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101. Precise measurements of the hadronic cross sections with the CMD-3 and SND detectors at the VEPP-2000e+e−collider

Author

L.V. Kardapoltsev, Z. K. Silagadze, Konstantin Beloborodov, Alexey Anisenkov, E.A. Perevedentsev, I.M. Zemlyansky, V.M. Titov, Yu. M. Shatunov, V. P. Druzhinin, Yu. A. Rogovsky, A. E. Obrazovsky, I.B. Logashenko, Yu. M. Zharinov, B.A. Shwartz, A.E. Ryzhenenkov, Alexey Kharlamov, Aleksandr Korol, E. M. Gromov, A.V. Vasiljev, P. Lukin, A. P. Lysenko, Yu.N. Pestov, A.A. Grebenuk, Yu.S. Popov, Alexey Talyshev, E. P. Solodov, S.E. Gayazov, K.Yu. Mikhailov, P. Yu. Shatunov, A.E. Kuzmenko, A.I. Vorobiov, K. A. Grevtsov, Yu.V. Yudin, A.A. Ruban, V. B. Golubev, N.M. Ryskulov, L.M. Barkov, E.A. Kozyrev, A. A. Botov, Vassili Kazanin, D. B. Shwartz, D.A. Shtol, A.S. Kuzmin, G.V. Fedotovich, I. K. Surin, D. A. Epifanov, Sergey Serednyakov, I. A. Koop, S.V. Koshuba, Fedor Ignatov, A.L. Sibidanov, Semen Eidelman, A. Yu. Barnyakov, B.I. Khazin, E.V. Pakhtusova, M. N. Achasov, P. Krokovny, A. N. Kirpotin, A.V. Dimova, A.V. Otboev, D.N. Shemyakin, G.P. Razuvaev, V.M. Aulchenko, O.A. Kovalenko, V.S. Okhapkin, A.N. Kozyrev, V.E. Shebalin, A.L. Romanov, D.N. Grigoriev, A.S. Popov, Alexander Bogdanchikov, K. A. Martin, A. S. Kupich, L.B. Epshteyn, A.L. Erofeev, D.E. Berkaev, V.S. Banzarov, R.R. Akhmetshin, A. V. Berdyugin, N.S. Bashtovoy, A.V. Bragin, D.P. Kovrizhin, A.E. Bondar, and S.V. Karpov

Subjects
Physics, Particle physics, Luminosity (scattering theory), Muon, Physics::Instrumentation and Detectors, QC1-999, Electron–positron annihilation, Hadron, Standard Model, law.invention, Nuclear physics, law, High Energy Physics::Experiment, Collider, VEPP-2000, Fermi Gamma-ray Space Telescope
Abstract

It’s good known the difference in 3.5 sigma between the muon (g – 2) experimental result and its calculation in Standard Model. To clarify this intriguing discrepancy the new stage of muon (g – 2) measurement is under preparation at Fermi National Laboratory. On other hand, regular data taking for measurements of hadron cross section production in e + e − annihilations is under way since December 2010 at the electron-positron collider VEPP-2000 with the CMD-3 and SND detectors. The collected data sample corresponds to about 60 inverse picobarns of integrated luminosity per detector in the energy range from 0.32 up to 2 GeV. Preliminary analysis of various hadronic cross sections has been performed.

Published
2014

102. RESULTS AND PERSPECTIVES ON NUCLEON FORM FACTORS FROM SND AND CMD-3

Author

Yu. M. Shatunov, P.A. Lukin, E.A. Perevedentsev, Alexander Bogdanchikov, A. A. Botov, A.S. Kuzmin, P. Yu. Shatunov, K. A. Grevtsov, V.M. Aulchenko, D.N. Grigoriev, A.N. Kozyrev, L. V. Kardapoltsev, A.L. Romanov, A.S. Popov, Ilya Zemlyansky, D.E. Berkaev, A.L. Sibidanov, S. I. Serednyakov, O.A. Kovalenko, I. K. Surin, S.V. Karpov, G.V. Fedotovich, I. A. Koop, M. N. Achasov, S.V. Koshuba, B.I. Khazin, Alexey Kharlamov, Yu.V. Yudin, K.Yu. Mikhailov, K. A. Martin, V. P. Druzhinin, A. S. Kupich, S.E. Gayazov, A.V. Bragin, A. P. Lysenko, A.L. Erofeev, I.B. Logashenko, S.I. Eidelman, A.A. Grebenuk, Aleksandr Korol, V. S. Banzarov, A.A. Ruban, G.P. Razuvaev, Fedor Ignatov, A. N. Kirpotin, A.E. Kuzmenko, D.N. Shemyakin, V.M. Titov, Yu. M. Zharinov, E. M. Gromov, Z. K. Silagadze, Yu. A. Rogovsky, V.E. Shebalin, A.I. Vorobiov, A. E. Obrazovsky, D.P. Kovrizhin, L.B. Epshteyn, Yu.N. Pestov, B.A. Shwartz, Alexey Talyshev, A.E. Ryzhenenkov, N.M. Ryskulov, E.A. Kozyrev, D. A. Epifanov, T. V. Dimova, V. B. Golubev, A. Yu. Barnyakov, A. V. Vasiljev, P. Krokovny, E. P. Solodov, Vassili Kazanin, E. V. Pakhtusova, Yu.S. Popov, L.M. Barkov, D. A. Shtol, V.S. Okhapkin, A.E. Bondar, Konstantin Beloborodov, Alexey Anisenkov, R.R. Akhmetshin, A. V. Berdyugin, and N.S. Bashtovoy

