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58 results on '"R.R. Akhmetshin"'

1. Recent results from the CMD-3 detector

Author

Yu. M. Shatunov, Alexey Talyshev, V.E. Shebalin, V. L. Ivanov, F.V. Ignatov, A. N. Kirpotin, E.A. Kozyrev, A.E. Bondar, A.N. Kozyrev, Sergei V. Karpov, V.Sh. Banzarov, N.M. Ryskulov, P. Yu. Shatunov, A.S. Kuzmin, Yu. A. Rogovsky, D.E. Berkaev, P. Krokovny, A. V. Semenov, S.I. Eidelman, A. V. Otboev, A.S. Popov, Alexey Anisenkov, P.A. Lukin, G.V. Fedotovich, K.Yu. Mikhailov, I. A. Koop, A. I. Senchenko, S.E. Gayazov, D.N. Shemyakin, V.M. Aulchenko, A.A. Ruban, Yu.V. Yudin, D.N. Grigoriev, D. B. Shwartz, I.B. Logashenko, A.L. Sibidanov, L.B. Epshtein, G.P. Razuvaev, N.S. Bashtovoy, A. I. Vorobiov, V.M. Titov, B.A. Shwartz, A.E. Ryzhenenkov, R.R. Akhmetshin, A.N. Amirkhanov, Yu.N. Pestov, A.V. Bragin, A.E. Kuzmenko, A.A. Grebenuk, D.A. Epifanov, Ilya Zemlyansky, S.S. Gribanov, A.L. Erofeev, E. P. Solodov, A.A. Korobov, Vassili Kazanin, and V.S. Okhapkin

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Range (particle radiation), 010308 nuclear & particles physics, Hadron, Detector, 01 natural sciences, law.invention, law, 0103 physical sciences, 010306 general physics, Collider, Energy (signal processing)
Abstract

This paper reports a current status of the measurements of the hadronic cross sections in the c.m. energy range from 0.32 to 2.0 GeV with the CMD-3 detector at the VEPP-2000 electron-positron collider. The overall size of the data, acquired by the CMD-3 in the runs of 2010–2013 and 2017–2018 years, is about 160 pb−1. The results of data analysis for various exclusive modes of e + e − → h a d r o n s are described.

Published
2020

2. Production of four charged pions with the CMD-3 detector at the VEPP-2000 collider

Author

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

Subjects
Physics, Nuclear physics, Pion, law, Detector, Collider, VEPP-2000, law.invention
Published
2020

3. Hadronic cross sections with the CMD-3 detector at the VEPP-2000

Author

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

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Luminosity (scattering theory), 010308 nuclear & particles physics, Electron–positron annihilation, Hadron, Detector, 01 natural sciences, law.invention, law, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, Collider, VEPP-2000
Abstract

This paper reports measurements of the hadronic cross sections with the CMD-3 detector at the VEPP-2000 electron-positron collider. The overall size of the data sample analyzed is about 60 pb-1, collected by the CMD- 3 running since December 2010 up to June 2013 in the c.m. energy range from 0.32 to 2.0 GeV. The preliminary results of data analysis for various modes of e + e − → hadrons are discussed.

Published
2018

4. Charged particle identification with the liquid xenon calorimeter of the CMD-3 detector

Author

S. Eidelman, E. P. Solodov, A. A. Grebenuk, A.N. Kozyrev, Yu.N. Pestov, L.B. Epshteyn, D.N. Grigoriev, A.A. Korobov, A.E. Kuzmenko, Yu.V. Yudin, Alexey Anisenkov, V. L. Ivanov, N.M. Ryskulov, A.L. Erofeev, P.A. Lukin, Vassili Kazanin, A.N. Amirkhanov, D.N. Shemyakin, D.A. Epifanov, G.P. Razuvaev, V. M. Aulchenko, S.S. Tolmachev, Alexei Talyshev, P. Krokovny, S.E. Gayazov, S.S. Gribanov, A.S. Popov, A.V. Semenov, A. A. Uskov, E.A. Kozyrev, V.S. Okhapkin, A.S. Kuzmin, K.Yu. Mikhailov, F.V. Ignatov, Sergei V. Karpov, A.E. Bondar, A.V. Bragin, I.B. Logashenko, A. I. Vorobiov, A.E. Ryzhenenkov, B. Shwartz, V.E. Shebalin, A.A. Ruban, G.V. Fedotovich, V.M. Titov, N.S. Bashtovoy, and R.R. Akhmetshin

Subjects
Physics, Nuclear and High Energy Physics, Range (particle radiation), Muon, Calorimeter (particle physics), Physics::Instrumentation and Detectors, chemistry.chemical_element, Particle identification, Charged particle, law.invention, Nuclear physics, Xenon, Pion, chemistry, law, High Energy Physics::Experiment, Collider, Instrumentation
Abstract

The paper describes a method of the charged particle identification, developed for the CMD-3 detector, installed at the VEPP-2000 e + e − collider. The method is based on application of boosted decision trees classifiers, trained for the optimal separation of electrons, muons , pions and kaons in the momentum range from 100 to 1200 MeV / c . The input variables for the classifiers are linear combinations of the energy depositions of charged particles in 12 layers of the liquid xenon calorimeter of the CMD-3. The event samples for training of the classifiers are taken from the simulation. Various issues of the calorimeter strip channels response simulation and their calibration are considered. Application of the method is illustrated by the examples of separation of the e + e − ( γ ) and π + π − ( γ ) final states and of selection of the K + K − final state at high energies.

Published
2021

5. Study of the process e + e − → π + π − π 0 η in the c.m. energy range 1394–2005 MeV with the CMD-3 detector

Author

L.B. Epshteyn, A.E. Bondar, S. Eidelman, A.N. Kozyrev, Yu. A. Rogovsky, I.B. Logashenko, A.A. Ruban, G.P. Razuvaev, A. V. Otboev, Alexey Anisenkov, A.S. Kuzmin, A.S. Popov, Alexei Talyshev, A.L. Erofeev, D.N. Grigoriev, V. L. Ivanov, A. N. Kirpotin, R.R. Akhmetshin, B. Shwartz, E.A. Kozyrev, D.A. Epifanov, K.Yu. Mikhailov, F.V. Ignatov, Yu. M. Shatunov, A.E. Ryzhenenkov, V.S. Okhapkin, P. Krokovny, Ivan Koop, D. E. Berkaev, A.A. Korobov, V. M. Aulchenko, A.V. Bragin, Vassili Kazanin, N.S. Bashtovoy, D. B. Shwartz, V.M. Titov, V.E. Shebalin, P. Yu. Shatunov, A. I. Vorobiov, G.V. Fedotovich, P.A. Lukin, Yu.V. Yudin, A. I. Senchenko, S.E. Gayazov, S.S. Gribanov, D.N. Shemyakin, V.Sh. Banzarov, A.N. Amirkhanov, A.L. Sibidanov, N.M. Ryskulov, Sergei V. Karpov, E. P. Solodov, A. A. Grebenuk, Yu.N. Pestov, A.E. Kuzmenko, and Ilya Zemlyansky

Subjects
Physics, Nuclear and High Energy Physics, Range (particle radiation), 010308 nuclear & particles physics, Electron–positron annihilation, Detector, Analytical chemistry, 01 natural sciences, lcsh:QC1-999, Lower energy, High Energy Physics - Experiment, law.invention, law, 0103 physical sciences, Pi, Intermediate state, High Energy Physics::Experiment, 010306 general physics, Collider, lcsh:Physics, Energy (signal processing)
Abstract

The cross section of the process $e^+e^- \to \pi^+\pi^-\pi^0\eta$ has been measured using a data sample of 21.8 pb$^{-1}$ collected with the CMD-3 detector at the VEPP-2000 $e^+e^-$ collider. 2769$\pm$95 signal events have been selected in the center-of-mass energy range 1394--2005 MeV. The production dynamics is dominated by the $\omega(782)\eta$ and $\phi(1020)\eta$ intermediate states in the lower energy range, and by the $a_0(980)\rho(770)$ intermediate state at higher energies., Comment: 20 pages, 11 figures, 2 tables

Published
2017

6. Cross sections of hadronic reactions e + e − → K + K − nπ (n =1,2,3) measured with the CMD3 detector at the VEPP-2000 electron–positron collider

Author

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

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Luminosity (scattering theory), 010308 nuclear & particles physics, Hadron, Detector, Electron, 01 natural sciences, law.invention, Nuclear physics, Positron, law, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Collider, VEPP-2000
Abstract

We analyze the data on e + e − collisions at c.m.s. energies between 0.32 and 2 GeV collected in 2011–2013 with the CMD3 detector operating at the VEPP-3 e + e − collider of the Budker Institute of Nuclear Physics. The data correspond to an integrated luminosity of nearly 60 pb-1. Preliminary results e + e − → K + K − nπ (n = 1, 2, 3) on the reactions with two charged kaons in the final state are presented, and the procedure for estimating the integrated luminosity for each energy setting is described.

