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1. Precise measurement of Ruds and R between 1.84 and 3.72 GeV at the KEDR detector

Author

V.V. Anashin, O.V. Anchugov, V.M. Aulchenko, E.M. Baldin, G.N. Baranov, A.K. Barladyan, A.Yu. Barnyakov, M.Yu. Barnyakov, S.E. Baru, I.Yu. Basok, A.M. Batrakov, E.A. Bekhtenev, A.E. Blinov, V.E. Blinov, A.V. Bobrov, V.S. Bobrovnikov, A.V. Bogomyagkov, A.E. Bondar, A.R. Buzykaev, P.B. Cheblakov, V.L. Dorohov, S.I. Eidelman, D.N. Grigoriev, S.A. Glukhov, V.V. Kaminskiy, S.E. Karnaev, G.V. Karpov, S.V. Karpov, K.Yu. Karukina, D.P. Kashtankin, P.V. Kasyanenko, T.A. Kharlamova, V.A. Kiselev, V.V. Kolmogorov, S.A. Kononov, K.Yu. Kotov, A.A. Krasnov, 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.A. Morozov, I.I. Morozov, 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, G.A. Savinov, A.G. Shamov, D.N. Shatilov, D.A. Shvedov, B.A. Shwartz, E.A. Simonov, S.V. Sinyatkin, A.N. Skrinsky, A.V. Sokolov, D.P. Sukhanov, A.M. Sukharev, E.V. Starostina, A.A. Talyshev, V.A. Tayursky, V.I. Telnov, Yu.A. Tikhonov, K.Yu. Todyshev, A.G. Tribendis, G.M. Tumaikin, Yu.V. Usov, A.I. Vorobiov, V.N. Zhilich, A.A. Zhukov, V.V. Zhulanov, and A.N. Zhuravlev

Subjects
Physics, QC1-999
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 Ruds 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.

Published
2019
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2. Measurement of Γee×Bμμ for ψ(2S) meson

Author

V.V. Anashin, O.V. Anchugov, V.M. Aulchenko, E.M. Baldin, G.N. Baranov, A.K. Barladyan, A.Yu. Barnyakov, M.Yu. Barnyakov, S.E. Baru, I.Yu. Basok, A.M. Batrakov, E.A. Bekhtenev, A.E. Blinov, V.E. Blinov, A.V. Bobrov, V.S. Bobrovnikov, A.V. Bogomyagkov, A.E. Bondar, A.R. Buzykaev, P.B. Cheblakov, V.L. Dorohov, S.I. Eidelman, D.N. Grigoriev, S.A. Glukhov, S.E. Karnaev, G.V. Karpov, S.V. Karpov, K.Yu. Karukina, D.P. Kashtankin, T.A. Kharlamova, V.A. Kiselev, V.V. Kolmogorov, S.A. Kononov, K.Yu. Kotov, A.A. Krasnov, E.A. Kravchenko, V.N. Kudryavtsev, V.F. Kulikov, G.Ya. Kurkin, I.A. Kuyanov, E.A. Kuper, E.B. Levichev, D.A. Maksimov, V.M. Malyshev, A.L. Maslennikov, O.I. Meshkov, S.I. Mishnev, I.A. Morozov, I.I. Morozov, N.Yu. Muchnoi, 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, G.A. Savinov, A.G. Shamov, D.N. Shatilov, D.A. Shvedov, B.A. Shwartz, E.A. Simonov, S.V. Sinyatkin, A.N. Skrinsky, A.V. Sokolov, D.P. Sukhanov, A.M. Sukharev, E.V. Starostina, A.A. Talyshev, V.A. Tayursky, V.I. Telnov, Yu.A. Tikhonov, K.Yu. Todyshev, A.G. Tribendis, G.M. Tumaikin, Yu.V. Usov, A.I. Vorobiov, V.N. Zhilich, A.A. Zhukov, V.V. Zhulanov, and A.N. Zhuravlev

Subjects
Physics, QC1-999
Abstract

The product of the electronic width of the ψ(2S) meson and the branching fraction of its decay to the muon pair was measured in the e+e−→ψ(2S)→μ+μ− process using nine data sets corresponding to an integrated luminosity of about 6.5 pb−1 collected with the KEDR detector at the VEPP-4M electron–positron collider:Γee×Bμμ=19.3±0.3±0.5eV. Adding the previous KEDR results on hadronic and leptonic channels, the values of the ψ(2S) electronic width were obtained under two assumptions: either with the assumption of lepton universalityΓee=2.279±0.015±0.042keV or without it, summing up hadronic and three independent leptonic channelsΓee=2.282±0.015±0.042keV. Keywords: ψ(2S) meson, Leptonic width, Branching fraction