Subjects
Nuclear physics, Physics, Particle physics, Near threshold, law, Form factor (quantum field theory), Nucleon, Collider, Measure (mathematics), law.invention
Abstract

During years 2011 and 2012 data taking runs have been carried out at VEPP-2000 e+e- collider to measure the production of the nucleon-antinucleon pairs [Formula: see text] near threshold. In this talk the preliminary results on the nucleon timelike electromagnetic form factors (FF) and the |GE/GM| ratio are presented.

Published
2014

103. MEASUREMENT OF THE $e^+e^- \to p \bar{p}$ CROSS SECTION WITH THE CMD-3 DETECTOR AT VEPP-2000

Author

E.A. Perevedentsev, D.N. Grigoriev, B.A. Shwartz, V.S. Okhapkin, Yu. M. Shatunov, A.E. Ryzhenenkov, D. B. Shwartz, E. P. Solodov, P.A. Lukin, A. P. Lysenko, S.I. Eidelman, V.E. Shebalin, Yu.V. Yudin, A.I. Vorobiov, Alexey Anisenkov, A.A. Grebenuk, Vassili Kazanin, A.S. Popov, A.L. Sibidanov, K.Yu. Mikhailov, B.I. Khazin, A.S. Kuzmin, Yu.S. Popov, D.E. Berkaev, Yu. A. Rogovsky, I.B. Logashenko, V.M. Aulchenko, L.M. Barkov, Yu.N. Pestov, A.N. Kozyrev, A.L. Romanov, S.E. Gayazov, V.M. Titov, A.L. Erofeev, I. A. Koop, A.E. Kuzmenko, Yu. M. Zharinov, A. N. Kirpotin, N.M. Ryskulov, A.A. Ruban, A.V. Bragin, D.N. Shemyakin, L.B. Epshteyn, Fedor Ignatov, V. S. Banzarov, P. Yu. Shatunov, G.V. Fedotovich, R.R. Akhmetshin, N.S. Bashtovoy, G.P. Razuvaev, Alexey Talyshev, O.A. Kovalenko, S.V. Karpov, E.A. Kozyrev, E. M. Gromov, D. A. Epifanov, and P. Krokovny

Subjects
Physics, Particle physics, Luminosity (scattering theory), Physics::Instrumentation and Detectors, Bar (music), Detector, law.invention, Nuclear physics, Event selection, Cross section (physics), law, High Energy Physics::Experiment, Collider, VEPP-2000, Energy (signal processing)
Abstract

We report preliminary results on the measurement of the [Formula: see text] cross section with the CMD-3 detector at the VEPP-2000 electron-positron collider based on 4.5 pb-1 of integrated luminosity collected in the c.m. energy range 1.92 - 2.0 GeV. Event selection using information from the Drift Chamber and Calorimeters provides a clean sample of [Formula: see text] events. The obtained results are in good agreement with the previous measurements.

Published
2014

104. HADRONIC CROSS SECTION MEASUREMENT AT CMD-3

Author

O.A. Kovalenko, S.V. Karpov, P.A. Lukin, V.E. Shebalin, A.I. Vorobiov, D.N. Grigoriev, Yu.S. Popov, E. M. Gromov, A.L. Erofeev, L.M. Barkov, E. P. Solodov, Yu. M. Shatunov, Yu.V. Yudin, A.L. Sibidanov, A.V. Bragin, B.I. Khazin, A.A. Grebenuk, D.E. Berkaev, S.E. Gayazov, Fedor Ignatov, A. P. Lysenko, A.S. Kuzmin, Vassili Kazanin, L.B. Epshteyn, A.A. Ruban, A. N. Kirpotin, D.N. Shemyakin, A.S. Popov, E.A. Perevedentsev, Yu. A. Rogovsky, V.M. Titov, D. B. Shwartz, R.R. Akhmetshin, Yu. M. Zharinov, P. Yu. Shatunov, K.Yu. Mikhailov, N.S. Bashtovoy, S.I. Eidelman, G.V. Fedotovich, V.S. Okhapkin, V.M. Aulchenko, A.N. Kozyrev, A.L. Romanov, I. A. Koop, P. Krokovny, Alexey Talyshev, V. S. Banzarov, N.M. Ryskulov, E.A. Kozyrev, Alexey Anisenkov, B.A. Shwartz, A.E. Ryzhenenkov, D. A. Epifanov, I.B. Logashenko, G.P. Razuvaev, Yu.N. Pestov, and A.E. Kuzmenko

