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1. 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

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

Subjects
Physics, QC1-999
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
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2. Identification of the e+e−→ nn̅ events in CMD-3 detector

Author

Amirkhanov A.N., Fedotovich G.V., Gribanov S.S., Logashenko I.B., Popov A.S., Ryskulov N.M., and Ryzhenenkov A.E.

Subjects
Physics, QC1-999
Abstract

A large amount of data collected with the CMD-3 detector above the threshold of the nn̅pair allows to measure the cross section of the process e+e−→ nn̅and the neutron form factor with good accuracy. This task is complicated by a large number of background events and necessity of finding ways to suppress them. A technique of identification for e+e−→ nn̅events is described.

Published
2019
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3. Current status of luminosity measurement with the CMD-3 detector at the VEPP-2000 collider

Author

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

Subjects
Physics, QC1-999
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
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4. Study of e+e− annihilation to hadrons at the VEPP-2000 collider

Author

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

Subjects
Physics, QC1-999
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−→π+π−,nn¯,π+π−η,π+π−π0η,KSKLπ0$e^+e^-\rightarrow\pi^+\pi^-,n\overline n,\pi^+\pi^-\eta,\pi^+\pi^-\pi^0\eta,K_SK_L\pi^0$, etc.

Published
2019
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5. CMD-3 Overview

Author

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

Subjects
Physics, QC1-999
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 s≤2$ \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
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6. Preliminary results on CMD-3 measurement of e+e−→ π+π− cross section

Author

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

Subjects
Physics, QC1-999
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
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7. Measurement of the hadronic cross sections with the CMD-3 and SND detectors at the VEPP-2000 collider

Author

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

Subjects
Physics, QC1-999
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
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8. Measurement of the hadronic cross sections at Novosibirsk

Author

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

Subjects
Physics, QC1-999
Abstract

Two experiments, CMD-3 and SND, collected over 100 pb−1 in total taking data in 2011-2013 at the VEPP-2000 electron-positron collider. The data sample covers the whole available c.m. energy range from 0.32 GeV to 2.0 GeV. An upgrade of VEPP-2000 started in the second half of 2013, aimed at the luminosity increase up to 10 times at 2.0 GeV. Data taking is expected to resumed in 2015. The current results of analysis of the collected data for various modes of e+ e− → hadrons are discussed.

Published
2015
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9. Charged particle identification with the liquid xenon calorimeter of the CMD-3 detector

Author

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

Published
2021
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10. Recent results from the CMD-3 detector

Author

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

Published
2020
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11. Hadronic cross sections with the CMD-3 detector at the VEPP-2000

Author

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

Published
2018
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12. Study of the process in the c.m. energy range 1.6–2.0 GeV with the CMD-3 detector

Author

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

Abstract

A cross section of the process e+e−→KS0K±π∓π+π− has been measured for the first time using a data sample of 185.4 pb$^{−1}$ collected with the CMD-3 detector at the VEPP-2000 e+e− collider. With the KS0→π+π− decay detection, 373±20 and 514±28 signal events have been selected with six and five reconstructed tracks, respectively, in the center-of-mass energy range 1.6–2.0 GeV. The total systematic uncertainty of the cross section is about 15%. A study of the production dynamics allows us to extract a contribution from the e+e−→f1(1285)π+π− intermediate state and to measure the corresponding cross section. The intermediate states with the f1(1420) and f1(1510) resonances have been observed.

Published
2023

13. Study of the process e+e−→KS0K±π∓π+π− in the c.m. energy range 1.6–2.0 GeV with the CMD-3 detector

Author

Akhmetshin, R.R., primary, Amirkhanov, A.N., additional, Anisenkov, A.V., additional, Aulchenko, V.M., additional, Bashtovoy, N.S., additional, Berkaev, D.E., additional, Bondar, A.E., additional, Bragin, A.V., additional, Eidelman, S.I., additional, Epifanov, D.A., additional, Epshteyn, L.B., additional, Erofeev, A.L., additional, Fedotovich, G.V., additional, Gorkovenko, A.O., additional, Grancagnolo, F.J., additional, Grebenuk, A.A., additional, Gribanov, S.S., additional, Grigoriev, D.N., additional, Ignatov, F.V., additional, Ivanov, V.L., additional, Karpov, S.V., additional, Kazanin, V.F., additional, Kirpotin, A.N., additional, Koop, I.A., additional, Korobov, A.A., additional, Kozyrev, A.N., additional, Kozyrev, E.A., additional, Krokovny, P.P., additional, Kuzmin, A.S., additional, Logashenko, I.B., additional, Lukin, P.A., additional, Mikhailov, K.Yu., additional, Obraztsov, I.V., additional, Okhapkin, V.S., additional, Otboev, A.V., additional, Pestov, Yu.N., additional, Popov, A.S., additional, Razuvaev, G.P., additional, Rogovsky, Yu.A., additional, Ruban, A.A., additional, Ryskulov, N.M., additional, Ryzhenenkov, A.E., additional, Semenov, A.V., additional, Senchenko, A.I., additional, Shatunov, P.Yu., additional, Shatunov, Yu.M., additional, Shebalin, V.E., additional, Shemyakin, D.N., additional, Shwartz, B.A., additional, Shwartz, D.B., additional, Sibidanov, A.L., additional, Solodov, E.P., additional, Titov, V.M., additional, Talyshev, A.A., additional, Tolmachev, S.S., additional, Vorobiov, A.I., additional, Zemlyansky, I.M., additional, Zhadan, D.S., additional, Zubakin, A.S., additional, and Yudin, Yu.V., additional