Published
2017

7. Study of the processes e+e-→ K+K− + nπ (n = 1,2,3) with the CMD-3 detector at the VEPP-2000 electron-positron collider

Author

Yu. M. Shatunov, E. P. Solodov, A.N. Kozyrev, A.A. Korobov, D.N. Grigoriev, Alexey Talyshev, E.A. Kozyrev, Alexey Anisenkov, V.E. Shebalin, A.I. Vorobiov, V. L. Ivanov, Vassili Kazanin, Yu. A. Rogovsky, N.S. Bashtovoy, Fedor Ignatov, D. B. Shwartz, A.L. Sibidanov, A. P. Lysenko, I.B. Logashenko, A.S. Popov, P.A. Lukin, A.A. Grebenuk, S.I. Eidelman, A.E. Bondar, K.Yu. Mikhailov, Yu.N. Pestov, G.P. Razuvaev, I. A. Koop, P. Krokovny, N.M. Ryskulov, D.A. Epifanov, S.V. Karpov, R.R. Akhmetshin, B.A. Shwartz, V.S. Okhapkin, A.E. Ryzhenenkov, V.M. Aulchenko, D.E. Berkaev, A.S. Kuzmin, A.N. Amirkhanov, E.A. Perevedentsev, Yu.V. Yudin, G.V. Fedotovich, A.S. Kasaev, S.S. Gribanov, A.L. Erofeev, Ilya Zemlyansky, A.V. Bragin, L.B. Epshteyn, V. S. Banzarov, S.E. Gayazov, A.A. Ruban, A.E. Kuzmenko, and D.N. Shemyakin

Subjects
Physics, Luminosity (scattering theory), 010308 nuclear & particles physics, QC1-999, Detector, Electron, 01 natural sciences, law.invention, Nuclear physics, Positron, law, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, Collider, VEPP-2000, Energy (signal processing)
Abstract

The data sample collected in 2011-2013 at the c.m.s. energies between 0.32-2 GeV with the CMD-3 detector operating at the VEPP-2000 e+e− collider is analzed. The collected data corresponds to an integrated luminosity about ∼ 60pb−1. The techniques for determination of the integrated luminosity for each energy setting is described. Some preliminary results of the study of the processes e+e−→ K+ K− + nπ (n = 1,2,3) with two charged kaons in the final state are presented. These processes have several intermediate states, which are important to correctly descript the angular distributions of final particles and the cross sections dependence on the energy.

Published
2019

8. Study of π+π−π+π− production with CMD-3 detector at the VEPP-2000 collider

Author

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

Subjects
Physics, Range (particle radiation), Luminosity (scattering theory), Muon, Anomalous magnetic dipole moment, QC1-999, Hadron, Electron, 01 natural sciences, 010305 fluids & plasmas, law.invention, Nuclear physics, law, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, Collider, VEPP-2000
Abstract

The cross section of the process e+e−→ π+π−π+π− has been measured using an integrated luminosity of 17 pb−1 collected with the CMD-3 detector in the center-of-mass energy range 650-1000 MeV. High-precision measurements of various hadronic cross sections are of great interest in relation with the problem of the muon anomalous magnetic moment g-2. This measurement can be also used to test the relation between the cross section of e+e−→ π+ π−π+ π− and the spectral function for the τ−→ π−π0π0π0 decay predicted by the conservation of vector current (CVC).

Published
2019

9. Recent results of the hadronic cross section measurements with the CMD-3 detector at e+e− collider VEPP-2000

Author

D.E. Berkaev, S. S. Gribanov, A. N. Kirpotin, A. V. Otboev, Fedor Ignatov, D.N. Shemyakin, S.V. Karpov, E. P. Solodov, A. N. Amirkhanov, A.N. Kozyrev, I.B. Logashenko, A.S. Popov, D. B. Shwartz, A.L. Sibidanov, A. A. Korobov, Vassili Kazanin, Alexey Talyshev, A. I. Stnchenko, A.A. Grebenuk, K.Yu. Mikhailov, S. S. Tolmachev, E.A. Kozyrev, P. Krokovny, P. Yu. Shatunov, A.V. Bragin, A.L. Erofeev, L.B. Epshteyn, A.E. Kuzmenko, Alexey Anisenkov, N.S. Bashtovoy, Yu. M. Shatunov, D. Epifanov, A.S. Kuzmin, N.M. Ryskulov, V.E. Shebalin, A.I. Vorobiov, V. L. Ivanov, S.E. Gayazov, B.A. Shwartz, G.V. Fedotovich, V.S. Okhapkin, A.E. Ryzhenenkov, A.E. Bondar, A.A. Ruban, R.R. Akhmetshin, I. A. Koop, Ilya Zemlyansky, Yu. N. Peatov, V. S. Banzarov, Yu.V. Yudin, G.P. Razuvaev, V.M. Titov, P.A. Lukin, S.I. Eidelman, and D.N. Grigoriev

Subjects
Physics, Luminosity (scattering theory), Meson, 010308 nuclear & particles physics, QC1-999, Hadron, Detector, Nuclear Theory, Form factor (quantum field theory), Dalitz plot, 01 natural sciences, law.invention, Nuclear physics, law, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, Collider, Nuclear Experiment, VEPP-2000
Abstract

A brief review of the recent results on the hadronic cross section measurements with the CMD-3 detector at the e+e− collider VEPP-2000 is given. Focus is made on the processes with charged kaons in multihadron events, which have a strong impact on strange meson spectroscopy and form factors that are important ingredients in the Dalitz plot analysis. Experimental data relevant to the topic are presented from the broad energy range covered by VEPP-2000 and compared to earlier measurements by the different collaborations. The analysis is based on the integrated luminosity of about 100 pb−1 collected in 2011, 2012 and 2017.

Published
2019

10. Study of e+e− annihilation to hadrons at the VEPP-2000 collider

Author

Alexey Talyshev, S. I. Serednyakov, A.L. Sibidanov, E.A. Kozyrev, S.V. Koshuba, S.I. Eidelman, F.V. Ignatov, B.A. Shwartz, L. V. Kardapoltsev, K.V. Pugachev, Yu.N. Pestov, A.E. Ryzhenenkov, R.R. Akhmetshin, M. N. Achasov, V. P. Druzhinin, D.N. Grigoriev, V. V. Zhulanov, V.N. Zhabin, G.P. Razuvaev, A.S. Kupich, N. A. Melnikova, N.M. Ryskulov, Aleksandr Korol, R.A. Litvinov, I.B. Logashenko, I. K. Surin, A. E. Obrazovsky, P. Krokovny, A.N. Amirkhanov, A.Yu. Barnyakov, A.S. Popov, S.V. Karpov, Alexander Bogdanchikov, A.E. Bondar, K.A. Martin, V.S. Okhapkin, A.S. Kuzmin, Yu.V. Yudin, K.Yu. Mikhailov, D.A. Epifanov, E. V. Pakhtusova, Konstantin Beloborodov, Alexey Anisenkov, S.E. Gayazov, A.V. Bragin, A.A. Ruban, V.M. Aulchenko, E. P. Solodov, A.N. Kozyrev, A.A. Korobov, D. A. Shtol, A.E. Kuzmenko, Z. K. Silagadze, Vassili Kazanin, V.M. Titov, S.S. Gribanov, A.L. Erofeev, T. V. Dimova, L.B. Epshteyn, D.N. Shemyakin, A. V. Berdyugin, N.S. Bashtovoy, G.V. Fedotovich, Alexey Kharlamov, A.A. Grebenuk, V.Sh. Banzarov, A. A. Botov, D.P. Kovrizhin, A.V. Vasiljev, P.A. Lukin, L.A. Korneev, Y. Usov, V.E. Shebalin, A.I. Vorobiov, V.G. Golubev, and V. L. Ivanov

Subjects
Physics, Annihilation, 010308 nuclear & particles physics, Electron–positron annihilation, QC1-999, Hadron, 01 natural sciences, law.invention, Nuclear physics, law, 0103 physical sciences, 010306 general physics, Collider, VEPP-2000
Abstract

We present current status of the SND and CMD-3 experiments at the VEPP-2000 e+e− collider and recent result of data analysis on the processes $e^+e^-\rightarrow\pi^+\pi^-,n\overline n,\pi^+\pi^-\eta,\pi^+\pi^-\pi^0\eta,K_SK_L\pi^0$, etc.