Subjects
Nuclear physics, Physics, Cross section (physics), Particle physics, Range (particle radiation), law, Hadron, Detector, Collider, law.invention
Abstract

The VEPP-2000 electron-positron collider was commissioned in 2010. About 60 pb-1 were collected so far by CMD-3 detector in the whole available c.m. energy range from 0.32 GeV to 2.0 GeV. The preliminary results of data analysis for various modes of e+e− → hadrons are discussed.

Published
2014

105. STUDY OF THE PROCESS e+e- → K+K-π+π- WITH THE CMD-3 DETECTOR AT THE VEPP-2000 e+e- COLLIDER

Author

Yu.S. Popov, N.S. Bashtovoy, Alexey Anisenkov, L.M. Barkov, P. Yu. Shatunov, E. P. Solodov, G.V. Fedotovich, D.E. Berkaev, R.R. Akhmetshin, A.A. Grebenuk, Vassili Kazanin, N.M. Ryskulov, E.A. Perevedentsev, V.M. Titov, A.L. Erofeev, Yu. M. Zharinov, V. S. Banzarov, P.A. Lukin, S.E. Gayazov, A.V. Bragin, O.A. Kovalenko, S.V. Karpov, A.A. Ruban, V.S. Okhapkin, A.S. Kuzmin, Fedor Ignatov, A.S. Popov, L.B. Epshteyn, E. M. Gromov, V.E. Shebalin, A.I. Vorobiov, A.L. Sibidanov, K.Yu. Mikhailov, I.B. Logashenko, B.I. Khazin, S.I. Eidelman, Yu. M. Shatunov, A. P. Lysenko, I. A. Koop, P. Krokovny, Yu.V. Yudin, Yu. A. Rogovsky, A. N. Kirpotin, D.N. Grigoriev, D.N. Shemyakin, V.M. Aulchenko, Yu.N. Pestov, A.N. Kozyrev, A.L. Romanov, A.E. Kuzmenko, D. B. Shwartz, B.A. Shwartz, A.E. Ryzhenenkov, Alexey Talyshev, E.A. Kozyrev, D. A. Epifanov, and G.P. Razuvaev

Subjects
Nuclear physics, Physics, Particle physics, Range (particle radiation), law, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Hadron, Detector, Collider, VEPP-2000, law.invention, Luminosity
Abstract

We report preliminary results on the measurement of the cross section of the process e+e- → K+K-π+π- in the c.m. energy range from 1.5 GeV to 2 GeV. It is shown that the cross section is dominated by the contributions of several intermediate states K+K-ρ, K*Kπ, ϕπ+π- and K*K*.

Published
2014

106. Measurement of hadronic cross-sections in $e^+e^-$ collisions below 1.4 GeV at CMD

Author

S. Eidelman, N.M. Ryskulov, A.A. Ruban, S.I. Redin, P.Yu. Stepanov, P. Krokovny, V. M. Aulchenko, D.V. Chernyak, A.E. Bondar, E. P. Solodov, V.M. Titov, A.I. Sukhanov, A.G. Shamov, Yu. Y. Yudin, A.S. Kuzmin, P.A. Lukin, I.B. Logashenko, D.A. Gorbachev, Igor Nesterenko, T.A. Purlatz, F.V. Ignatov, A.N. Skrinsky, B. Shwartz, A.S. Popov, S.G. Zverev, L. M. Barkov, A.A. Grebenyuk, K.Yu. Mikhailov, I. G. Snopkov, Yu. M. Shatunov, V. S. Banzarov, Ivan Koop, A.V. Bragin, N. Gabyshev, A.I. Milshtein, A.A. Polunin, J. A. Thompson, A. P. Lysenko, R.R. Akhmetshin, N.S. Bashtovoy, B. I. Khazin, D.V. Bondarev, Vladimir Smakhtin, S.E. Baru, V.S. Okhapkin, Vassili Kazanin, Satish Dhawan, Sergei V. Karpov, V. W. Hughes, N.I. Root, E.V. Anashkin, Vladimir A. Sidorov, A.L. Sibidanov, G.V. Fedotovich, D. N. Grigorev, J. P. Miller, and B. L. Roberts