Published
2023
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14. Study of the process in the c.m. energy range 1.6–2.0 GeV with the CMD-3 detector

Author

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

Abstract

The cross section of the process e+e−→KS0KS0π+π− has been measured using a data sample of 56.7 pb$^{−1}$ collected with the CMD-3 detector at the VEPP-2000 e+e− collider. 596±27 and 210±18 signal events have been selected with six and five detected tracks, respectively, in the center-of-mass energy range 1.6–2.0 GeV. The total systematic uncertainty of the cross section is about 10%. The study of the production dynamics confirms the dominance of the K⁎(892)+K⁎(892)− intermediate state.

Published
2020

15. Study of the process e+e−→KS0KS0π+π− in the c.m. energy range 1.6–2.0 GeV with the CMD-3 detector

Author

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

Published
2020
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16. Study of the process → with the CMD-3 detector at the VEPP-2000 collider

Author

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

Abstract

The process e+e−→K+K−η has been studied in the center-of-mass energy range from 1.59 to 2.007 GeV using the data sample of 59.5 pb$^{−1}$, collected with the CMD-3 detector at the VEPP-2000 e+e− collider in 2011, 2012 and 2017. The K+K−η final state is found to be dominated by the contribution of the ϕ(1020)η intermediate state. The cross section of the process e+e−→ϕ(1020)η has been measured with a systematic uncertainty of 5.1% on the base of 3009 ± 67 selected events. The obtained cross section has been used to calculate the contribution to the anomalous magnetic moment of the muon: aμϕη(E<1.8GeV)=(0.321±0.015stat±0.016syst)×10−10, aμϕη(E<2.0GeV)=(0.440±0.015stat±0.022syst)×10−10. From the cross section approximation the ϕ(1680) meson parameters have been determined with better statistical precision, than in previous studies.

Published
2019

17. Study of the process → 3( ) in the c.m. energy range 1.6–2.0 GeV with the CMD-3 detector

Author

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

Abstract

The cross section of the process e+e−→3(π+π−)π0 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
2019

18. Study of the process e+e−→KS0KL0 in the center-of-mass energy range 1004–1060 MeV with the CMD-3 detector at the VEPP-2000 e+e− collider

Author

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

Subjects
Nuclear and High Energy Physics
Published
2016
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19. Study of the process e+e−→pp¯ in the c.m. energy range from threshold to 2 GeV with the CMD-3 detector

Author

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

Subjects
Nuclear and High Energy Physics
Published
2016
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20. Study of the process e+e− → K+K−η with the CMD-3 detector at the VEPP-2000 collider

Author

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

Published
2019
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21. Observation of a fine structure in e+e− → hadrons production at the nucleon-antinucleon threshold

Author

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

Published
2019
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22. Study of the process e+e− → 3(π+π−)π0 in the c.m. energy range 1.6–2.0 GeV with the CMD-3 detector

Author

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

Published
2019
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23. Study of the process e+e−→K+K− in the center-of-mass energy range 1010–1060 MeV with the CMD-3 detector

Author

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

Published
2018
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24. 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

Denig, A., Redmer, C.-F., Fedotovich, G.V., Akhmetshin, R.R., Amirkhanov, A.N., Anisenkov, A.V., Aulchenko, V.M., Banzarov, V.S., Bashtovoy, N.S., Berkaev, D.E., Bondar, A.E., Bragin, A.V., Eidelman, S.I., Epifanov, D.A., Epshteyn, L.B., Erofeev, A.L., Gayazov, S.E., Grebenuk, A.A., Gribanov, S.S., and Grigoriev, D.N.