Published
2018
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3. Measurement of R between 1.84 and 3.05 GeV at the KEDR detector

Author

V.V. Anashin, V.M. Aulchenko, E.M. Baldin, A.K. Barladyan, A.Yu. 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.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.A. Kuper, 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, and A.N. Zhuravlev

Subjects
Physics, QC1-999
Abstract

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%.

Published
2017
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4. Measurement of Ruds and R between 3.12 and 3.72 GeV at the KEDR detector

Author

V.V. Anashin, V.M. Aulchenko, E.M. Baldin, A.K. Barladyan, A.Yu. 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.V. Bogomyagkov, A.E. Bondar, A.A. Borodenko, 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.A. Kuper, 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, V.V. Petrov, S.G. Pivovarov, P.A. Piminov, 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, and A.N. Zhuravlev

Subjects
Physics, QC1-999
Abstract

Using the KEDR detector at the VEPP-4M e+e− collider, we have measured the values of Ruds and R at seven points of the center-of-mass energy between 3.12 and 3.72 GeV. The total achieved accuracy is about or better than 3.3% at most of energy points with a systematic uncertainty of about 2.1%. At the moment it is the most accurate measurement of R(s) in this energy range.

Published
2016
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5. Final analysis of KEDR data on J/ψ and ψ(2S) masses

Author

V.V. Anashin, V.M. Aulchenko, E.M. Baldin, A.K. Barladyan, A.Yu. 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.V. Bogomyagkov, A.E. Bondar, A.A. Borodenko, A.R. Buzykaev, S.I. Eidelman, D.N. Grigoriev, Yu.M. Glukhovchenko, S.E. Karnaev, G.V. Karpov, S.V. Karpov, 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.A. Kuper, 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, and A.N. Zhuravlev

Subjects
Physics, QC1-999
Abstract

We present the analysis of all KEDR data on the determination of J/ψ and ψ(2S) masses. The data comprise six scans of J/ψ and seven scans of ψ(2S) which were performed at the VEPP-4M e+e− collider in 2002–2008. The beam energy was determined using the resonance depolarization method. The detector and accelerator conditions during scans were very different that increases the reliability of the averaged results. The analysis accounts for partial correlations of systematic uncertainties on the masses. The following mass values were obtained:MJ/ψ=3096.900±0.002±0.006 MeV,Mψ(2S)=3686.099±0.004±0.009 MeV. These results supersede our previous measurements published in 2003 and 2012.

Published
2015
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6. Measurement of J/ψ→γηc decay rate and ηc parameters at KEDR

Author

V.V. Anashin, V.M. Aulchenko, E.M. Baldin, A.K. Barladyan, A.Yu. Barnyakov, M.Yu. Barnyakov, S.E. Baru, I.Yu. Basok, I.V. Bedny, A.E. Blinov, V.E. Blinov, A.V. Bobrov, V.S. Bobrovnikov, A.V. Bogomyagkov, A.E. Bondar, A.R. Buzykaev, S.I. Eidelman, Yu.M. Glukhovchenko, V.V. Gulevich, D.V. Gusev, S.E. Karnaev, G.V. Karpov, S.V. Karpov, T.A. Kharlamova, V.A. Kiselev, S.A. Kononov, K.Yu. Kotov, E.A. Kravchenko, V.F. Kulikov, G.Ya. Kurkin, E.A. Kuper, E.B. Levichev, D.A. Maksimov, V.M. Malyshev, A.L. Maslennikov, A.S. Medvedko, 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, I.O. Orlov, A.A. Osipov, S.V. Peleganchuk, S.G. Pivovarov, P.A. Piminov, V.V. Petrov, A.O. Poluektov, G.E. Pospelov, 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, V.V. Smaluk, 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, A.N. Yushkov, V.N. Zhilich, V.V. Zhulanov, and A.N. Zhuravlev