Subjects
Physics, Nuclear physics, Particle physics, Electron–positron annihilation, Hadron
Published
2001

107. Observation of the conversion decay $\phi\to\pi^0e^+e^-$ at CMD-2

Author

E. P. Solodov, V.A. Sidorov, A.S. Popov, K.Yu. Mikhailov, P.Yu. Stepanov, R.R. Akhmetshin, A.N. Skrinsky, Vassili Kazanin, P.A. Lukin, P. Krokovny, T.A. Purlatz, A.V. Bragin, A.L. Sibidanov, V.M. Titov, S.I. Eidelman, V.M. Aulchenko, E.V. Anashkin, Yu. M. Shatunov, S.V. Karpov, A.A. Grebeniuk, N.M. Ryskulov, F.V. Ignatov, A.S. Kuzmin, B.I. Khazin, A.V. Otboev, G.V. Fedotovitch, N. Gabyshev, A.G. Shamov, D.N. Grigoriev, V.S. Okhapkin, V. W. Hughes, Ivan Koop, Yu.V. Yudin, V.Sh. Banzarov, Igor Nesterenko, I.G. Snopkov, N.I. Root, E.A. Perevedentsev, Alexander Valishev, L.M. Kurdadze, L.M. Barkov, D.V. Chernyak, P.M. Ivanov, N.S. Bashtovoy, A.E. Bondar, J. A. Thompson, M. Arpagaus, M. Lechner, D.V. Bondarev, V.P. Smakhtin, A.A. Ruban, I.B. Logashenko, A.I. Sukhanov, B.A. Shwartz, and S.G. Zverev

Subjects
Physics, Nuclear and High Energy Physics, Range (particle radiation), Branching fraction, Atomic physics, Energy (signal processing), High Energy Physics - Experiment
Abstract

Using 15.1^{-1} of data collected by CMD-2 in the $\phi$-meson energy range, the branching ratio of the conversion decay $\phi\to\pi^0e^+e^-$ has been measured for the first time: B(\phi\to\pi^0e^+e^-) = (1.22 \pm 0.34 \pm 0.21) \cdot 10 ^{-5}., Comment: 13 pages, 6 PostScript figures, uses refmerge.sty. To be published in Phys. Lett. B

Published
2000

108. Observation of $K_S^0$ semileptonic decays with CMD-2 detector

Author

Yu. M. Shatunov, Ivan Koop, K.Yu. Mikhailov, Igor Nesterenko, S.V. Karpov, N.M. Ryskulov, P.A. Lukin, E. P. Solodov, A.A. Grebeniuk, V.A. Sidorov, A.G. Shamov, N. Gabyshev, A.A. Ruban, M. Arpagaus, S.G. Zverev, B. Shwartz, D.N. Grigoriev, V.S. Okhapkin, V.M. Titov, D.V. Bondarev, A.I. Shekhtman, V.P. Smakhtin, B.I. Khazin, A.S. Popov, V.Sh. Banzarov, P.Yu. Stepanov, R.R. Akhmetshin, T.A. Purlatz, A.N. Skrinsky, Evgeny Perevedentsev, S.E. Baru, Yu.V. Yudin, P.M. Ivanov, N.S. Bashtovoy, E.V. Anashkin, A.I. Sukhanov, N.I. Root, I.B. Logashenko, S. Eidelman, G.V. Fedotovich, L.M. Kurdadze, I.G. Snopkov, V. M. Aulchenko, A.S. Dvoretsky, J. A. Thompson, A.V. Bragin, A.G. Chertovskikh, A.S. Kuzmin, D.V. Chernyak, A. Bondar, and L.M. Barkov

Subjects
Nuclear physics, Physics, High Energy Physics - Experiment (hep-ex), Nuclear and High Energy Physics, Particle physics, law, Branching fraction, Detector, FOS: Physical sciences, Collider, law.invention, High Energy Physics - Experiment
Abstract

The decay $K_S^0 \to \pi e \nu$ has been observed by the CMD-2 detector at the e^+e^- collider VEPP-2M at Novosibirsk. Of 6 million produced $K_L^0K_S^0$ pairs, $75 \pm 13$ events of the $K_S^0 \to \pi e \nu$ decay were selected. The corresponding branching ratio is $B(K_S^0 \to \pi e \nu)=(7.2 \pm 1.4)\times10^{-4}$. This result is consistent with the evaluation of $B(K_S^0 \to \pi e \nu)$ from the $K_L^0$ semileptonic rate and $K_S^0$ lifetime assuming $\Delta S=\Delta Q$ ., Comment: 7 pages, 6 figures, LaTex2e. Submitted to Phys.Lett.B

