J/\psi)$ with KEDR detector},
  author = {V. V. Anashin and V. M. Aulchenko and E. M. Baldin and A. K. Barladyan and A. Yu. Barnyakov and M. Yu. Barnyakov and S. E. Baru and I. V. Bedny and A. E. Blinov and V. E. Blinov and A. V. Bobrov and V. S. Bobrovnikov and A. V. Bogomyagkov and A. E. Bondar and D. V. Bondarev and A. R. Buzykaev and S. I. Eidelman and Yu. M. Glukhovchenko and V. V. Gulevich and D. V. Gusev and S. E. Karnaev and G. V. Karpov and S. V. Karpov and T. A. Kharlamova and V. A. Kiselev and S. A. Kononov and K. Yu. Kotov and E. A. Kravchenko and V. F. Kulikov and G. Ya. Kurkin and E. A. Kuper and E. B. Levichev and D. A. Maksimov and V. M. Malyshev and A. L. Maslennikov and A. S. Medvedko and O. I. Meshkov and S. I. Mishnev and I. I. Morozov and N. Yu. Muchnoi and V. V. Neufeld and S. A. Nikitin and I. B. Nikolaev and I. N. Okunev and A. P. Onuchin and S. B. Oreshkin and I. O. Orlov and A. A. Osipov and S. V. Peleganchuk and S. G. Pivovarov and P. A. Piminov and V. V. Petrov and A. O. Poluektov and I. N. Popkov and V. G. Prisekin and O. L. Rezanova and A. A. Ruban and V. K. Sandyrev and G. A. Savinov and A. G. Shamov and D. N. Shatilov and B. A. Shwartz and E. A. Simonov and S. V. Sinyatkin and Yu. I. Skovpen and A. N. Skrinsky and V. V. Smaluk and A. V. Sokolov and A. M. Sukharev and E. V. Starostina and A. A. Talyshev and V. A. Tayursky and V. I. Telnov and Yu. A. Tikhonov and K. Yu. Todyshev and G. M. Tumaikin and Yu. V. Usov and A. I. Vorobiov and A. N. Yushkov and V. N. Zhilich and V. V. Zhulanov and A. N. Zhuravlev},
  journal= {arXiv preprint arXiv:1801.01958},
  year   = {2018}
}

Comments

19 pages, 13 figures