Subjects
Physics, QC1-999
Abstract

Using the inclusive photon spectrum based on a data sample collected at the J/ψ peak with the KEDR detector at the VEPP-4M e+e− collider, we measured the rate of the radiative decay J/ψ→γηc as well as ηc mass and width. Taking into account an asymmetric photon lineshape we obtained Γγηc0=2.98±0.18−0.33+0.15keV, Mηc=2983.5±1.4−3.6+1.6MeV/c2, Γηc=27.2±3.1−2.6+5.4MeV. Keywords: Charmonium, Radiative decays

Published
2014
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8. Results on , , from KEDR

Author

E.M. Baldin, V.V. Anashin, V.M. Aulchenko, A.K. Barladyan, A.Yu. Barnyakov, M.Yu. Barnyakov, S.E. Baru, I.V. Bedny, O.L. Beloborodova, A.E. Blinov, V.E. Blinov, A.B. Bobrov, V.S. Bobrovnikov, A.V. Bogomyagkov, A.E. Bondar, D.V. Bondarev, A.R. Buzykaev, S.I. Eidelman, Yu.M. Glukhovchenko, V.R. Groshev, V.V. Gulevich, S.E. Karnaev, G.V. Karpov, S.V. Karpov, V.A. Kiselev, S.A. Kononov, T.A. Kozlova, K.Yu. Kotov, E.A. Kravchenko, E.V. Kremyanskaya, V.F. Kulikov, G.Ya. Kurkin, E.A. Kuper, E.B. Levichev, D.A. Maksimov, V.M. Malyshev, A.L. Maslennikov, A.S. Medvedko, 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, I.O. Orlov, A.A. Osipov, S.V. Peleganchuk, S.S. Petrosyan, S.G. Pivovarov, P.A. Piminov, V.V. Petrov, A.O. Poluektov, I.N. Popkov, G.E. Pospelov, V.G. Prisekin, A.A. Ruban, V.K. Sandyrev, G.A. Savinov, A.G. Shamov, D.N. Shatilov, B.A. Shwartz, E.A. Simonov, S.V. Sinyatkin, Yu.I. Skovpen, A.N. Skrinsky, V.V. Smaluk, A.M. Sukharev, A.A. Talyshev, V.A. Tayursky, V.I. Telnov, Yu.A. Tikhonov, K.Yu. Todyshev, G.M. Tumaikin, Yu.V. Usov, A.I. Vorobiov, A.N. Yushkov, V.N. Zhilich, V.V. Zhulanov, and A.N. Zhuravlev

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, D meson, Atomic and Molecular Physics, and Optics
Abstract

New measurements of ψ ( 2 S ) , ψ ( 3770 ) and D meson masses are presented. The results of the scans performed were used for determination of the products Γ e e × Γ e e / Γ for J / ψ and Γ e e × Γ μ μ / Γ for ψ ( 2 S ) .

Published
2008

9. New precise determination of the τ lepton mass at KEDR detector

Author

V.V. Anashin, V.M. Aulchenko, E.M. Baldin, A.K. Barladyan, A.Yu. Barnyakov, M.Yu. Barnyakov, S.E. Baru, I.V. Bedny, O.L. Beloborodova, A.E. Blinov, V.E. Blinov, A.B. Bobrov, V.S. Bobrovnikov, A.V. Bogomyagkov, A.E. Bondar, D.V. Bondarev, A.R. Buzykaev, V.P. Cherepanov, S.I. Eidelman, Yu.M. Glukhovchenko, V.V. Gulevich, S.E. Karnaev, G.V. Karpov, S.V. Karpov, V.A. Kiselev, S.A. Kononov, K.Yu. Kotov, E.A. Kravchenko, E.V. Kremyanskaya, V.F. Kulikov, G.Ya. Kurkin, E.A. Kuper, E.B. Levichev, D.A. Maksimov, V.M. Malyshev, A.L. Maslennikov, A.S. Medvedko, O.I. Meshkov, S.E. Mishnev, I.I. Morozov, N.Yu. Muchnoi, V.V. Neufeld, S.A. Nikitin, I.B. Nikolaev, A.P. Onuchin, S.B. Oreshkin, I.O. Orlov, A.A. Osipov, S.V. Peleganchuk, S.S. Petrosyan, S.G. Pivovarov, P.A. Piminov, V.V. Petrov, A.O. Poluektov, G.E. Pospelov, V.G. Prisekin, A.A. Ruban, V.K. Sandyrev, G.A. Savinov, A.G. Shamov, D.N. Shatilov, E.I. Shubin, B.A. Shwartz, V.A. Sidorov, E.A. Simonov, S.V. Sinyatkin, Yu.I. Skovpen, A.N. Skrinsky, V.V. Smaluk, A.M. Soukharev, M.V. Struchalin, A.A. Talyshev, V.A. Tayursky, V.I. Telnov, Yu.A. Tikhonov, K.Yu. Todyshev, G.M. Tumaikin, Yu.V. Usov, A.I. Vorobiov, A.N. Yushkov, V.N. Zhilich, and A.N. Zhuravlev