Published
1999

109. a_1(1260) dominance in the process e+e- \to 4\pi at energies 1.05--1.38 GeV

Author

Igor Nesterenko, A.E. Bondar, G.V. Fedotovitch, N.I. Root, P.Yu. Stepanov, B.I. Khazin, Alexander Valishev, V.Sh. Banzarov, A.S. Kuzmin, A.I. Sukhanov, S.I. Eidelman, D.N. Grigoriev, B.A. Shwartz, P.M. Ivanov, A. I. Milstein, V.P. Smakhtin, V.M. Aulchenko, S.G. Zverev, N.S. Bashtovoy, A.G. Chertovskikh, E.A. Perevedentsev, N.M. Ryskulov, I.G. Snopkov, E.V. Anashkin, M. Arpagaus, P.A. Lukin, D.V. Chernyak, A.S. Popov, A.L. Sibidanov, I.B. Logashenko, A.V. Otboev, T.A. Purlatz, A.A. Polunin, L.M. Barkov, V.S. Okhapkin, K.Yu. Mikhailov, N. Gabyshev, V.M. Titov, L.M. Kurdadze, Yu.V. Yudin, V. W. Hughes, A.V. Bragin, R.R. Akhmetshin, Yu. M. Shatunov, E. P. Solodov, D.V. Bondarev, A.A. Ruban, Ivan Koop, Vassili Kazanin, A. P. Lysenko, J. A. Thompson, A.I. Shekhtman, A.N. Skrinsky, M. S. Korostelev, A.A. Grebeniuk, A.G. Shamov, V.A. Sidorov, S.V. Karpov, A.S. Dvoretsky, and P. Krokovny

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Range (particle radiation), Electron–positron annihilation, Atomic physics, High Energy Physics - Experiment
Abstract

First results of the study of the process e+e- \to 4\pi by the CMD-2 collaboration at VEPP-2M are presented for the energy range 1.05--1.38 GeV. Using an integrated luminosity of 5.8 pb^{-1}, energy dependence of the processes e+e- \to \pi^+\pi^- 2\pi^0 and e+e- \to 2\pi^+ 2\pi^- has been measured. Analysis of the differential distributions demonstrates the dominance of the a_1\pi and \omega\pi intermediate states. Upper limits for the contributions of other alternative mechanisms are also placed., Comment: 31 pages, 13 figures, LaTex2e

Published
1999

110. Measurement of the e[sup +]e[sup −]→π[sup +]π[sup −] cross-section with the CMD-2 detector

Author

P.Yu. Stepanov, E. G. Pozdeev, Yu. M. Shatunov, P.A. Lukin, T.A. Purlatz, Ivan Koop, V. A. Astakhov, A.A. Grebeniuk, A.G. Shamov, Yu. Y. Yudin, A.S. Kuzmin, A. P. Lysenko, N. Gabyshev, A. V. Klimenkov, B. I. Khazin, D.N. Grigoriev, Evgeny Perevedentsev, Viatcheslav Danilov, Vladimir Smakhtin, N.I. Root, J. A. Thompson, A.E. Bondar, A.G. Chertovskikh, G.V. Fedotovich, D.V. Chernyak, M. Lechner, L. M. Barkov, V. M. Aulchenko, A.A. Ruban, A.A. Polunin, A.I. Shekhtman, S. Eidelman, L.M. Kurdadze, V. W. Hughes, D. H. Brown, Yu.I Merzlyakov, A.S. Dvoretsky, E.V Popkov, E.V. Anashkin, Vladimir A. Sidorov, B. Shwartz, B. L. Roberts, M.A Shubin, N.M. Ryskulov, A.V Maksimov, I. G. Snopkov, V. S. Banzarov, S.E. Baru, V.I Ptitzyn, P.M. Ivanov, E. P. Solodov, G.A Aksenov, Vassili Kazanin, V.S. Okhapkin, S.G. Zverev, M. Arpagaus, I.B. Logashenko, Igor Nesterenko, A.I. Sukhanov, A.N. Skrinsky, R.R. Akhmetshin, and N.S. Bashtovoy

Subjects
Physics, Range (particle radiation), Particle physics, Luminosity (scattering theory), Annihilation, Meson, Detector, Astrophysics::Cosmology and Extragalactic Astrophysics, Particle identification, law.invention, Nuclear physics, Pion, law, Astrophysics::Solar and Stellar Astrophysics, Physics::Accelerator Physics, High Energy Physics::Experiment, Collider
Abstract

The general purpose detector CMD-2 at the VEPP-2M electron-positron collider at Novosibirsk has collected about 11 pb−1 of integrated luminosity in the center-of-mass energy range from 0.36 up to 1.38 GeV. Data in the ρ-meson energy range from 0.61 to 0.96 GeV have been analysed and preliminary results on the e+e−→π+π− cross-section in this energy range are presented.

