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Measurement of the ratio of the leptonic widths $��_{ee}/��_{����}$ for the $J/��$ meson

Authors :
KEDR Collaboration
Aulchenko, V. M.
Baldin, E. M.
Barladyan, A. K.
Barnyakov, A. Yu.
Barnyakov, M. Yu.
Baru, S. E.
Basok, I. Yu.
Batrakov, A. M.
Blinov, A. E.
Blinov, V. E.
Bobrov, A. V.
Bobrovnikov, V. S.
Bogomyagkov, A. V.
Bondar, A. E.
Buzykaev, A. R.
Eidelman, S. I.
Grigoriev, D. N.
Groshev, V. R.
Glukhovchenko, Yu. M.
Gulevich, V. V.
Gusev, D. V.
Karnaev, S. E.
Karpov, G. V.
Karpov, S. V.
Kharlamova, T. A.
Kiselev, V. A.
Kolmogorov, V. V.
Kononov, S. A.
Kotov, K. Yu.
Kravchenko, E. A.
Kudryavtsev, V. N.
Kulikov, V. F.
Kurkin, G. Ya.
Kuper, E. A.
Levichev, E. B.
Maksimov, D. A.
Malyshev, V. M.
Maslennikov, A. L.
Meshkov, O. I.
Mishnev, S. I.
Morozov, I. I.
Muchnoi, N. Yu.
Neufeld, V. V.
Nikitin, S. A.
Nikolaev, I. B.
Okunev, I. N.
Onuchin, A. P.
Oreshkin, S. B.
Orlov, I. O.
Osipov, A. A.
Peleganchuk, S. V.
Pivovarov, S. G.
Piminov, P. A.
Petrov, V. V.
Poluektov, A. O.
Prisekin, V. G.
Rezanova, O. L.
Ruban, A. A.
Sandyrev, V. K.
Savinov, G. A.
Shamov, A. G.
Shatilov, D. N.
Shwartz, B. A.
Simonov, E. A.
Sinyatkin, S. V.
Skrinsky, A. N.
Sokolov, A. V.
Sukharev, A. M.
Starostina, E. V.
Talyshev, A. A.
Tayursky, V. A.
Telnov, V. I.
Tikhonov, Yu. A.
Todyshev, K. Yu.
Tumaikin, G. M.
Usov, Yu. V.
Vorobiov, A. I.
Yushkov, A. N.
Zhilich, V. N.
Zhulanov, V. V.
Zhuravlev, A. N.
Publication Year :
2013
Publisher :
arXiv, 2013.

Abstract

The ratio of the electron and muon widths of the $J/��$ meson has been measured using direct $J/��$ decays in the KEDR experiment at the VEPP-4M electron-positron collider. The result $��_{ee}(J/��)/��_{����}(J/��)=1.0022\pm0.0044\pm0.0048\ (0.65\%)$ is in good agreement with the lepton universality. The experience collected during this analysis will be used for a $J/��$ lepton width determination with up to 1% accuracy.<br />5 pages, 6 figures, 2 tables

Subjects

Subjects :
High Energy Physics - Experiment (hep-ex)
High Energy Physics::Phenomenology
Physics::Accelerator Physics
FOS: Physical sciences
High Energy Physics::Experiment

Details

Database :
OpenAIRE
Accession number :
edsair.doi...........6159368a47ffe503ba7f12ac19f2dc1d
Full Text :
https://doi.org/10.48550/arxiv.1311.5005
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