Subjects
ELECTRON-positron interactions, ELECTROMAGNETIC coupling, DETECTORS, LUMINOSITY, KAONS
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. [ABSTRACT FROM AUTHOR]

Published
2019
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25. Preliminary results on CMD-3 measurement of e+e−→ π+π− cross section.

Author

Denig, A., Redmer, C.-F., Ignatov, Fedor, Logashenko, I.B., Akhmetshin, R.R., Amirkhanov, A.N., Anisenkov, A.V., Aulchenko, V.M., Banzarov, V.S., Bashtovoy, N.S., Berkaev, D.E., Bondar, A.E., Bragin, A.V., Eidelman, S.I., Epifanov, D.A., Epshteyn, L.B., Erofeev, A.L., Fedotovich, G.V., Gayazov, S.E., and Grebenuk, A.A.

Subjects
ELECTRON-positron interactions, LUMINOSITY, STANDARD model (Nuclear physics), MUONIUM, HADRONS
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. [ABSTRACT FROM AUTHOR]

Published
2019
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26. CMD-3 Overview.

Author

Denig, A., Redmer, C.-F., Logashenko, Ivan B., Ignatov, F.V., Akhmetshin, R.R., Amirkhanov, A.N., Anisenkov, A.V., Aulchenko, V.M., Banzarov, V.S., Bashtovoy, N.S., Berkaev, D.E., Bondar, A.E., Bragin, A.V., Eidelman, S.I., Epifanov, D.A., Epshteyn, L.B., Erofeev, A.L., Fedotovich, G.V., Gayazov, S.E., and Grebenuk, A.A.

Subjects
CALORIMETERS, MUONS, HADRONS, MAGNETIC moments, COLLIDERS (Nuclear physics)
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 s ≤ 2 $ \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. [ABSTRACT FROM AUTHOR]

Published
2019
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27. Identification of the e+e−→ nn̅ events in CMD-3 detector.

Author

Amirkhanov, A.N., Fedotovich, G.V., Gribanov, S.S., Logashenko, I.B., Popov, A.S., Ryskulov, N.M., Ryzhenenkov, A.E., Achasov, M.N., Ignatov, F.V., and Krokovny, P.P.

Subjects
ELECTRON-electron interactions, NUCLEAR cross sections, NUCLEAR counters, PHYSICAL measurements, NUCLEAR physics experiments
Abstract

A large amount of data collected with the CMD-3 detector above the threshold of the nn̅pair allows to measure the cross section of the process e+e−→ nn̅and the neutron form factor with good accuracy. This task is complicated by a large number of background events and necessity of finding ways to suppress them. A technique of identification for e+e−→ nn̅events is described. [ABSTRACT FROM AUTHOR]

Published
2019
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28. Study of the process in the c.m. energy range from threshold to 2 GeV with the CMD-3 detector

Author

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

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.

Published
2016

29. 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

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

Published
2017
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30. Current status of luminosity measurement with the CMD-3 detector

Author

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

Published
2017
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31. Study of the process e + e − → π + π − π + π − in the c.m. energy range 920–1060 MeV with the CMD-3 detector

Author

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

Published
2017
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32. Study of e+e− annihilation to hadrons at the VEPP-2000 collider.

Author

Wrońska, A., Magiera, A., Przygoda, W., Beloborodov, K.I., Achasov, M.N., Akhmetshin, R.R., Amirkhanov, A.N., Anisenkov, A.V., Aulchenko, V.M., Banzarov, V.Sh., Barnyakov, A.Yu., Bashtovoy, N.S., Berdyugin, A.V., Bogdanchikov, A.G., Bondar, A.E., Botov, A.A., Bragin, A.V., Dimova, T.V., Druzhinin, V.P., and Eidelman, S.I.

Subjects
HEAT transfer, MOMENTUM transfer, TRANSPORT theory, REYNOLDS analogy, MASS transfer
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 − → π + π − , n n ¯ , π + π − η , π + π − π 0 η , K S K L π 0 $e^+e^-\rightarrow\pi^+\pi^-,n\overline n,\pi^+\pi^-\eta,\pi^+\pi^-\pi^0\eta,K_SK_L\pi^0$ , etc. [ABSTRACT FROM AUTHOR]

Published
2019
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33. Measurement of the hadronic cross sections with the CMD-3 and SND detectors at the VEPP-2000 collider.

Author

Aharonov, Y., Bravina, L., Kabana, S., Korol, A.A., Achasov, M.N., Akhmetshin, R.R., Amirkhanov, A.N., Anisenkov, A.V., Aulchenko, V.M., Banzarov, V.S., Barnyakov, A. Yu., Bashtovoy, N.S., Beloborodov, K.I., Berdyugin, A.V., Berkaev, D.E., Bogdanchikov, A.G., Bondar, A.E., Botov, A.A., Bragin, A.V., and Dimova, T.V.