Published
1998

111. Study of KS KL Coupled Decays and KL -Be Interactions with the CMD-2 Detector at VEPP-2M Collider

Author

V.A. Sidorov, Igor Nesterenko, B.O Baibusinov, A.E Sher, I. A. Koop, N.M. Ryskulov, J. A. Thompson, E.A. Perevedentsev, N.I. Root, G.V. Fedotovich, D.H Brown, M.A Shubin, V.G Zavarzin, V.V Danilov, Yu. M. Shatunov, A.P. Lysenko, S.I. Eidelman, A.A. Ruban, S.I. Redin, V.M. Titov, A.A. Grebeniuk, Yu.V. Yudin, A. Bondar, L.M. Barkov, A.A. Polunin, V.P. Smakhtin, A.I. Sukhanov, E.V Popkov, D.N. Grigoriev, V.M Aulchenko, B.A. Shwartz, E.V Anashkin, A.V Maksimov, B.I. Khazin, Alexander Skrinsky, B.L. Roberts, I.B. Logashenko, V. S. Banzarov, E. P. Solodov, G.A Aksenov, A.S. Kuzmin, V.I Ptitzyn, P.M. Ivanov, D.V. Chernyak, V.S. Okhapkin, I.G. Snopkov, S. K. Dhawan, Yu.I Merzlyakov, S.E Baru, T. A. Purlats, P.A. Lukin, C.M Valine, W. A. Worstell, V. W. Hughes, N. Gabyshev, P. Cushman, R.R. Akhmetshin, and J. P. Miller

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Luminosity (scattering theory), Meson, Detector, High Energy Physics::Phenomenology, Charged particle, law.invention, High Energy Physics - Experiment, Nuclear physics, Angular distribution, law, High Energy Physics::Experiment, Collider, Beam (structure)
Abstract

The integrated luminosity about 4000 inverse nanobarn of around phi meson mass ( 5 millions of phi mesons) has been collected with the CMD-2 detector at the VEPP-2M collider. A latest analysis of the KS KL coupled decays based on 30 % of available data is presented in this paper. The KS KL pairs from phi meson decays were reconstructed in the drift chamber when both kaons decayed into two charged particles. From a sample of 1423 coupled decays a selection of candidates to the CP violating KL into pi+ pi- decay was performed. CP violating decays were not identified because of the domination of events with a KL regenerating at the Be beam pipe into KS and a background from KL semileptonic decays. The regeneration cross section of 110 MeV/c KL mesons was found to be 53 +- 17 mb in agreement with theoretical expectations. The angular distribution of KS mesons after regeneration and the total cross section of KL for Be have been measured., Comment: 14 pages, 8 figures

Published
1997

112. Erratum to: 'Measurement of φ meson parameters in K0K0 decay mode with CMD-2'

Author

A.A. Polunin, V.A. Sidorov, N.I. Root, G.V. Fedotovich, P.A. Lukin, S.G. Zverev, K.Yu. Mikhailov, Yu.V. Yudin, Yu. M. Shatunov, N. Gabyshev, M. Arpagaus, D.N. Grigoriev, R.R. Akhmetshin, V.S. Okhapkin, Ivan Koop, J. A. Thompson, A.I. Sukhanov, S. Eidelman, L.M. Kurdadze, I.G. Snopkov, P.Yu. Stepanov, A.S. Dvoretsky, T.A. Purlatz, N.M. Ryskulov, A.N. Skrinsky, E. G. Pozdeev, P. Krokovny, A. Bondar, L.M. Barkov, A.I. Shekhtman, V.Sh. Banzarov, B.I. Khazin, S.E. Baru, V.I Ptitzyn, I.B. Logashenko, V. M. Aulchenko, N.S. Bashtovoy, E.V. Anashkin, A. P. Lysenko, A.G. Chertovskikh, A.S. Kuzmin, D.V. Chernyak, B. Shwartz, V.P. Smakhtin, Igor Nesterenko, A.A. Ruban, Evgeny Perevedentsev, E. P. Solodov, A.A. Grebeniuk, and A.G. Shamov

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Meson, Mode (statistics)
Published
2001

