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Measurement of R between 1.84 and 3.05 GeV at the KEDR detector

2017; Elsevier BV; Volume: 770; Linguagem: Inglês

10.1016/j.physletb.2017.04.073

1873-2445

В.В. Анашин, V.M. Aulchenko, E. M. Baldin, A.K. Barladyan, A. Barnyakov, M.Yu. Barnyakov, S.E. Baru, I.Yu. Basok, A. M. Batrakov, A. E. Blinov, V. E. Blinov, A.V. Bobrov, V. S. Bobrovnikov, A. Bogomyagkov, A. Bondar, А. Р. Бузыкаев, S.I. Eidelman, D.N. Grigoriev, Yu.M. Glukhovchenko, S.E. Karnaev, Г. В. Карпов, С. Карпов, P.V. Kasyanenko, T. Kharlamova, В. А. Киселев, V. V. Kolmogorov, S.A. Kononov, Khristian Kotov, E. A. Kravchenko, V. Kudryavtsev, V. Kulikov, G.Ya. Kurkin, I.A. Kuyanov, E.A. Kuper, E. Levichev, D.A. Maksimov, В. М. Малышев, A. L. Maslennikov, О. И. Мешков, S. I. Mishnev, И. И. Морозов, N. Yu. Muchnoi, V.V. Neufeld, S. A. Nikitin, I. B. Nikolaev, I.N. Okunev, A. P. Onuchin, S.B. Oreshkin, A. A. Osipov, I. Ovtin, S. V. Peleganchuk, S.G. Pivovarov, P. Piminov, Vladimir Petrov, V.G. Prisekin, O. L. Rezanova, A.A. Ruban, V.K. Sandyrev, G.A. Savinov, A.G. Shamov, D. Shatilov, B. Shwartz, E.A. Simonov, S. V. Sinyatkin, A.N. Skrinsky, A. Sokolov, A.M. Sukharev, E.V. Starostina, A.A. Talyshev, V.A. Tayursky, V. I. Telnov, Yu. A. Tikhonov, K. Yu. Todyshev, G.M. Tumaikin, Y. Usov, A.I. Vorobiov, V. Zhilich, V.V. Zhulanov, А. Н. Журавлев,

High-Energy Particle Collisions Research

Using the KEDR detector at the VEPP-4M $e^+e^-$ collider, we have determined the values of $R$ at thirteen points of the center-of-mass energy between 1.84 and 3.05 GeV. The achieved accuracy is about or better than $3.9\%$ at most of the energy points with a systematic uncertainty less than $2.4\%$.