Subjects
NUCLEAR cross sections, ELECTRON-positron interactions, COLLIDERS (Nuclear physics), MUONS, LUMINOSITY, HADRONS
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. [ABSTRACT FROM AUTHOR]

Published
2018
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34. Study of the processe+e−→KS0KL0in the center-of-mass energy range 1004–1060 MeV with the CMD-3 detector at the VEPP-2000 e + e − collider

Author

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

Published
2016
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35. Measurement of the e + e − → K + K − π + π − cross section with the CMD-3 detector at the VEPP-2000 collider

Author

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

Published
2016
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36. Study of the process e+e− → π+π−π0η in the c.m. energy range 1394–2005 MeV with the CMD-3 detector.

Author

Akhmetshin, R.R., Amirkhanov, A.N., Anisenkov, A.V., Aulchenko, V.M., Banzarov, V.Sh., Bashtovoy, N.S., Berkaev, D.E., Bondar, A.E., Bragin, A.V., Eidelman, S.I., Epifanov, D.A., Epshteyn, L.B., Erofeev, A.L., Fedotovich, G.V., Gayazov, S.E., Grebenuk, A.A., Gribanov, S.S., Grigoriev, D.N., Ignatov, F.V., and Ivanov, V.L.

Subjects
*NUCLEAR energy, *NUCLEAR counters, *NUCLEAR cross sections, *CENTER of mass, *INTERMEDIATE state (Superconductors)
Abstract

The cross section of the process e + e − → π + π − π 0 η 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 ± 95 signal events have been selected in the center-of-mass energy range 1394–2005 MeV. The production dynamics is dominated by the ω ( 782 ) η and ϕ ( 1020 ) η intermediate states in the lower energy range, and by the a 0 ( 980 ) ρ ( 770 ) intermediate state at higher energies. [ABSTRACT FROM AUTHOR]

Published
2017
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37. Study of the process e+e− → π+π−π+π− in the c.m. energy range 920–1060 MeV with the CMD-3 detector.

Author

Akhmetshin, R.R., Amirkhanov, A.N., Anisenkov, A.V., Aulchenko, V.M., Banzarov, V.Sh., Bashtovoy, N.S., Berkaev, D.E., Bondar, A.E., Bragin, A.V., Eidelman, S.I., Epifanov, D.A., Epshteyn, L.B., Erofeev, A.L., Fedotovich, G.V., Gayazov, S.E., Grebenuk, A.A., Gribanov, S.S., Grigoriev, D.N., Ignatov, F.V., and Ivanov, V.L.

Subjects
*DETECTORS, *SPECIAL relativity (Physics), *RADIATIVE corrections, *CALORIMETERS, *COMPUTER simulation
Abstract

A cross section of the process e + e − → π + π − π + π − has been measured using 6798 ± 93 signal events from a data sample corresponding to an integrated luminosity of 9.8 pb −1 collected with the CMD-3 detector in the center-of-mass energy range 920–1060 MeV. The measured cross section exhibits a pattern of interference of the ϕ ( 1020 ) → π + π − π + π − decay with a non-resonant process e + e − → π + π − π + π − , from which we obtain the branching fraction of the doubly suppressed decays (by G-parity and OZI rule): B ( ϕ → π + π − π + π − ) = ( 6.5 ± 2.7 ± 1.6 ) × 10 − 6 . [ABSTRACT FROM AUTHOR]

Published
2017
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38. Study of the process [formula omitted] in the c.m. energy range 1.6–2.0 GeV with the CMD-3 detector.

Author

Akhmetshin, R.R., Amirkhanov, A.N., Anisenkov, A.V., Aulchenko, V.M., Bashtovoy, N.S., Berkaev, D.E., Bondar, A.E., Bragin, A.V., Eidelman, S.I., Epifanov, D.A., Epshteyn, L.B., Erofeev, A.L., Fedotovich, G.V., Gorkovenko, A.O., Grancagnolo, F.J., Grebenuk, A.A., Gribanov, S.S., Grigoriev, D.N., Ignatov, F.V., and Ivanov, V.L.