Published
2019

11. CMD-3 Overview

Author

N.M. Ryskulov, Alexey Talyshev, P.A. Lukin, P. Yu. Shatunov, A.E. Bondar, E.A. Kozyrev, V. S. Banzarov, A.A. Grebenuk, P. Krokovny, A. N. Kirpotin, S.E. Gayazov, D.N. Shemyakin, A.A. Ruban, Ilya Zemlyansky, G.V. Fedotovich, A.E. Kuzmenko, E. P. Solodov, A.S. Kuzmin, V.E. Shebalin, A.I. Vorobiov, V. L. Ivanov, D.N. Grigoriev, A.N. Kozyrev, A.A. Korobov, A.N. Amirkhanov, I.B. Logashenko, S.S. Gribanov, A.L. Erofeev, V.M. Aulchenko, A.S. Popov, D.A. Epifanov, G.P. Razuvaev, D. B. Shwartz, A.L. Sibidanov, A.V. Bragin, Vassili Kazanin, B.A. Shwartz, Yu.V. Yudin, Alexey Anisenkov, A.E. Ryzhenenkov, K.Yu. Mikhailov, Yu.N. Pestov, Fedor Ignatov, N.S. Bashtovoy, S.I. Eidelman, A. V. Otboev, S.V. Karpov, Yu. M. Shatunov, V.S. Okhapkin, A. I. Senchenko, Ivan Koop, R.R. Akhmetshin, L.B. Epshteyn, and D.E. Berkaev

Subjects
Physics, Range (particle radiation), Muon, 010308 nuclear & particles physics, Physics::Instrumentation and Detectors, QC1-999, Detector, Hadron, 01 natural sciences, law.invention, Calorimeter, Nuclear physics, Upgrade, law, 0103 physical sciences, Physics::Accelerator Physics, High Energy Physics::Experiment, 010306 general physics, Collider, Nuclear Experiment, Energy (signal processing)
Abstract

The CMD-3 detector is installed at the VEPP-2000 e+e− collider at BINP (Novosibirsk, Russia). It is a general-purpose detector, equipped with a tracking system, two crystal (CSI and BGO) calorimeters, liquid Xe calorimeter, TOF and muon systems. The main goal of experiments at CMD-3 is a study of exclusive modes of e+e−→ hadrons at energies $ \sqrt s \le $ GeV. In particular, these results provide an important input for calculation of the hadronic contribution to the muon anomalous magnetic moment. The first round of data taking was performed in 2011–2013, when about 60 1/pb were taken in the center-of-mass (c.m.) energy range from 0.32 to 2.0 GeV. Here we present a survey of results of data analysis. Between 2013 and 2016 the collider and the detector were upgraded. The data taking resumed by the end of 2016. In the first run after the upgrade about 50 1/pb were collected at the energy range between 1.28 and 2.007 GeV. We discuss the upgrade and the first preliminary results from the new data.

Published
2019

12. Study of the process e+e−→ K+K−π0 in the center-of-mass energy range 1.2–2 GeV with the CMD-3 detector

Author

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

Subjects
Physics, Nuclear physics, Range (particle radiation), law, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Electron–positron annihilation, QC1-999, Detector, Center of mass, Collider, Energy (signal processing), law.invention
Abstract

The process e+ e−→ K+ K−π0 has been studied in the center-of-mass energy range from 1.2 to 2 GeV using a 80.6 pb−1 data sample collected with the CMD-3 detector at the electron-positron collider VEPP-2000. Preliminary results of the cross-section measurement are presented.

Published
2019

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

Author

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

Subjects
Physics, Systematic error, Nuclear and High Energy Physics, Range (particle radiation), 010308 nuclear & particles physics, Electron–positron annihilation, Detector, 01 natural sciences, law.invention, Nuclear physics, Angular distribution, law, 0103 physical sciences, 010306 general physics, Nucleon, Collider, Energy (signal processing)
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 − → p p ¯ 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 G E / G M .

Published
2016

14. Preliminary results of the cross-section measurement of e+e− → φ(1020)η process with the CMD-3 detector at VEPP-2000 collider

Author

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

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Range (particle radiation), Luminosity (scattering theory), 010308 nuclear & particles physics, Electron–positron annihilation, Detector, 01 natural sciences, Atomic and Molecular Physics, and Optics, law.invention, Nuclear physics, Cross section (physics), law, 0103 physical sciences, 010306 general physics, Collider, VEPP-2000, Energy (signal processing)
Abstract

We report preliminary results on the cross section of the process e+e− → φ(1020)η measured at 30 center-of-mass energy points in the range from 1.59 up to 2.0 GeV. Data analysis is based on the integrated luminosity of 22 pb−1 collected with the CMD-3 detector in 2011–2012. The obtained cross section agrees with the BaBar measurement and has better statistical accuracy.

Published
2016

15. Measurement of the hadronic cross sections with the CMD-3 and SND detectors at the VEPP-2000 collider

Author

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

Subjects
Physics, Muon, Luminosity (scattering theory), 010308 nuclear & particles physics, Physics::Instrumentation and Detectors, QC1-999, Hadron, Detector, 01 natural sciences, law.invention, Nuclear physics, Upgrade, law, 0103 physical sciences, Physics::Accelerator Physics, High Energy Physics::Experiment, 010306 general physics, Collider, VEPP-2000, Beam energy
Abstract

Since December 2010 the CMD-3 and SND detectors detectors collect data at the VEPP-2000 electron-positron collider. In 2013-2015 the injection facility of the collider has undergone an upgrade of the injection system. The new BINP injection complex has been connected to the VEPP-2000 collider, so the restrictions connected to the lack of positrons and limited beam energy transfer do not apply any more. The collider luminosity in whole energy range is restricted now only by beam-beam effects. VEPP-2000 collider started to collect data with two detectors at 2016 year. The collected data sample since 2010 corresponds more than 100 pb-1 of integrated luminosity per detector in the c.m. energy between 0.32 and 2GeV. We will report here results of analysis of various hadronic cross sections from detectors both published and preliminary. These measurements are important by themselves and also because of the implications for anomaly of the magnetic moment of a muon (g-2) discrepancy.

Published
2018

16. Investigation of the processes e + e − → 2 (π+π−π0) and e + e − → 3 (π+π−) with the aid of the CMD-3 detector

Author

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

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Luminosity (scattering theory), law, Detector, Atomic physics, Collider, Atomic and Molecular Physics, and Optics, law.invention
Abstract

The cross sections for the processes e + e − → 2(π+π−π0) and e + e − → 3(π+π−) at c.m. energies in the range of 1.5–2 GeV were measured with the aid of the CMD-3 detector at the VEPP-2000 collider of the Budker Institute of Nuclear Physics (Novosibirsk, Siberian Branch, Russian Academy of Sciences). The integrated luminosity in the respective experiment was 22 pb−1.

Published
2015

17. Calorimetry of the CMD-3 detector

Author

K.Yu. Mikhailov, Alexey Talyshev, D.N. Grigoriev, D. A. Epifanov, A.S. Kuzmin, N.S. Bashtovoy, V.E. Shebalin, A.A. Ruban, A.N. Kozyrev, G.P. Razuvaev, A.L. Erofeev, R.R. Akhmetshin, Alexey Anisenkov, O.A. Kovalenko, V.M. Titov, I.B. Logashenko, L.B. Epshteyn, B.A. Shwartz, V.M. Aulchenko, Yu.V. Yudin, F.V. Ignatov, A.E. Kuzmenko, A.A. Grebenuk, Vassili Kazanin, and V.S. Okhapkin

Subjects
Physics, Nuclear and High Energy Physics, Annihilation, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Detector, chemistry.chemical_element, Calorimetry, 01 natural sciences, Calorimeter, law.invention, Nuclear physics, Xenon, chemistry, law, 0103 physical sciences, Calibration, Physics::Accelerator Physics, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Collider, Instrumentation, Beam (structure)
Abstract

CMD-3 is a general purpose detector designed to study e + e − annihilation into hadrons. It is mounted at VEPP-2000 collider which operates in the wide energy range, E c . m . s = 0.32 − 2 GeV . The calorimetry at the detector is based on three subsystems: closest to the beam pipe barrel Liquid Xenon calorimeter, outer barrel calorimeter based on CsI scintillation crystals and the endcap calorimeter made of BGO scintillation crystals. We describe the structure of the calorimeters, their electronics and the energy calibration procedures.

Published
2016

18. Study of the e+e- -> hadrons reactions with CMD-3 detector at VEPP-2000 collider

Author

Ilya Zemlyansky, Alexey Anisenkov, E.Shebalin, A.S. Kuzmin, N.M. Ryskulov, S.E. Gayazov, S.S. Gribanov, I.B. Logashenko, D.A. Epifanov, A.V. Bragin, K Y.Mikhailov, D.N. Grigoriev, A.S. Popov, F.Kazanin, A.L. Sibidanov, P. Yu. Shatunov, A.N. Amirkhanov, D. E. Berkaev, A.A. Korobov, L.Ivanov, Yu.V. Yudin, Evgeniy Solodov, P.A. Lukin, G.V. Fedotovich, A. V. Otboev, A.A. Ruban, P. Krokovny, S. Eidelman, A.N. Kozyrev, A. N. Kirpotin, A.E. Ryzhenenkov, A.E. Bondar, S.Okhapkin, Yu. M. Shatunov, A. I. Senchenko, R.R. Akhmetshin, A. A. Grebenuk, D.N. Shemyakin, Yu.N. Pestov, G.P. Razuvaev, M.Aulchenko, L.B. Epshteyn, A.E. Kuzmenko, Ivan Koop, Alexei Talyshev, N.S. Bashtovoy, E.A. Kozyrev, Sergei V. Karpov, S.Banzarov, F.V. Ignatov, A.L. Erofeev, B. Shwartz, D. B. Shwartz, and A. I. Vorobiov