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, law, Detector, High Energy Physics::Experiment, Production (computer science), Collider, Mass measurement, Atomic and Molecular Physics, and Optics, High Energy Physics - Experiment, Lepton, law.invention
Abstract

The status of the experiment on the precise $\tau$ lepton mass measurement running at the VEPP-4M collider with the KEDR detector is reported. The mass value is evaluated from the $\tau^+\tau^-$ cross section behaviour around the production threshold. The preliminary result based on 6.7 pb$^{-1}$ of data is $m_{\tau}=1776.80^{+0.25}_{-0.23} \pm 0.15$ MeV. Using 0.8 pb$^{-1}$ of data collected at the $\psi'$ peak the preliminary result is also obtained: $\Gamma_{ee}B_{\tau\tau}(\psi') = 7.2 \pm 2.1$ eV., Comment: 6 pages, 8 figures; The 9th International Workshop on Tau-Lepton Physics, Tau06

Published
2007

10. Tau mass measurement at KEDR

Author

A.G. Shamov, V.V. Anashin, V.M. Aulchenko, E.M. Baldin, A.K. Barladyan, A.Yu. Barnyakov, M.Yu. Barnyakov, S.E. Baru, I.V. Bedny, O.L. Beloborodova, A.E. Blinov, V.E. Blinov, A.V. Bobrov, V.S. Bobrovnikov, A.V. Bogomyagkov, A.E. Bondar, D.V. Bondarev, A.R. Buzykaev, S.I. Eidelman, Yu.M. Glukhovchenko, V.V. Gulevich, S.E. Karnaev, G.V. Karpov, S.V. Karpov, V.A. Kiselev, S.A. Kononov, T.A. Kozlova, K.Yu. Kotov, E.A. Kravchenko, V.F. Kulikov, G.Ya. Kurkin, E.A. Kuper, E.B. Levichev, D.A. Maksimov, V.M. Malyshev, A.L. Maslennikov, A.S. Medvedko, 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, I.O. Orlov, A.A. Osipov, S.V. Peleganchuk, S.S. Petrosyan, S.G. Pivovarov, P.A. Piminov, V.V. Petrov, A.O. Poluektov, I.N. Popkov, G.E. Pospelov, V.G. Prisekin, A.A. Ruban, V.K. Sandyrev, G.A. Savinov, D.N. Shatilov, B.A. Shwartz, E.A. Simonov, S.V. Sinyatkin, Yu.I. Skovpen, A.N. Skrinsky, V.V. Smaluk, 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, A.N. Yushkov, V.N. Zhilich, V.V. Zhulanov, and A.N. Zhuravlev

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, law, Collider, Mass measurement, Atomic and Molecular Physics, and Optics, Lepton, law.invention
Abstract

The status of the experiment on the precise τ lepton mass measurement running at the VEPP-4M collider with the KEDR detector is reported. The mass value is evaluated from the τ + τ − cross section behavior around the production threshold. The preliminary result based on 15.2 pb −1 of data is m τ = 1776.69 −0.19 +0.17 ± 0.15 MeV .

Published
2009

11. High precision mass measurements in Ψ and ϒ families revisited

Author

A.S. Artamonov, S.E. Baru, A.E. Blinov, V.E. Blinov, A.E. Bondar, A.D. Bukin, A.G. Chilingarov, N.F. Denisov, S.I. Eidelman, Yu.I. Eidelman, V.R. Groshev, N.I. Inozemtsev, G.Ya. Kezerashvili, V.A. Kiselev, S.G. Klimenko, G.M. Kolachev, E.A. Kuper, L.M. Kurdadze, M.Yu. Lelchuk, S.I. Mishnev, S.A. Nikitin, A.P. Onuchin, E.V. Pakhtusova, V.S. Panin, V.V. Petrov, I.Ya. Protopopov, E.L. Saldin, A.G. Shamov, Yu.M. Shatunov, B.A. Shwartz, V.A. Sidorov, Yu.I. Skovpen, A.N. Skrinsky, V.A. Tayursky, V.I. Telnov, A.B. Temnykh, Yu.A. Tikhonov, G.M. Tumaikin, A.E. Undrus, A.I. Vorobiov, M.V. Yurkov, V.N. Zhilich, and A.A. Zholentz

