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

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arxiv 1610.02827 v2 pith:4YDEJAS6 submitted 2016-10-10 hep-ex

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

V.V. Anashin , V.M. Aulchenko , E.M. Baldin , A.K. Barladyan , A.Yu. Barnyakov , M.Yu. Barnyakov , S.E. Baru , I.Yu. Basok
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A.M. Batrakov A.E. Blinov V.E. Blinov A.V. Bobrov V.S. Bobrovnikov A.V. Bogomyagkov A.E. Bondar A.R. Buzykaev S.I. Eidelman D.N. Grigoriev Yu.M. Glukhovchenko S.E. Karnaev G.V. Karpov S.V. Karpov P.V. Kasyanenko T.A. Kharlamova V.A. Kiselev V.V. Kolmogorov S.A. Kononov K.Yu. Kotov E.A. Kravchenko V.N. Kudryavtsev V.F. Kulikov G.Ya. Kurkin I.A. Kuyanov E.B. Levichev D.A. Maksimov V.M. Malyshev A.L. Maslennikov O.I. Meshkov S.I. Mishnev I.I. Morozov 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.V. Ovtin S.V. Peleganchuk S.G. Pivovarov P.A. Piminov V.V. Petrov V.G. Prisekin O.L. Rezanova A.A. Ruban V.K. Sandyrev G.A. Savinov A.G. Shamov D.N. Shatilov B.A. Shwartz E.A. Simonov S.V. Sinyatkin A.N. Skrinsky A.V. 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 Yu.V. Usov A.I. Vorobiov V.N. Zhilich V.V. Zhulanov A.N. Zhuravlev
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keywords detectorenergykedrpointsaccuracyachievedbettercenter-of-mass
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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 $2.4\%$.

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Cited by 4 Pith papers

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  1. Perturbative QCD fitting of KEDR and BESIII $e^+e^-$ data for R(s) and $\alpha_s$ determination

    hep-ph 2026-03 conditional novelty 5.0

    Fits of combined KEDR and truncated BESIII data yield α_s(M_Z)=0.1179 (NLO), 0.1221 (NNLO), 0.1313 (N3LO), with the rise attributed to π² analytic-continuation effects.

  2. Perturbative QCD fitting of KEDR and BESIII $e^+e^-$ data for R(s) and $\alpha_s$ determination

    hep-ph 2026-03 unverdicted novelty 4.0

    Combined fits of KEDR and BESIII R(s) data yield alpha_s(M_Z) = 0.1179, 0.1221, and 0.1312 at NLO, NNLO, and NNNLO, demonstrating strong dependence on perturbative truncation order.

  3. Perturbative QCD fitting of KEDR and BESIII $e^+e^-$ data for R(s) and $\alpha_s$ determination

    hep-ph 2026-03 unverdicted novelty 4.0

    Combined KEDR+BESIII R(s) fits below charm threshold yield α_s(M_Z) that systematically increases from NLO to N³LO, attributed to π² analytic-continuation effects.

  4. The anomalous magnetic moment of the muon in the Standard Model

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