Subjects
Physics, Muon, Luminosity (scattering theory), Anomalous magnetic dipole moment, Electron–positron annihilation, Hadron, law.invention, Nuclear physics, Pion, law, High Energy Physics::Experiment, Nuclear Experiment, Collider, VEPP-2000
Abstract

The CMD-3 detector is taking data at the VEPP-2000 $e^+e^-$ collider (Budker INP, Novosibirsk, Russia). The main goal of experiments with CMD-3 is the measurement of the cross-sections and dynamics of the exclusive modes of $e^+e^- \to hadrons$ reactions. In particular, these results provide important input for calculation of the hadronic contribution to the muon anomalous magnetic moment. First round of data taking with the CMD-3 detector was performed in 2011-2013 with about 60 1/pb integrated luminosity in the energy range from 0.32 to 2.0 GeV in center-of-mass. Amount of collected data exceeds all previous experiments. Here we present the survey of results of data taken in 2011-2013, including precise measurement of $e^+e^-\to \pi^+\pi^-$ reaction, as well as other hadron final states with up to 6 pions or states include 2 kaons. At the end of 2016 the VEPP-2000 collider resumed operations after upgrade of the injection system, and performance approaching to the project luminosity of $10^{32}\ cm^{-2}s^{-1}$ at 2 GeV has been demonstrated. First preliminary results of new 2017 run are also presented.

Published
2017

19. Preliminary results on CMD-3 measurement of e+e−→ π+π− cross section

Author

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

Subjects
Physics, Range (particle radiation), Luminosity (scattering theory), 010308 nuclear & particles physics, QC1-999, Detector, 01 natural sciences, law.invention, Nuclear physics, Cross section (physics), law, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, 0103 physical sciences, 010306 general physics, Collider
Abstract

The CMD-3 detector has been successfully collecting data at the electron-positron collider VEPP-2000 since December 2010. The first scan below 1 GeV for a π+π− measurement was performed in 2013. The collected data sample corresponds to about 18 pb−1 of integrated luminosity in this energy range. Analysis of the e+e−→ π+π− cross section is in progress. Status of this measurement are presented.

Published
2019

20. Current status of luminosity measurement with the CMD-3 detector at the VEPP-2000 collider

Author

Alexey Talyshev, P. Yu. Shatunov, E.A. Kozyrev, G.P. Razuvaev, N.M. Ryskulov, E. P. Solodov, D.A. Epifanov, D.N. Grigoriev, S.E. Gayazov, G.V. Fedotovich, A.S. Popov, Fedor Ignatov, A.A. Ruban, A.A. Korobov, Vassili Kazanin, K.Yu. Mikhailov, D.N. Shemyakin, P.A. Lukin, A.I. Vorobiov, Yu. M. Shatunov, P. Krokovny, A.S. Kuzmin, E.A. Perevedentsev, V.S. Okhapkin, S.S. Gribanov, A.L. Erofeev, S.I. Eidelman, A. V. Otboev, Yu.N. Pestov, A.E. Kuzmenko, S.V. Karpov, V.E. Shebalin, V. L. Ivanov, N.S. Bashtovoy, I. A. Koop, A.N. Amirkhanov, V.Sh. Banzarov, I.B. Logashenko, D.E. Berkaev, L.B. Epshteyn, B.A. Shwartz, A.E. Ryzhenenkov, R.R. Akhmetshin, Yu.V. Yudin, Alexey Anisenkov, A.V. Bragin, A.E. Bondar, S. S. Tolmachev, A.A. Grebenuk, V.M. Aulchenko, A.N. Kozyrev, D. B. Shwartz, and A.L. Sibidanov

Subjects
Physics, Range (particle radiation), Photon, Luminosity (scattering theory), 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, QC1-999, Detector, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, law.invention, Nuclear physics, law, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, Collider, VEPP-2000, Astrophysics::Galaxy Astrophysics, Energy (signal processing)
Abstract

The CMD-3 detector started data taking at the electron-positron collider VEPP-2000 [1] in December 2010. The collected data sample corresponds to an integrated luminosity of 87 pb−1 in the c.m. energy range from 1.06 up to 2 GeV and 91 pb−1 from 0.32 to 1.06 GeV. The integrated luminosity was measured by counting e+e−→ e+e− and e+e−→ γγ events, allowing additional photons in the final state. Preliminary results of the luminosity measurement are presented for various energy ranges and its accuracy is estimated to be 1%.

Published
2019

21. Recent results from CMD-3

Author

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

Subjects
Physics, Particle physics, Luminosity (scattering theory), 010308 nuclear & particles physics, QC1-999, Electron–positron annihilation, Detector, 01 natural sciences, law.invention, law, 0103 physical sciences, Range (statistics), 010306 general physics, Collider
Abstract

Regular data taking with the CMD-3 at the electron-positron collider VEPP-2000 is under way since 2010. The collected data sample corresponds to about 200 inverse picobarns of integrated luminosity per detector in the energy range from 0.32 up to 2 GeV, with a goal to collect about 1 fb−1 during next five years. Some of the recent results from the CMD-3 detector are discussed.

Published
2019

22. Study of the e+e−→ KS KLπ0 process up to 2 GeV with the CMD-3 detector at the VEPP-2000 collider

Author

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

Subjects
Physics, Physics::Instrumentation and Detectors, QC1-999, Electron–positron annihilation, Detector, law.invention, Nuclear physics, Cross section (physics), law, Physics::Accelerator Physics, High Energy Physics::Experiment, Collider, VEPP-2000
Abstract

The cross section of the process e+ e−→ KS KL π0 has been studied with the CMD-3 detector at the VEPP-2000 electron-positron collider in the center-of-mass energy range from 1.1 to 2 GeV. Preliminary results on the total cross section of the process are presented.

Published
2019

23. An amplitude analysis of the process e+e-→ 4π in the center-of-mass energy range 900–2000 MeV with the CMD3 detector at the VEPP-2000 e+e- collider

Author

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

Subjects
Physics, Range (particle radiation), 010308 nuclear & particles physics, QC1-999, Detector, 01 natural sciences, law.invention, Nuclear physics, Amplitude, law, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, 0103 physical sciences, Physics::Accelerator Physics, High Energy Physics::Experiment, Center of mass, 010306 general physics, Collider, VEPP-2000, Energy (signal processing)
Abstract

A large data sample of e+e-→ 4π collected by the CMD-3 experiment at the VEPP-2000 e+ e− collider allowed for an amplitude analysis of the process e+e−→ 4π in the center-of-mass energy range 900–2000 MeV. Various intermediate components were distinguished and dominance of the ωπ0 and a1π amplitudes has been proved.

Published
2019

24. Study of the process e+e−→3(π+π−) in the c.m. energy range 1.5–2.0 GeV with the CMD-3 detector

Author

E.A. Perevedentsev, A.S. Kasaev, V.Sh. Banzarov, S.S. Gribanov, A.N. Amirkhanov, A.L. Erofeev, P.A. Lukin, S.V. Karpov, Yu.V. Yudin, I.B. Logashenko, D. Epifanov, A.E. Bondar, A.S. Kuzmin, G.P. Razuvaev, A. V. Semenov, F.V. Ignatov, E. P. Solodov, D.N. Shemyakin, A.A. Korobov, S.I. Eidelman, Ilya Zemlyansky, Alexey Talyshev, V.M. Aulchenko, M.V. Timoshenko, D.E. Berkaev, E.A. Kozyrev, Vassili Kazanin, A.A. Grebenuk, Alexey Anisenkov, A.N. Kozyrev, L.B. Epshteyn, D. B. Shwartz, P. Krokovny, A.L. Sibidanov, B.A. Shwartz, A.E. Ryzhenenkov, A.V. Bragin, R.R. Akhmetshin, V.S. Okhapkin, D.N. Grigoriev, F. Grancagnolo, A. P. Lysenko, I. A. Koop, N.S. Bashtovoy, V.M. Titov, G.V. Fedotovich, V.E. Shebalin, A.I. Vorobiov, V. L. Ivanov, A.S. Popov, K.Yu. Mikhailov, Yu. M. Shatunov, S.E. Gayazov, A.A. Ruban, A.E. Kuzmenko, Yu.N. Pestov, and N.M. Ryskulov

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Range (particle radiation), law, Electron–positron annihilation, Detector, Intermediate state, Atomic physics, Collider, Energy (signal processing), law.invention
Abstract

The cross section of the process e + e − → 3 ( π + π − ) π 0 has been measured for the first time using a data sample of 56.7 pb−1 collected with the CMD-3 detector at the VEPP-2000 e + e − collider. 632±32 signal events have been selected in the center-of-mass energy range 1.6–2.0 GeV. A study of dynamics of seven-pion production allows one to extract contributions of the dominated 2 ( π + π − ) ω and 2 ( π + π − ) η intermediate states.