113. Preliminary results from the CMD-2 detector

Author

I.G. Snopkov, Yu. M. Shatunov, Ivan Koop, A. P. Lysenko, G.A Aksenov, J. P. Miller, D.H Brown, M.A Shubin, B. L. Roberts, L. A. Leontyev, B.I. Khazin, V. W. Hughes, B.O Baibusinov, Vladimir Smakhtin, A.I. Shekhtman, V.G Zavarzin, A.E. Bondar, S.I. Redin, V.M. Titov, R.R. Akhmetshin, V.S. Okhapkin, N. S. Bashtovoi, W. A. Worstell, V.A. Sidorov, V. E. Fedorenko, A.N. Skrinsky, N.I. Root, I. B. Vasserman, M. Yu. Lelchuk, S.E. Baru, T. A. Purlats, A. B. Nomerotsky, C. H. Yang, Yu.V. Yudin, P.M. Ivanov, J. A. Thompson, Satish Dhawan, G.V. Fedotovitch, N.M. Ryskulov, Evgeny Perevedentsev, L.M. Barkov, E.V. Anashkin, B. Shwartz, Yu.I Merzlyakov, I. V. Zhuravkov, V. M. Aulchenko, P. Cushman, A.V Maksimov, V. S. Banzarov, S.G. Pivovarov, E. P. Solodov, A.A. Grebeniuk, A.S. Kuzmin, D.N. Grigoriev, and S. Eidelman

Subjects
Physics, Particle physics, Luminosity (scattering theory), Electromagnet, Physics::Instrumentation and Detectors, Detector, Particle accelerator, Magnetic detector, Particle detector, law.invention, Nuclear physics, law, Physics::Accelerator Physics, High Energy Physics::Experiment, Center of mass, Collider
Abstract

A new general‐purpose detector CMD‐2 (calorimetric magnetic detector) has started experiments at the upgraded e+e− collider VEPP‐2M (collider for electron‐positron beams) at Novosibirsk. During early runs an integrated luminosity of about 400 inverse nanobarns has been collected in the center of mass energy range 400–1030 MeV.

Published
1992

114. Testing and calibration of the BGO endcap calorimeter with phototriode readout for the CMD-2 detector

Author

R.R. Akhmetshin, I.B. Logashenko, D.N. Grigoriev, V.P. Smakhtin, Vassili Kazanin, and Yu.V. Yudin

Subjects
Physics, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, Preamplifier, Astrophysics::High Energy Astrophysical Phenomena, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, Cosmic ray, Particle detector, Calorimeter, Nuclear physics, Scintillation counter, Calibration, Measuring instrument, Physics::Accelerator Physics, High Energy Physics::Experiment, Instrumentation
Abstract

Testing and calibration of the endcap calorimeter of the CMD-2 detector for the VEPP-2M collider is described. The endcap calorimeter consists of 680 BGO crystals with phototriode readout and works in a 1 T magnetic field. All crystals, phototriodes and preamplifiers were tested before installation. Electronic and cosmic rays calibration are regularly performed. As the calibration by cosmic rays reveals, the average energy equivalent of noise is about 1 MeV, in accordance with the design value. Long term stability of the calorimeter has been studied.

Published
1996

115. Study of the process e+e−→pp¯ in the c.m. energy range from threshold to 2 GeV with the CMD-3 detector

Author

R.R. Akhmetshin, A.N. Amirkhanov, A.V. Anisenkov, V.M. Aulchenko, V.Sh. Banzarov, N.S. Bashtovoy, D.E. Berkaev, A.E. Bondar, A.V. Bragin, S.I. Eidelman, D.A. Epifanov, L.B. Epshteyn, A.L. Erofeev, G.V. Fedotovich, S.E. Gayazov, A.A. Grebenuk, S.S. Gribanov, D.N. Grigoriev, E.M. Gromov, F.V. Ignatov, V.L. Ivanov, S.V. Karpov, A.S. Kasaev, V.F. Kazanin, B.I. Khazin, A.N. Kirpotin, I.A. Koop, O.A. Kovalenko, A.N. Kozyrev, E.A. Kozyrev, P.P. Krokovny, A.E. Kuzmenko, A.S. Kuzmin, I.B. Logashenko, P.A. Lukin, K.Yu. Mikhailov, V.S. Okhapkin, A.V. Otboev, Yu.N. Pestov, S.G. Pivovarov, A.S. Popov, G.P. Razuvaev, A.L. Romanov, A.A. Ruban, N.M. Ryskulov, A.E. Ryzhenenkov, V.E. Shebalin, D.N. Shemyakin, B.A. Shwartz, D.B. Shwartz, A.L. Sibidanov, P.Yu. Shatunov, Yu.M. Shatunov, E.P. Solodov, V.M. Titov, A.A. Talyshev, A.I. Vorobiov, Yu.V. Yudin, and Yu.M. Zharinov

Subjects
lcsh:Physics, lcsh:QC1-999
Abstract

Using a data sample of 7.7 pb−1 collected with the CMD-3 detector at the VEPP-2000 e+e− collider we select about 2900 events of the process e+e−→pp¯ and measure its cross section at 12 energy points with about 6% systematic uncertainty. From the angular distribution of produced nucleons we obtain the ratio GE/GM.

