Measurement of the ratio of the leptonic widths \(\Gamma_{ee}/\Gamma_{\mu\mu}\) for the \(J/\psi\) meson

Measurement of the ratio of the leptonic widths \(\Gamma_{ee}/\Gamma_{\mu\mu}\) for the \(J/\psi\) meson

The ratio of the electron and muon widths of the \(J/\psi\) meson has been measured using direct \(J/\psi\) decays in the KEDR experiment at the VEPP-4M electron-positron collider. The result \(\Gamma_{ee}(J/\psi)/\Gamma_{\mu\mu}(J/\psi)=1.0022\pm0.0044\pm0.0048\ (0.65\%)\) is in good agreement with...

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Veröffentlicht in:arXiv.org 2014-02
Hauptverfasser: KEDR Collaboration, Aulchenko, V M, Baldin, E M, Barladyan, A K, A Yu Barnyakov, M Yu Barnyakov, Baru, S E, I Yu Basok, 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, K Yu Kotov, Kravchenko, E A, Kudryavtsev, V N, Kulikov, V F, G Ya Kurkin, Kuper, E A, Levichev, E B, Maksimov, D A, Malyshev, V M, Maslennikov, A L, Meshkov, O I, Mishnev, S I, Morozov, I I, N Yu Muchnoi, 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, K Yu Todyshev, Tumaikin, G M, Usov, Yu V, Vorobiov, A I, Yushkov, A N, Zhilich, V N, Zhulanov, V V, Zhuravlev, A N
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Sprache:eng
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Zusammenfassung:The ratio of the electron and muon widths of the \(J/\psi\) meson has been measured using direct \(J/\psi\) decays in the KEDR experiment at the VEPP-4M electron-positron collider. The result \(\Gamma_{ee}(J/\psi)/\Gamma_{\mu\mu}(J/\psi)=1.0022\pm0.0044\pm0.0048\ (0.65\%)\) is in good agreement with the lepton universality. The experience collected during this analysis will be used for a \(J/\psi\) lepton width determination with up to 1% accuracy.
ISSN:2331-8422
DOI:10.48550/arxiv.1311.5005