Published
2013

25. Upgrade of the CMD-3 BGO Endcap Calorimeter

Author

Vassili Kazanin, D.N. Grigoriev, R.R. Akhmetshin, Yu.V. Yudin, and A.E. Kuzmenko

Subjects
Physics, Nuclear and High Energy Physics, Calorimeter (particle physics), Physics::Instrumentation and Detectors, business.industry, Detector, Capacitance, Photodiode, law.invention, Upgrade, Nuclear Energy and Engineering, law, Nuclear electronics, Optoelectronics, High Energy Physics::Experiment, Electronics, Electrical and Electronic Engineering, business, Collider
Abstract

The BGO endcap calorimeter was successfully operated in the CMD-2 detector at the VEPP-2M collider. It consists of 680 BGO crystals each with a size of 25×25×150 mm3, arranged in two identical endcaps, with a total crystal weight of 450 kg. The light readout used vacuum phototriodes. The endcap calorimeter has now been upgraded to work in the CMD-3 detector at new collider VEPP-2000. The major part of the endcap calorimeter, the BGO crystals, remains the same. The main upgrade is the use of silicon PIN photodiodes and new electronics. Main reason to change photosensitive device is the strong non-uniform magnetic field in the endcap calorimeter volume so the vacuum photosensitive devices cannot operate in such magnetic fields. Also the available space for the endcap calorimeter space had to be reduced. The Hamamatsu PIN photodiode S3590-08 was chosen as the optimal solution, as they are insensitive to magnetic fields and are both compact and stable. An order of magnitude larger capacitance of silicon photodiodes requires design and produce new custom electronics. The upgrade is expected to bring an overall improvement of parameters. The endcap calorimeter has been installed in the detector and participates in data taking which started at 2010. The preliminary data analysis shows an improvement of the energy resolution compare to the CMD-2 detector.

Published
2013

26. Overview of the CMD-3 recent results at e+e− collider VEPP-2000

Author

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

Subjects
Physics, Annihilation, Luminosity (scattering theory), 010308 nuclear & particles physics, QC1-999, Hadron, Detector, 01 natural sciences, law.invention, Nuclear physics, law, 0103 physical sciences, Invariant mass, High Energy Physics::Experiment, 010306 general physics, Collider, VEPP-2000, Energy (signal processing)
Abstract

Since December 2010, the CMD-3 detector has collected data at the electronpositron collider VEPP-2000. The sample of the accumulated data corresponds to about 60 pb −1 of integrated luminosity in the c.m. energy from 0.32 up to 2 GeV. Preliminary results of the analysis of various processes e + e − annihilation to hadrons are presented. It is shown the processes with multihadron events have several intermediate states which must be taken into account to correctly describe the angular and invariant mass distributions as well as cross section dependence versus energy.

Published
2016

27. Cross section measurement of the process e+e− → K+K−π+π− at the VEPP 2000 collider with the CMD-3 detector

Author

N.S. Bashtovoy, E.A. Kozyrev, A.E. Bondar, L.B. Epshteyn, V.S. Okhapkin, V.Sh. Banzarov, A.S. Popov, E. P. Solodov, A.A. Korobov, G.P. Razuvaev, A. A. Grebenuk, R.R. Akhmetshin, S.E. Gayazov, A.E. Ryzhenenkov, Vassili Kazanin, F.V. Ignatov, K.Yu. Mikhailov, Yu. M. Shatunov, Alexey Anisenkov, P.A. Lukin, S.S. Gribanov, A.A. Ruban, Ivan Koop, Alexei Talyshev, Sergei V. Karpov, D.N. Shemyakin, A.L. Erofeev, B. Shwartz, I.B. Logashenko, A.V. Bragin, D. B. Shwartz, S. Eidelman, A.N. Amirkhanov, A.N. Kozyrev, A.L. Sibidanov, D.A. Epifanov, Yu. A. Rogovsky, Yu.V. Yudin, Evgeny Perevedentsev, A. I. Vorobiov, G.V. Fedotovich, V. L. Ivanov, Ilya Zemlyansky, N.M. Ryskulov, V. M. Aulchenko, V.M. Titov, A.S. Kuzmin, D.N. Grigoriev, O.A. Kovalenko, Yu.N. Pestov, A.E. Kuzmenko, V.E. Shebalin, A. P. Lysenko, and P. Krokovny

Subjects
Physics, Range (particle radiation), Particle physics, Annihilation, Luminosity (scattering theory), Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Detector, Hadron, Electron, law.invention, Nuclear physics, law, High Energy Physics::Experiment, Collider, VEPP-2000
Abstract

Experiments with the CMD-3 detector at the electron-positron collider VEPP-2000 started in 2010. CMD-3 is a general purpose detector designed to study e+e− annihilation into hadrons in the center-of-mass (c.m.) energy range from 0.3 up to2 GeV. The cross section of the process e+e− → K+ K−π+π− has been measured using 23 pb−1 of integrated luminosity collected in the c.m. energy range 1.5 – 2.0 GeV.

Published
2016

28. First results from the CMD-3 Detector at the VEPP-2000 Collider

Author

N.M. Ryskulov, D.E. Berkaev, Yu.V. Yudin, S.A. Ahokhin, D.N. Grigoriev, A. P. Lysenko, Alexey Talyshev, A.V. Bragin, A.S. Popov, A.S. Kuzmin, E.A. Perevedentsev, Semen Eidelman, D.B. Shwartz, S. Pirogov, K.Yu. Mikhailov, A.E. Bondar, S.E. Gayazov, P. Yu. Shatunov, B.A. Shwartz, Yu.N. Pestov, Yu. M. Shatunov, V. S. Banzarov, A.A. Ruban, A.E. Ryzhenenkov, S.I. Redin, S.G. Pivovarov, Yu.S. Popov, I.G. Snopkov, A.S. Zaytsev, Yu. A. Rogovsky, Fedor Ignatov, L.M. Barkov, A.L. Sibidanov, Ivan Koop, B.I. Khazin, G.V. Fedotovich, E.N. Gromov, A.V. Anisyonkov, I.B. Logashenko, P.A. Lukin, V.M. Aulchenko, A.N. Kozyrev, A.I. Vorobiov, D.N. Shemyakin, S.V. Karpov, V.E. Shebalin, E. P. Solodov, A.A. Grebenuk, D. Epifanov, Vassili Kazanin, V.M. Titov, N.S. Bashtovoy, L.B. Epshteyn, and R.R. Akhmetshin

Subjects
Physics, Nuclear and High Energy Physics, Range (particle radiation), Particle physics, Luminosity (scattering theory), Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Electron–positron annihilation, Detector, Magnetic detector, Atomic and Molecular Physics, and Optics, law.invention, Nuclear physics, law, Astrophysics::Solar and Stellar Astrophysics, High Energy Physics::Experiment, Collider, VEPP-2000, Astrophysics::Galaxy Astrophysics, Energy (signal processing)
Abstract

Regular data taking started at the VEPP-2000 e + e − collider with the CMD-3 detector. An energy scan of a center-of-mass energy range from 1 GeV to 2 GeV has been performed with an integrated luminosity of about 20 pb−1. We present first preliminary results from the CMD-3 detector.

Published
2012

29. Measurement of ϕ(1020) meson leptonic width with CMD-2 detector at VEPP-2M collider

Author

A. A. Grebenuk, A.E. Bondar, I.B. Logashenko, P.A. Lukin, N.M. Ryskulov, P. Krokovny, A.A. Ruban, S.I. Redin, A.S. Kuzmin, N. Gabyshev, S.I. Eidelman, D. Epifanov, D.N. Grigoriev, V.Sh. Banzarov, B.A. Shwartz, R.R. Akhmetshin, G.V. Fedotovich, A.S. Zaitsev, A. P. Lysenko, B.I. Khazin, K.Yu. Mikhailov, E.A. Perevedentsev, S.V. Karpov, A.V. Bragin, L.M. Barkov, A.L. Sibidanov, N.S. Bashtovoy, Yu. M. Shatunov, I. A. Koop, F.V. Ignatov, I.G. Snopkov, S.E. Baru, Yu.V. Yudin, E. P. Solodov, V.M. Aulchenko, A.S. Popov, Vassili Kazanin, and V.S. Okhapkin

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Meson, law, Hadron spectroscopy, Analytical chemistry, Resonance, Collider, law.invention
Abstract

The ϕ(1020) meson leptonic width has been determined from the combined analysis of 4 major decay modes of the resonance ( ϕ → K + K − , K L 0 K S 0 , π + π − π 0 , η γ ) studied with the CMD-2 detector at the VEPP-2M e + e − collider. The following value has been obtained: Γ ( ϕ → e + e − ) = 1.235 ± 0.006 ± 0.022 keV . The ϕ ( 1020 ) meson parameters in four main decay channels have been also recalculated: B ( ϕ → K + K − ) = 0.493 ± 0.003 ± 0.007 , B ( ϕ → K L K S ) = 0.336 ± 0.002 ± 0.006 , B ( ϕ → π + π − π 0 ) = 0.155 ± 0.002 ± 0.005 , B ( ϕ → η γ ) = 0.0138 ± 0.0002 ± 0.0002 .