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116. Measurement of e+e−→π+π− cross-section with CMD-2 around ρ-meson

Author

S.V. Karpov, E. A. Kuraev, Igor Nesterenko, I. Logashenko, B.I. Khazin, A.N. Skrinsky, V.A. Sidorov, P.A. Lukin, L.M. Kurdadze, I.G. Snopkov, A.E. Bondar, K.Yu. Mikhailov, N.I. Root, J. P. Miller, V.M. Titov, E. P. Solodov, N.S. Bashtovoy, N. Gabyshev, A. I. Milstein, Yu. M. Shatunov, I. A. Koop, A.A. Ruban, J. A. Thompson, Andrej Arbuzov, E.V. Anashkin, L.M. Barkov, D.V. Bondarev, Yu. Y. Yudin, A.S. Kuzmin, N.M. Ryskulov, V.M. Aulchenko, A.I. Sukhanov, V.P. Smakhtin, B.A. Shwartz, F.V. Ignatov, Vassili Kazanin, P.Yu. Stepanov, S. K. Dhawan, A.S. Popov, D.A. Gorbachev, A.V. Bragin, V. W. Hughes, S.G. Zverev, D.V. Chernyak, A. A. Grebenuk, A.L. Sibidanov, P. Krokovny, T.A. Purlatz, G.V. Fedotovich, A.G. Shamov, R.R. Akhmetshin, A.A. Polunin, D.N. Grigoriev, A. P. Lysenko, V.Sh. Banzarov, V.S. Okhapkin, S.I. Eidelman, S.E. Baru, and B. L. Roberts

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Muon, Meson, Anomalous magnetic dipole moment, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Electron–positron annihilation, Hadron, Form factor (quantum field theory), 01 natural sciences, High Energy Physics - Experiment, law.invention, Nuclear physics, Pion, law, 0103 physical sciences, Physics::Accelerator Physics, High Energy Physics::Experiment, 010306 general physics, Collider
Abstract

The cross section of the process e+e- -> pi+pi- has been measured using about 114000 events collected by the CMD-2 detector at the VEPP-2M e+e- collider in the center-of-mass energy range from 0.61 to 0.96 GeV. Results of the pion form factor determination with a 0.6% systematic uncertainty are presented. Implications for the hadronic contribution to the muon anomalous magnetic moment are discussed., Comment: 17 pages, 4 figures, submitted to PLB

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117. Status of experiments and recent results from CMD-2 detector at VEPP-2M

Author

S.E. Baru, V. W. Hughes, P.M. Ivanov, V.P. Smakhtin, G.V. Fedotovitch, Igor Nesterenko, B.A. Shwartz, D.N. Grigoriev, A.V. Otboev, P. Krokovny, V.S. Okhapkin, A.L. Sibidanov, P.Yu. Stepanov, E. P. Solodov, V.A. Sidorov, D.V. Bondarev, Yu.V. Yudin, E.V. Anashkin, Yu. M. Shatunov, Evgeny Perevedentsev, A.A. Ruban, A.S. Kuzmin, Vassili Kazanin, S.G. Zverev, T.A. Purlatz, B.I. Kha zin, Ivan Koop, A. P. Lysenko, A.A. Polunin, V.M. Titov, A.S. Popov, A. Bondar, L.M. Barkov, A.A. Grebeniuk, A.G. Shamov, V.Sh. Banzarov, N.M. Ryskulov, K.Yu. Mikhailov, A.N. Skrinsky, M. S. Korostelev, A.I. Sukhanov, J. A. Thompson, P.A. Lukin, A.I. Shekhtman, N.I. Root, Alexander Valishev, S.I. Eidelman, N. Gabyshev, I.B. Logashenko, R.R. Akhmetshin, N.S. Bashtovoy, L.M. Kurdadze, I.G. Snopkov, A.V. Bragin, S.V. Karpov, V.M. Aulchenko, and D.V. Chernyak

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Annihilation, Meson, High Energy Physics::Phenomenology, Nuclear Theory, Hadron, Elementary particle, Quarkonium, Particle identification, Nuclear physics, Particle decay, High Energy Physics::Experiment, Nuclear Experiment, Lepton
Abstract

The Cryogenic Magnetic Detector (CMD-2) is shortly described. Preliminary results for the cross sections of e + e − annihilation into hadrons and leptons are presented in the c.m. energy range from 0.37 to 1.39 GeV. The total integrated luminosity of about 26 pb −1 has been collected. The new results for the ϱ and ω meson parameters are reported. The major decay modes of the f meson as well as its rare decays have been observed. The tagged kaons and η mesons in f meson decays were used to look for some decay modes of K S o and η mesons.

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