Subjects
*DETECTORS, *CENTER of mass
Abstract

A cross section of the process e + e − → K S 0 K ± π ∓ π + π − has been measured for the first time using a data sample of 185.4 pb−1 collected with the CMD-3 detector at the VEPP-2000 e + e − collider. With the K S 0 → π + π − decay detection, 373±20 and 514±28 signal events have been selected with six and five reconstructed tracks, respectively, in the center-of-mass energy range 1.6–2.0 GeV. The total systematic uncertainty of the cross section is about 15%. A study of the production dynamics allows us to extract a contribution from the e + e − → f 1 (1285) π + π − intermediate state and to measure the corresponding cross section. The intermediate states with the f 1 (1420) and f 1 (1510) resonances have been observed. [ABSTRACT FROM AUTHOR]

Published
2023
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39. Study of the process [formula omitted] in the c.m. energy range 1.6–2.0 GeV with the CMD-3 detector.

Author

Akhmetshin, R.R., Amirkhanov, A.N., Anisenkov, A.V., Aulchenko, V.M., Banzarov, V.Sh., Bashtovoy, N.S., Berkaev, D.E., Bondar, A.E., Bragin, A.V., Eidelman, S.I., Epifanov, D.A., Epshteyn, L.B., Erofeev, A.L., Fedotovich, G.V., Gayazov, S.E., Grancagnolo, F.J., Grebenuk, A.A., Gribanov, S.S., Grigoriev, D.N., and Ignatov, F.V.

Subjects
*DETECTORS, *SOCIAL dominance, *UNCERTAINTY
Abstract

The cross section of the process e + e − → K S 0 K S 0 π + π − has been measured using a data sample of 56.7 pb−1 collected with the CMD-3 detector at the VEPP-2000 e + e − collider. 596±27 and 210±18 signal events have been selected with six and five detected tracks, respectively, in the center-of-mass energy range 1.6–2.0 GeV. The total systematic uncertainty of the cross section is about 10%. The study of the production dynamics confirms the dominance of the K ⁎ (892) + K ⁎ (892) − intermediate state. [ABSTRACT FROM AUTHOR]

Published
2020
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40. Study of the process e+e− → K+K− in the center-of-mass energy range 1010–1060 MeV with the CMD-3 detector.

Author

Akhmetshin, R.R., Banzarov, V.S., Bashtovoy, N.S., Bragin, A.V., Ignatov, F.V., Karpov, S.V., Kasaev, A.S., Koop, I.A., Lysenko, A.P., Okhapkin, V.S., Pestov, Yu.N., Ruban, A.A., Ryskulov, N.M., Shatunov, Yu.M., Vorobiov, A.I., Kozyrev, E.A., Solodov, E.P., Amirkhanov, A.N., Anisenkov, A.V., and Aulchenko, V.M.

Subjects
*LUMINOSITY, *CENTER of mass, *NUCLEAR cross sections, *MAGNETIC moments, *MESONS, *ELECTRON-electron interactions
Abstract

The process e + e − → K + K − has been studied using 1.7 × 10 6 events from a data sample corresponding to an integrated luminosity of 5.7 pb −1 collected with the CMD-3 detector in the center-of-mass energy range 1010–1060 MeV. The cross section is measured with about 2% systematic uncertainty and is used to calculate the contribution to the anomalous magnetic moment of the muon a μ K + K − = ( 19.33 ± 0.40 ) × 10 − 10 , and to obtain the ϕ ( 1020 ) meson parameters. We consider the relationship between the e + e − → K + K − and e + e − → K S 0 K L 0 cross sections and compare it to the theoretical prediction. [ABSTRACT FROM AUTHOR]

Published
2018
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41. Measurement of the e+e− → K+K−π+π− cross section with the CMD-3 detector at the VEPP-2000 collider.

Author

Shemyakin, D.N., Fedotovich, G.V., Akhmetshin, R.R., Amirkhanov, A.N., Anisenkov, A.V., Aulchenko, V.M., Banzarov, V.Sh., Bashtovoy, N.S., Bondar, A.E., Bragin, A.V., Eidelman, S.I., Epifanov, D.A., Epshteyn, L.B., Erofeev, A.L., Gayazov, S.E., Grebenuk, A.A., Gribanov, S.S., Grigoriev, D.N., Ignatov, F.V., and Ivanov, V.L.

Subjects
*NUCLEAR cross sections, *NUCLEAR counters, *CENTER of mass, *PAIR production, *COLLIDERS (Nuclear physics)
Abstract

The process e + e − → K + K − π + π − has been studied in the center-of-mass energy range from 1500 to 2000 MeV using a data sample of 23 pb −1 collected with the CMD-3 detector at the VEPP-2000 e + e − collider. Using about 24 000 selected events, the e + e − → K + K − π + π − cross section has been measured with a systematic uncertainty decreasing from 11.7% at 1500–1600 MeV to 6.1% above 1800 MeV. A preliminary study of K + K − π + π − production dynamics has been performed. [ABSTRACT FROM AUTHOR]

Published
2016
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