Published
2011

30. The CMD-2 cryogenic magnetic detector

Author

E. P. Solodov, S.V. Karpov, P.Yu. Stepanov, T. A. Purlats, Vassili Kazanin, A.A. Ruban, S.I. Redin, S. G. Pivovarov, I.G. Snopkov, V.G Zavarzin, V.P. Smakhtin, M.A. Nikulin, V.M. Titov, D.A. Gorbachev, V.S. Okhapkin, V.A. Sidorov, V. E. Fedorenko, B.I. Khazin, P. P. Krokovnyi, P.A. Lukin, S.E. Baru, S.I. Eidelman, E.V. Anashkin, A. N. Skrinskii, B. N. Shuvalov, A. B. Nomerotskii, A. Bondar, L.M. Barkov, A.A. Grebenyuk, R.R. Akhmetshin, A. S. Zaitsev, N. S. Bashtovoi, A.V. Bragin, Yu.V. Yudin, V.M. Aulchenko, A.L. Sibidanov, Fedor Ignatov, V. A. Monich, D. Epifanov, D.V. Chernyak, K.Yu. Mikhailov, D. N. Grigorev, Yu. M. Shatunov, I. V. Zhuravkov, A.S. Kuzmin, G. M. Kolachev, N. Gabyshev, I.B. Logashenko, N.M. Ryskulov, V.Sh. Banzarov, S.G. Zverev, A.G. Shamov, D.V. Bondarev, A.I. Sukhanov, A.S. Popov, N.I. Root, G.V. Fedotovich, and B. A. Shvarts

Subjects
Superconductivity, Physics, Physics::Instrumentation and Detectors, business.industry, Detector, Magnetic tape, Magnetic detector, law.invention, Superconducting solenoid, Optics, Nuclear magnetic resonance, law, High Energy Physics::Experiment, business, Transformer, Instrumentation
Abstract

The CMD-2 cryogenic magnetic detector used in a set of experiments on the VEPP-2M electron-positron collider at energies as great as 1.4 GeV is described. The design of the detector subsystems and the algorithms for reconstructing tracks in the drift chamber and the CsI and BGO calorimeters are presented. The spatial and energy resolutions of the detector systems have been determined from analysis of experimental data. The design of the superconducting solenoid and the layout of its powering by means of a superconducting transformer are shown. The trigger system of the detector and the conditions for recording “charged” and “neutral” events on a magnetic tape are described. The procedure used to monitor the parameters of the detector systems during the experiment is presented.

Published
2006

31. Study of ϕ→π+π−π0 with CMD-2 detector

Author

N.I. Root, D.A. Gorbachev, A. Bondar, Yu. M. Shatunov, D. V. Bondarev, K.Yu. Mikhailov, Igor Nesterenko, A.S. Zaitsev, A. P. Lysenko, R.R. Akhmetshin, E. P. Solodov, S.I. Eidelman, A. V. Otboev, G.V. Fedotovich, S.V. Karpov, A.V. Bragin, V.A. Sidorov, P. Krokovny, A.A. Ruban, N.M. Ryskulov, B.A. Shwartz, Fedor Ignatov, S.I. Redin, Vassili Kazanin, D. Epifanov, Yu.V. Yudin, I. Logashenko, S.G. Zverev, B.I. Khazin, A.S. Kuzmin, E.A. Perevedentsev, V.S. Okhapkin, I.G. Snopkov, L.M. Barkov, N.S. Bashtovoy, M.A. Nikulin, D.N. Grigoriev, I. A. Koop, V.M. Aulchenko, A.N. Skrinsky, A.A. Grebeniuk, P.A. Lukin, N. Gabyshev, V.Sh. Banzarov, A. I. Milstein, Vladimir Smakhtin, A.S. Popov, and A.L. Sibidanov

Subjects
Physics, Nuclear and High Energy Physics, Range (particle radiation), Electron–positron annihilation, Detector, Dalitz plot, law.invention, Nuclear physics, Cross section (physics), Amplitude, law, Atomic physics, Collider, Positron annihilation
Abstract

The cross section of the process e+e−→π+π−π0 has been measured in the c.m. energy range 984–1060 MeV with the CMD-2 detector at the VEPP-2M collider. The obtained value of Br(ϕ→e+e−)Br(ϕ→π+π−π0)=(4.51±0.16±0.11)×10−5 is in good agreement with the previous measurements and has the best accuracy. Analysis of the Dalitz plot was performed. The contributions of the dominant ϕ→ρπ mechanism as well as of a small direct ϕ→3π amplitude were determined.

Published
2006

32. Precise measurements of the hadronic cross sections at the VEPP-2M collider with the CMD-2 detector

Author

B.I. Khazin, V.Sh. Banzarov, Yu.V. Yudin, Alexander Valishev, P. Krokovny, N.M. Ryskulov, N.I. Root, G.V. Fedotovich, A.L. Sibidanov, A.A. Grebeniuk, V.A. Sidorov, A. Bondar, V. W. Hughes, L.M. Barkov, A.A. Ruban, A. P. Lysenko, S.I. Redin, V.M. Titov, D.V. Bondarev, A.S. Kuzmin, S. Eidelman, I.G. Snopkov, D.A. Gorbachev, K.Yu. Mikhailov, A.N. Skrinsky, J. P. Miller, V.S. Okhapkin, Yu. M. Shatunov, B. L. Roberts, E. P. Solodov, Ivan Koop, D.N. Grigoriev, I.B. Logashenko, Vassili Kazanin, S.E. Baru, N.S. Bashtovoy, J. A. Thompson, S.G. Zverev, R.R. Akhmetshin, A.V. Bragin, Fedor Ignatov, A.A. Polunin, V. M. Aulchenko, S.V. Karpov, A.S. Popov, P.A. Lukin, N. Gabyshev, and B. Shwartz

Subjects
Physics, Nuclear and High Energy Physics, Range (particle radiation), Particle physics, Annihilation, Luminosity (scattering theory), Meson, Hadron, Detector, Atomic and Molecular Physics, and Optics, law.invention, Nuclear physics, law, High Energy Physics::Experiment, Nuclear Experiment, Collider, Astrophysics::Galaxy Astrophysics
Abstract

The current status of the updated results from the CMD-2 detector is presented. The cross sections of e + e − annihilation into hadrons were measured in the c.m. energy range from 0.37 to 1.39 GeV and are based on the total integrated luminosity of about 30 pb −1 . Results of refitting experimental data for the ρ, ω and mesons are reviewed.

Published
2004

33. Current status of the luminosity measurement with the CMD-3 detector at the VEPP-2000 e+e− collider

Author

A.E. Bondar, B.A. Shwartz, A.S. Popov, A.E. Ryzhenenkov, A.S. Zaytsev, E.N. Gromov, D.B. Shwartz, E.A. Perevedentsev, V.M. Aulchenko, A.N. Kozyrev, I.B. Logashenko, N.M. Ryskulov, K.Yu. Mikhailov, Semen Eidelman, S.V. Karpov, P. Yu. Shatunov, Yu.S. Popov, D.E. Berkaev, S.E. Gayazov, A.S. Kuzmin, I.G. Snopkov, Yu.N. Pestov, A.L. Sibidanov, Yu. A. Rogovsky, A.A. Ruban, S.I. Redin, L.M. Barkov, A.E. Kuzmenko, B.I. Khazin, Yu. M. Shatunov, G.V. Fedotovich, A.V. Bragin, P.A. Lukin, D. Epifanov, Ivan Koop, A.V. Anisyonkov, V.E. Shebalin, L.B. Epshteyn, D.N. Shemyakin, V. S. Banzarov, Yu.V. Yudin, V.M. Titov, A.A. Grebenuk, Alexey Talyshev, Fedor Ignatov, A. P. Lysenko, S.G. Pivovarov, S. Pirogov, A.I. Vorobiov, N.S. Bashtovoy, E. P. Solodov, R.R. Akhmetshin, Vassili Kazanin, S.A. Ahokhin, and D.N. Grigoriev

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Photon, Luminosity (scattering theory), Electron–positron annihilation, Hadron, Atomic and Molecular Physics, and Optics, law.invention, Nuclear physics, law, Radiative transfer, Collider, VEPP-2000, Bhabha scattering
Abstract

The first results of the luminosity measurement with the CMD-3 detector at the VEPP-2000 e + e − collider are presented. The luminosity was measured using two different processes e + e − → e + e − and e + e − → γ γ , that allowed to better understand and estimate the systematic accuracy which was found to be ∼2%. The analysis of the data was done on the integrated luminosity about 20 pb−1. A Monte-Carlo Generator Photon Jets (MCGPJ) [A.Arbuzov et al., EPJ C46, 689 (2006); S.Actis et al., EPJ C66, 585 (2010)] to simulate Bhabha scattering events as well as production of two photons was adopted for analysis of the data. A theoretical precision of these cross sections with radiative corrections (RC) is estimated to be better than 0.2%.

