Precise measurement of Ruds and R between 1.84 and 3.72 GeV at the KEDR detector
В.В. Анашин(Budker Institute of Nuclear Physics), О. В. Анчугов(Budker Institute of Nuclear Physics), V.M. Aulchenko(Novosibirsk State University), E. M. Baldin(Novosibirsk State University), G. N. Baranov(Budker Institute of Nuclear Physics), A.K. Barladyan(Budker Institute of Nuclear Physics), A. Barnyakov(Novosibirsk State University), M.Yu. Barnyakov(Novosibirsk State University), S.E. Baru(Novosibirsk State University), I.Yu. Basok(Budker Institute of Nuclear Physics), A. M. Batrakov(Budker Institute of Nuclear Physics), E. A. Bekhtenev(Budker Institute of Nuclear Physics), A. E. Blinov(Novosibirsk State University), V. E. Blinov(Novosibirsk State University), A. V. Bobrov(Novosibirsk State University), V. S. Bobrovnikov(Novosibirsk State University), A. Bogomyagkov(Novosibirsk State University), A. Bondar(Novosibirsk State University), А. Р. Бузыкаев(Novosibirsk State University), P. B. Cheblakov(Novosibirsk State University), V. L. Dorohov(Novosibirsk State University), S.I. Eidelman(Novosibirsk State University), D. N. Grigoriev(Novosibirsk State University), S. Glukhov(Budker Institute of Nuclear Physics), V. V. Kaminskiy(Budker Institute of Nuclear Physics), S.E. Karnaev(Novosibirsk State University), Г. В. Карпов(Budker Institute of Nuclear Physics), С. Карпов(Budker Institute of Nuclear Physics), K. Yu. Karukina(Budker Institute of Nuclear Physics), D. P. Kashtankin(Budker Institute of Nuclear Physics), P. V. Kasyanenko(Budker Institute of Nuclear Physics), T. Kharlamova(Budker Institute of Nuclear Physics), В. А. Киселев(Budker Institute of Nuclear Physics), V. V. Kolmogorov(Budker Institute of Nuclear Physics), S.A. Kononov(Novosibirsk State University), Khristian Kotov(Budker Institute of Nuclear Physics), А. А. Краснов(Budker Institute of Nuclear Physics), E. A. Kravchenko(Budker Institute of Nuclear Physics), V. Kudryavtsev(Novosibirsk State University), V. Kulikov(Novosibirsk State University), G.Ya. Kurkin(Budker Institute of Nuclear Physics), I. A. Kuyanov(Budker Institute of Nuclear Physics), E. Levichev(Novosibirsk State University), D.A. Maksimov(Novosibirsk State University), В. М. Малышев(Novosibirsk State University), A. L. Maslennikov(Novosibirsk State University), О. И. Мешков(Novosibirsk State University), S. I. Mishnev(Budker Institute of Nuclear Physics), I. Morozov(Budker Institute of Nuclear Physics), И. И. Морозов(Novosibirsk State University), S. A. Nikitin(Budker Institute of Nuclear Physics), I. B. Nikolaev(Novosibirsk State University), I.N. Okunev(Novosibirsk State University), A. P. Onuchin(Novosibirsk State University), S.B. Oreshkin(Novosibirsk State University), A. A. Osipov(Budker Institute of Nuclear Physics), I. Ovtin(Budker Institute of Nuclear Physics), S. V. Peleganchuk(Budker Institute of Nuclear Physics), S.G. Pivovarov(Budker Institute of Nuclear Physics), P. Piminov(Budker Institute of Nuclear Physics), Vladimir Petrov(Budker Institute of Nuclear Physics), V.G. Prisekin(Budker Institute of Nuclear Physics), O. L. Rezanova(Budker Institute of Nuclear Physics), A.A. Ruban(Budker Institute of Nuclear Physics), G.A. Savinov(Budker Institute of Nuclear Physics), A.G. Shamov(Novosibirsk State University), D. Shatilov(Budker Institute of Nuclear Physics), Д. А. Шведов(Novosibirsk State University), B. Shwartz(Budker Institute of Nuclear Physics), E.A. Simonov(Budker Institute of Nuclear Physics), S. Sinyatkin(Budker Institute of Nuclear Physics), A.N. Skrinsky(Budker Institute of Nuclear Physics), A. Sokolov(Novosibirsk State University), D. P. Sukhanov(Budker Institute of Nuclear Physics), A.M. Sukharev(Budker Institute of Nuclear Physics), Е. В. Старостина(Novosibirsk State University), A.A. Talyshev(Budker Institute of Nuclear Physics), V.A. Tayursky(Budker Institute of Nuclear Physics), V. I. Telnov(Budker Institute of Nuclear Physics), Yu. A. Tikhonov(Budker Institute of Nuclear Physics), K. Yu. Todyshev(Budker Institute of Nuclear Physics), A. Tribendis(Novosibirsk State University), G.M. Tumaikin(Budker Institute of Nuclear Physics), Y. Usov(Budker Institute of Nuclear Physics), A.I. Vorobiov(Budker Institute of Nuclear Physics), V. Zhilich(Novosibirsk State University), А. А. Жуков(Budker Institute of Nuclear Physics), V.V. Zhulanov(Budker Institute of Nuclear Physics), А. Н. Журавлев(Budker Institute of Nuclear Physics)
Cited by 31Open Access
Abstract
The present work continues a series of the KEDR measurements of the $R$ value that started in 2010 at the VEPP-4M $e^+e^-$ collider. By combining new data with our previous results in this energy range we measured the values of $R_{\text{uds}}$ and $R$ at nine center-of-mass energies between 3.08 and 3.72 GeV. The total accuracy is about or better than $2.6\%$ at most of energy points with a systematic uncertainty of about $1.9\%$. Together with the previous precise $R$ measurement at KEDR in the energy range 1.84-3.05 GeV, it constitutes the most detailed high-precision $R$ measurement near the charmonium production threshold.
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