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Physics::Instrumentation and Detectors, law, Radiative transfer, High Energy Physics::Experiment, Electron, Collider, Value (mathematics), law.invention
Abstract

High precision mass measurements in $\Psi$ and $\Upsilon$ families performed in 1980-1984 at the VEPP-4 collider with OLYA and MD-1 detectors are revisited. The corrections for the new value of the electron mass are presented. The effect of the updated radiative corrections has been calculated for the $J/\Psi(1S)$ and $\Psi(2S)$ mass measurements.

Published
2000

12. Soviet marine pollution legislation

Author

V.A. Kiselev and N.D. Koroleva

Subjects
Pollution, Economics and Econometrics, media_common.quotation_subject, Liability, Law of the sea, Legislation, Exclusive economic zone, Management, Monitoring, Policy and Law, Aquatic Science, Convention, Marine pollution, Environmental protection, Political science, Pollution prevention, Law, General Environmental Science, media_common
Abstract

Recent USSR legislation governing the Soviet exclusive economic zone is reviewed. Soviet municipal legislation on pollution control is compared against the provisions of the 1982 Law of the Sea (LOS) Convention, and points of noncompliance are identified. The method stipulated in Soviet legislation for calculating losses caused by pollution is highlighted as an area of special concern.

Published
1991

13. Surface aspects of excitons in semiconductors

Author

A.E. Cherednichenko and V.A. Kiselev

Subjects
Condensed Matter::Quantum Gases, chemistry.chemical_classification, Photoluminescence, Condensed matter physics, Condensed Matter::Other, Chemistry, business.industry, Exciton, Surfaces and Interfaces, General Chemistry, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, Condensed Matter Physics, Spectral line, Surfaces, Coatings and Films, Condensed Matter::Materials Science, Semiconductor, Electric field, Electron beam processing, business, Inorganic compound, Biexciton
Abstract

This review considers the factors which influence the exciton behavior at the semiconductor surface and, consequently, are revealed through excitonic optical spectra. The basic knowledge of excitons in semiconductors is first presented. The experimental exciton reflectance spectra of CdS and CdSe crystals are discussed followed by an analysis of the results which make use of the near-surface “dead-layer” model. In particular, the effect of the electron irradiation on the exciton reflectance lineshape and exciton photoluminescence is considered with reference to the physical factors which control optical spectra. Various mechanisms of localization of excitons in a semiconductor surface region are presented. Relevant experiments on low-temperature photoluminescence and reflectance are discussed. Finally, the effect on the exciton reflectance of the electric field of the space-charge layer is considered in detail.

Published
1991

15. Competition between charging and discharging surface reactions as a mechanism for the Fermi-level pinning at semiconductor surfaces

Author

V.A. Kiselev

Subjects
surface charge, Ga, 02 engineering and technology, semiconductors, Ag, chemisorption, In, 01 natural sciences, surface chemical reactions, surface barrier formation, Mn, compensation, Surface conductivity, symbols.namesake, semiconductor surfaces, inversion, Al, Adsorption, 0103 physical sciences, Cl, surface electron states, Au, Fermi level pinning, Surface charge, 010306 general physics, Inorganic compound, chemistry.chemical_classification, Condensed matter physics, Chemistry, Fermi level, GaAs, discharging reactions, Active surface, neutralization, 021001 nanoscience & nanotechnology, Space charge, Chemisorption, kinetics, adsorption, GaAs 110 surface, [PHYS.HIST]Physics [physics]/Physics archives, symbols, charging reactions, conductivity type, 0210 nano-technology, Sb
Abstract