Published
2012

34. Measurement of the cross section for the process e + e − → K L 0 K S 0 in the energy range 2E=1.05–1.38 GeV with the CMD-2 detector at VEPP-2M

Author

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

Subjects
Physics, Nuclear and High Energy Physics, Range (particle radiation), Meson, Hadron, Detector, Elementary particle, Atomic and Molecular Physics, and Optics, Particle identification, law.invention, Nuclear physics, Cross section (physics), law, Collider
Abstract

The cross section for the process e + e − → K L 0 K S 0 is measured by using approximately 1000 events recorded by the CMD-2 detector at the VEPP-2M collider in the energy range from 1.05 to 1.38 GeV.

Published
2002

35. Z-chamber of the CMD-3 detector in the reconstruction of the track longitudinal coordinate

Author

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

Subjects
Physics, Annihilation, Physics::Instrumentation and Detectors, Track (disk drive), Hadron, Detector, Particle detector, Computational physics, law.invention, law, Calibration, Measuring instrument, Physics::Accelerator Physics, High Energy Physics::Experiment, Collider, Instrumentation, Mathematical Physics
Abstract

Since 2010 the CMD-3 detector has been collecting data at the e+e− collider VEPP-2000 in the Budker Institute of Nuclear Physics. One of the main goals of experiments with CMD-3 detector is the precise measurement of the cross sections of the e+e− annihilation into hadrons. For a large number of processes the main source of systematic uncertainty in cross sections determination due to accuracy of polar angles determination of the tracks. Z-chamber is used for the reconstruction of the track longitudinal coordinate which is with low systematic uncertainty. The measurement of longitudinal coordinates is performed by the collecting of the charge which is induced on the strip cathodes of the Z-chamber. The algorithms of the reconstruction of cathodes clusters and calibration procedure are presented.

Published
2017

36. Measurement of e+e− → π+π− cross section at CMD-3

Author

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

Subjects
Nuclear physics, Physics, Cross section (physics), Range (particle radiation), law, QC1-999, Detector, Statistical physics, Collider, law.invention
Abstract

Regular operation of the VEPP-2000 electron-positron collider started at the end of 2010 and about 60 pb −1 were collected so far by the CMD-3 detector in the whole available c.m. energy range from 0.32 GeV to 2.0 GeV. One of the main goals of the experiments at VEPP-2000 is a sub-percent measurement of the e + e − → π + π − cross-section. Here we present the overview of the data analysis techniques and the preliminary results of this measurement.

Published
2014

37. The BGO endcap calorimeter with phototriode readout for the CMD-2 detector

Author

D.N. Grigoriev, R.R. Akhmetshin, A.A. Ruban, V.P. Smakhtin, Yu.V. Yudin, and Vassili Kazanin

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Photon, Calorimeter (particle physics), Physics::Instrumentation and Detectors, business.industry, Detector, Scintillator, Particle detector, law.invention, Optics, law, Scintillation counter, Physics::Accelerator Physics, High Energy Physics::Experiment, Angular resolution, Collider, business, Instrumentation
Abstract

The endcap calorimeter of the CMD-2 detector for the VEPP-2M collider is described. The calorimeter consists of 680 BGO crystals, arranged in two endcaps. The light readout is performed by vacuum phototriodes. For the energy of incident photons from 100 to 700 MeV the energy resolution is 4–8% and angular resolution is 0.02–0.03 rad in agreement with MC simulation.

Published
2000

38. New measurement of the rare decay φ→η′γ with CMD-2

Author

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

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Luminosity (scattering theory), law, Branching fraction, Electron–positron annihilation, Detector, Collider, law.invention
Abstract

A new measurement of the rare decay φ → η ′ γ performed with the CMD-2 detector at the VEPP-2M collider in Novosibirsk is described. Of the data sample corresponding to the integrated luminosity of 14.5 pb −1 , twenty one events have been selected in the mode η ′→ π + π − η , η → γγ . The following branching ratio was obtained: B( φ → η ′ γ )=(8.2 +2.1 −1.9 ±1.1)·10 −5 .

Published
2000

39. First observation of the φ→π+π−γ decay

Author

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

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Meson, law, Branching fraction, Electron–positron annihilation, Radiative transfer, Collider, law.invention
Abstract

Radiative decays of the φ meson have been studied using a data sample of about 20 million φ decays collected by the CMD-2 detector at VEPP-2M collider in Novosibirsk. From selected e + e − → π + π − γ events the φ → π + π − γ decay has been observed for the first time. Under the assumption that the intermediate f 0 (980) γ state dominates in the φ → π + π − γ decay, the corresponding branching ratio is Br ( φ → f 0 (980) γ )=(1.93±0.46±0.50)×10 −4 . Selected e + e − → μ + μ − γ events were used to obtain Br ( φ → μ + μ − γ )=(1.43±0.45±0.14)×10 −5 for E γ >20 MeV. Using the same data sample, upper limits at 90% CL have been obtained for the C-violating decay of the φ : Br ( φ → ργ ) −5 ; and for the P- and CP-violating decay of the η : Br ( η → π + π − ) −4 .

Published
1999

40. Study of dynamics of φ→π+π−π0 decay with CMD-2 detector

Author

V.A. Sidorov, A.I. Sukhanov, V.I Ptitzyn, D.N. Grigoriev, P.M. Ivanov, B.I. Khazin, V. W. Hughes, Yu. M. Shatunov, D.H Brown, N.I. Root, S.G. Zverev, N.M. Ryskulov, T.A. Purlatz, Ivan Koop, G.V. Fedotovich, S. Eidelman, Igor Nesterenko, B. L. Roberts, A.A. Polunin, L.M. Kurdadze, V.S. Okhapkin, I.G. Snopkov, B.O Baibusinov, J. A. Thompson, A.S. Dvoretsky, Yu.I Merzlyakov, E.V. Anashkin, I.B. Logashenko, G.A Aksenov, A.N. Skrinsky, M. Arpagaus, P.Yu. Stepanov, R.R. Akhmetshin, P.A. Lukin, N. Gabyshev, V.M. Titov, B. Shwartz, V.P. Smakhtin, A.A. Ruban, Yu.V. Yudin, A. Bondar, L.M. Barkov, V. S. Banzarov, V.V Danilov, E. P. Solodov, A.A. Grebeniuk, A.S. Kuzmin, D.V. Chernyak, and A.G. Shamov

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Amplitude, Meson, law, Electron–positron annihilation, Detector, Dalitz plot, Atomic physics, Collider, law.invention
Abstract

A study of the φ → π + π − π 0 decay mode has been performed using a data sample of about 2.0 million φ decays collected by the CMD-2 detector at VEPP-2M collider in Novosibirsk. The following parameters of the φ -meson have been measured: Br ( φ → π + π − π 0 )=0.145±0.009±0.003 and δ φ − ω =162±17°. The analysis of the Dalitz plot showed the dominance of the φ → ρπ intermediate mechanism, the limits for the ratio of the direct amplitude of φ →3 π to that of φ → ρπ are −0.16 a 1 φ → π + π − η and direct φ → ργγ have been found for the first time: Br ( φ → π + π − η ) −4 and Br ( φ → ργγ ) −4 at 90% C.L.

Published
1998

41. First observation of the decay φ→η′(958)γ

Author

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

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, law, Branching fraction, Radiative decay, Collider, Event (particle physics), law.invention
Abstract

The decay φ → η ′ γ has been observed by the CMD-2 detector at the e + e − collider VEPP-2M at Novosibirsk. Of 5.5 million produced φ 's, six events of the φ → η ′ γ decay were selected with the expected background less than one event. The corresponding branching ratio is B( φ → η ′ γ )=1.2 +0.7 −0.5 ·10 −4 . It is the first observation of this radiative decay.

Published
1997

42. Recent results of the study of hadronic production with the CMD-2 and SND detectors at the VEPP-2M collider

Author

S. I. Serednyakov, N.M. Ryskulov, A. I. Milstein, A.V. Vasiljev, K. Y. Mikhailov, D.N. Grigoriev, A.S. Zaitsev, V.A. Sidorov, D.V. Bondarev, Z. K. Silagadze, Fedor Ignatov, S.E. Baru, E.V. Pakhtusova, I.B. Logashenko, A.E. Bondar, A.L. Sibidanov, Yu.V. Yudin, S.V. Karpov, Alexander Valishev, P. Krokovny, A.N. Skrinsky, A.V. Berdugin, A. Baratt, A.S. Kuzmin, Yuri Shatunov, A.S. Popov, Konstantin Beloborodov, P.A. Lukin, D.A. Bukin, A.V. Otboev, I. A. Koop, D. Epifanov, V.M. Aulchenko, A.A. Ruban, B.A. Shwartz, A. A. Korol, Alexander Bogdanchikov, N.I. Root, T.V. Dimova, S.I. Redin, E.A. Perevedentsev, V.S. Okhapkin, S.V. Koshuba, B.I. Khazin, V. W. Hughes, S.G. Zverev, M. N. Achasov, J. A. Thompson, R.R. Akhmetshin, V. P. Druzhinin, L.M. Barkov, N. Gabyshev, A.A. Polunin, E. P. Solodov, A. P. Lysenko, D.A. Gorbachev, N.S. Bashtovoy, A.A. Grebeniuk, Yu. V. Usov, A.G. Shamov, Vassili Kazanin, A. V. Bozhenok, Igor Nesterenko, G.V. Fedotovitch, I.G. Snopkov, S.I. Eidelman, A. D. Bukin, A.V. Bragin, and V.Sh. Banzarov

Subjects
Physics, Luminosity (scattering theory), Annihilation, Physics and Astronomy (miscellaneous), Meson, Physics::Instrumentation and Detectors, Hadron, Elementary particle, law.invention, Nuclear physics, Particle decay, law, High Energy Physics::Experiment, Vector meson, Collider, Engineering (miscellaneous)
Abstract

The Cryogenic Magnetic Detector (CMD-2) and Spherical Neutral Detector (SND) operated at the VEPP-2M electron-positron collider in the c.m. energy range 360-1380 MeV. The total integrated luminosity above 60 pb–1 has been collected by both detectors. The cross sections of hadronic production have been measured with high precision. New results for the light vector meson parameters and rare decay mode were obtained. PACS: 13.66.Bc Hadron production in e – e + interactions – 13.66.Jn Precision measurements in e – e + interactions

Published
2004

43. Results from the e+e− colliders in Novosibirsk

Author

I.G. Snopkov, N.S. Bashtovoy, Yu.N. Pestov, Yu.V. Yudin, Yu. A. Rogovsky, A.E. Kuzmenko, B.A. Shwartz, N.M. Ryskulov, A.E. Ryzhenenkov, Yu.S. Popov, A.S. Popov, A.S. Zaytsev, A.E. Bondar, R.R. Akhmetshin, P.A. Lukin, A.V. Bragin, L.M. Barkov, A.I. Vorobiov, S.V. Karpov, D. Epifanov, Alexey Talyshev, D.N. Shemyakin, E.A. Perevedentsev, E. P. Solodov, K.Yu. Mikhailov, S.E. Gayazov, Fedor Ignatov, S.I. Eidelman, A.A. Ruban, S.I. Redin, E.N. Gromov, Yu. M. Shatunov, V.E. Shebalin, A.L. Sibidanov, Vassili Kazanin, D.E. Berkaev, V.M. Titov, S.A. Ahokhin, B.I. Khazin, V. S. Banzarov, S.G. Pivovarov, I.B. Logashenko, I. A. Koop, V.M. Aulchenko, A.N. Kozyrev, A.L. Romanov, S. Pirogov, P. Yu. Shatunov, G.V. Fedotovich, A.A. Grebenuk, A.S. Kuzmin, A.V. Anisonkov, A. P. Lysenko, D.N. Grigoriev, D.B. Shwartz, and L.B. Epshteyn

Subjects
Physics, Particle physics, Luminosity (scattering theory), Physics::Instrumentation and Detectors, Electron–positron annihilation, QC1-999, Detector, law.invention, Nuclear physics, law, Physics::Accelerator Physics, High Energy Physics::Experiment, Collider
Abstract

Two e^+e^- colliders, VEPP-4M and VEPP2000, are taking data at the Budker INP in Novosibirsk, Russia. KEDR detector at the VEPP-4M collider continues deliver precision measurements of the charmonium family. Results of the psi(2S ) and psi(3770) study are presented. Two energy scans of a center-of-mass energy range from 1 GeV to 2 GeV has been performed by the VEPP2000 collider with an integrated luminosity of about 35 pb^-1, collected by each of the CMD-3 and SND detectors. This paper reports the latest results from VEPP-2000 obtained by the CMD-3 collaboration.

Published
2012

44. Measurement of φ meson parameters with CMD-2 detector at VEPP-2M collider

Author

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

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Meson, Physics::Instrumentation and Detectors, Hadron, Detector, law.invention, Nuclear physics, General purpose, law, Physics::Accelerator Physics, High Energy Physics::Experiment, Collider
Abstract

Results of the measurement of the φ meson parameters with the general purpose detector CMD-2 at the upgraded e + e − collider VEPP-2M at Novosibirsk are presented. This is the first measurement of the four major φ decay modes in a single e + e − experiment. The results based on about 55,600 identified hadronic events are consistent with previous measurements, and have precision comparable to the current world average.

Published
1995

45. Performance of the BGO endcap calorimeter with phototriode readout for the CMD-2 detector

Author

D.N. Grigoriev, Yu.V. Yudin, V.N. Shlegel, P.M. Beschastnov, R.R. Akhmetshin, Vladimir Smakhtin, V.E. Fedorenko, Y.V. Vasiliev, and E.E. Pyata

Subjects
Physics, Nuclear and High Energy Physics, Photomultiplier, business.industry, Physics::Instrumentation and Detectors, Preamplifier, Detector, Cosmic ray, Particle accelerator, Noise (electronics), Particle detector, law.invention, Calorimeter, Nuclear physics, Optics, Triode, Nuclear Energy and Engineering, law, Nuclear electronics, Physics::Accelerator Physics, High Energy Physics::Experiment, Electrical and Electronic Engineering, Collider, business
Abstract

The endcap calorimeter of the CMD-2 detector for the VEPP-2M collider is described. The calorimeter contains 680 BGO crystals read out by the vacuum phototriodes. Charge sensitive preamplifiers are placed directly on the phototriodes for the best noise performance. The calorimeter was installed during the last year. Calibration by cosmic rays showed the energy equivalent of the electronic noise to be about 0.9 MeV during operation in a 1 T magnetic field which corresponds to design value. >

Published
1995

46. Performance of the BGO luminosity monitor of the CMD-2 detector

Author

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

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Luminosity (scattering theory), Physics::Instrumentation and Detectors, business.industry, Astrophysics::High Energy Astrophysical Phenomena, Detector, Bremsstrahlung, law.invention, Optics, law, Astrophysics::Solar and Stellar Astrophysics, High Energy Physics::Experiment, Absorption (electromagnetic radiation), business, Collider, Instrumentation, Astrophysics::Galaxy Astrophysics
Abstract

The luminosity monitor of the VEPP-2M collider at the CMD-2 detector is described. The monitor consists of two identical total absorption counters based on 9 X 0 BGO crystal with phototriode readout. Double bremsstrahlung events are used for luminosity measurement.

Published
1996

47. Performance of the BGO endcap calorimeter of the CMD-3 detector

Author

Vassili Kazanin, R.R. Akhmetshin, D.N. Grigoriev, Yu.V. Yudin, and A.E. Kuzmenko

Subjects
Physics, Physics::Instrumentation and Detectors, business.industry, Detector, Scintillator, Capacitance, Calorimeter, Semiconductor detector, Photodiode, law.invention, Nuclear physics, Upgrade, Optics, law, High Energy Physics::Experiment, Collider, business, Instrumentation, Mathematical Physics
Abstract

The BGO endcap calorimeter was successfully operated in the CMD-2 detector at the VEPP-2M collider. It consists of 680 BGO crystals, each with a size of 25 × 25 × 150 mm3, arranged in two identical endcaps, with a total crystal weight of 450 kg. The light readout used vacuum phototriodes. The endcap calorimeter has been upgraded to operate in the CMD-3 detector at the new collider VEPP-2000. The major part of the endcap calorimeter, the BGO crystals, remains the same. The main upgrade is the use of silicon PIN photodiodes and new electronics. The main reason to change a photosensitive device is the strong non-uniform magnetic field in the endcap calorimeter volume and reduced available space. The Hamamatsu PIN photodiode S3590-08 was chosen as an optimal solution, as it is insensitive to magnetic fields and is both compact and stable. An order of magnitude larger capacitance of silicon photodiodes requires design and produce new custom electronics. The upgrade is expected to bring an overall improvement of parameters. The endcap calorimeter has been installed in the detector and participates in data taking which started in 2010. The preliminary energy resolution is measured in the energy range 160–1000 MeV. It is better to compare to the CMD-2 detector.

Published
2014

48. Current status of luminosity measurement with the CMD-3 detector at the VEPP-2000 e+e− collider

Author

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

Subjects
Physics, Measurement method, Particle physics, Luminosity (scattering theory), Astrophysics::High Energy Astrophysical Phenomena, Detector, Astrophysics::Cosmology and Extragalactic Astrophysics, law.invention, Nuclear physics, law, Physics::Accelerator Physics, High Energy Physics::Experiment, Current (fluid), Collider, Instrumentation, VEPP-2000, Astrophysics::Galaxy Astrophysics, Mathematical Physics, Energy (signal processing)
Abstract

Since December 2010 the CMD-3 detector has taken data at the electron-positron collider VEPP-2000. The collected data sample corresponds to an integrated luminosity of 60 pb−1 in the c.m. energy from 0.32 up to 2 GeV. The preliminary results of the luminosity measurement are presented in various energy ranges. The current accuracy for integrated luminosity is estimated to be 1%.

Published
2014

49. 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

50. 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

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