A new mechanism for the Fermi-level pinning at semiconductor surfaces is proposed. It is based on consideration of electrically active surface chemical reactions which create or destroy the surface charge. Mutual neutralization of the charging and discharging reactions leads to the Fermi-level pinning. The compensation of charge flows is caused by inversion of the conductivity type at the surface. In this case the Fermi-Level is pinned near mid-gap. The normal and anomalous kinetics of surface-barrier formation for adsorption of O, S, Cl, Al, Au, Ag, In, Ga, Mn and Sb on GaAs(110) surface are interpreted in a two-mode chemisorption model Un nouveau mecanisme de l'accrochage («pinning») du niveau de Fermi a la surface des semiconducteurs est propose. Il est base sur l'examen de reactions chimiques electriquement actives qui creeent ou detruisent la charge de surface. La neutralisation mutuelle des reactions de charge et decharge conduit a l'accrochage du niveau Fermi. La compensation des ecoulements de charges est due a l'inversion du type de conductivite en surface. Dans ce cas le niveau de Fermi est accroche au milieu de la bande interdite. Les cinetiques normales et anormales de formation de barrieres de surface lors de l'adsorption de O, S, Cl, Al, Au, Ag, In, Ga, Mn et Sb sur la surface de GaAs (110) sont interpretees suivant deux modes de chimisorption

Published
1990

17. ‘Special areas’ for preventing pollution of the sea

Author

V.A. Kiselev

Subjects
Pollution, Economics and Econometrics, Environmental protection, media_common.quotation_subject, Vulnerability, Environmental science, Management, Monitoring, Policy and Law, Aquatic Science, Law, Environmental planning, General Environmental Science, media_common
Abstract

This article looks at how in various parts of the seas and oceans the marine environment has been subjected to pollution, the vulnerability to which also varies depending on oceanographical and ecological conditions. Consequently, the international norms and standards intended for universal application with regard to preventing pollution of the sea from ships may prove to be inadequate to protect the marine environment of individual areas of the oceans.

Published
1988

18. The optical properties of the excitons in thin crystals with surface heterolayers

Author

V.A. Kiselev

Subjects
Condensed Matter::Quantum Gases, Phase change, Materials science, Condensed matter physics, Condensed Matter::Other, Exciton, Materials Chemistry, Perturbation (astronomy), General Chemistry, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, Condensed Matter Physics, Biexciton, Spectral line
Abstract

Effect of the short-range near-surface exciton potential on the interference spectra of thin crystals is studied theoretically. The potential modeled by a right-angled well or step leads to a strong perturbation both of the Fabry-Perot structure and the one due to the interference of the additional waves. Several effects are discussed. The most interesting one is the correlation between the localization of the exciton in the near-surface potential well and the change by π of the exciton-wave phase. The surface exciton is displayed by a strong maximum in reflection spectra, and the phase change results in the almost entire quenching of the additional interference structure.

Published
1982

20. Plasma wakefield diagnostics using probe electron beam and microchannel plates

Author

A.P. Tolstoluzhsky, I.N. Onishchenko, V.A. Kiselev, A.K. Berezin, V.I. Karas, V. A. Balakirev, and Ya. B. Fainberg

Subjects
Physics, Microchannel, business.industry, Amplifier, Particle accelerator, Electron, law.invention, Optics, law, Cathode ray, Physics::Accelerator Physics, Plasma diagnostics, Atomic physics, business, Beam (structure), Electron gun
Abstract

The analytical and numerical investigations of trajectories of the probe beam electrons in the two dimensional wakefield, excited in plasma by a dense bunch of relativistic electrons with Gauss longitudinal and transverse distribution of density is carried out. On the basis of calculations of probe beam deviations, the diagnostic instrument is developed for parameters of experiments conducted in NSC KIPT. The diagnostic instruments consist of an electron gun forming the electron beam with energy 10 KeV, current 10 /spl mu/A and diameter 2 mm which passes through the chamber of interaction and falls on a collector of diameter 10 mm. A collector (screen) is placed in front of the first plate of a microchannel amplifier which consists of three microchannel plates (MCP) with sizes 20-30 mm. The voltage of 3 kV was applied to each plate. Total amplification of MCP amplifier is 10/sup 4/-10/sup 5/ in dependence on quantity of particles, falling on the first plate. As a result the deviations of probe beam by excited wakefield the electrons fall on the first plate of the amplifier and are registered by the anode of the amplifier, located behind the third plates. Calculated probe beam deviations and obtained amplification of MCP amplifier permit investigation of the electrical wakefields, excited by the sequence of relativistic bunches (number of particles in bunch is 2/spl middot/10/sup 9/, energy is 14 MeV) in plasma of density 10/sup 11/-10/sup 13/ cm/sup -3/. The maximal value of the fields registered by such a technique is not less 2 kV/cm.

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