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138 results on '"Epshteyn, L. B."'

1. Measurement of the pion form factor with CMD-3 detector and its implication to the hadronic contribution to muon (g-2)

Author

Collaboration, CMD-3, Ignatov, F. V., 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., Ivanov, V. L., Karpov, S. V., Kasaev, A. S., Kazanin, V. F., Khazin, B. I., Kirpotin, A. N., 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., Obraztsov, I. V., Okhapkin, V. S., Otboev, A. 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., 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., Timoshenko, M. V., Titov, V. M., Tolmachev, S. S., Vorobiov, A. I., Yudin, Yu. V., Zemlyansky, I. M., Zhadan, D. S., Zharinov, Yu. M., and Zubakin, A. S.

Subjects
High Energy Physics - Experiment
Abstract

The cross section of the process $e^+e^-\to\pi^+\pi^-$ has been measured in the center-of-mass energy range from 0.32 to 1.2 GeV with the CMD-3 detector at the electron-positron collider VEPP-2000. The measurement is based on an integrated luminosity of about 88 pb$^{-1}$, of which 62 pb$^{-1}$ represent a complete dataset collected by CMD-3 at center-of-mass energies below 1 GeV. In the dominant region near the $\rho$ resonance a systematic uncertainty of 0.7% was achieved. The implications of the presented results for the evaluation of the hadronic contribution to the anomalous magnetic moment of the muon are discussed., Comment: 8 pages, 3 figures; as published in Phys. Rev. Lett. 132, 231903

Published
2023
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2. Measurement of the $e^+e^-\to\pi^+\pi^-$ cross section from threshold to 1.2 GeV with the CMD-3 detector

Author

Collaboration, CMD-3, Ignatov, F. V., 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., Ivanov, V. L., Karpov, S. V., Kasaev, A. S., Kazanin, V. F., Khazin, B. I., Kirpotin, A. N., 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., Obraztsov, I. V., Okhapkin, V. S., Otboev, A. 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., 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., Timoshenko, M. V., Titov, V. M., Tolmachev, S. S., Vorobiov, A. I., Zemlyansky, I. M., Zhadan, D. S., Zharinov, Yu. M., Zubakin, A. S., and Yudin, Yu. V.

Subjects
High Energy Physics - Experiment
Abstract

The cross section of the process $e^+e^-\to\pi^+\pi^-$ has been measured in the center of mass energy range from 0.32 to 1.2 GeV with the CMD-3 detector at the electron-positron collider VEPP-2000. The measurement is based on a full dataset collected below 1 GeV during three data taking seasons, corresponding to an integrated luminosity of about 62 pb$^{-1}$. In the dominant $\rho$-resonance region, a systematic uncertainty of 0.7% has been reached. At energies around $\phi$-resonance the $\pi^+\pi^-$ production cross section was measured for the first time with high beam energy resolution. The forward-backward charge asymmetry in the $\pi^+\pi^-$ production has also been measured. It shows a strong deviation from the theoretical prediction based on the conventional scalar quantum electrodynamics framework, and it is in good agreement with the generalized vector-meson-dominance and dispersive-based predictions. The impact of the presented results on the evaluation of the hadronic contribution to the anomalous magnetic moment of muon is discussed., Comment: 54 pages, 36 figures; as published in Phys. Rev. D 109, 112002

Published
2023
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3. 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., Vorobiov, A. I., and Yudin, Yu. V.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

The paper describes a method of the charged particle identification, developed for the \mbox{CMD-3} detector, installed at the VEPP-2000 $e^{+}e^{-}$ collider. The method is based on the application of the boosted decision trees classifiers, trained for the optimal separation of electrons, muons, pions and kaons in the momentum range from 100 to $1200~{\rm MeV}/c$. 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 \mbox{CMD-3}. The event samples for training of the classifiers are taken from the simulation. Various issues of the detector response tuning in simulation and calibration of the calorimeter strip channels are considered. Application of the method is illustrated by the examples of separation of the $e^+e^-(\gamma)$ and $\pi^+\pi^-(\gamma)$ final states and of selection of the $K^+K^-$ final state at high energies.

Published
2020

4. Measurement of the $e^{+}e^{-}\rightarrow\eta\pi^{+}\pi^{-}$ cross section with the CMD-3 detector at the VEPP-2000 collider

Author

Gribanov, S. S., Popov, A. S., 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., Grigoriev, D. N., Ignatov, F. V., Ivanov, V. L., Karpov, S. V., Kazanin, V. F., Kirpotin, A. N., Koop, I. A., Korobov, A. 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., Razuvaev, G. P., Rogovsky, Yu. A., Ruban, A. A., Ryskulov, N. M., Ryzhenenkov, A. E., Semenov, A. V., 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., Tolmachev, S. S., Vorobiov, A. I., Zemlyansky, I. M., and Yudin, Yu. V.

Subjects
High Energy Physics - Experiment
Abstract

The cross section of the process $e^{+}e^{-}\rightarrow\eta\pi^{+}\pi^{-}$ is measured using the data collected with the CMD-$3$ detector at the VEPP-$2000$ collider in the center-of-mass energy range from $1.1$ to $2.0$ GeV. The decay mode $\eta\rightarrow\gamma\gamma$ is used for $\eta$ meson reconstruction in the data sample corresponding to an integrated luminosity of $78.3$ pb$^{-1}$. The energy dependence of the $e^{+}e^{-}\rightarrow\eta\pi^{+}\pi^{-}$ cross section is fitted within the framework of vector meson dominance in order to extract the $\Gamma(\rho(1450)\rightarrow{^{+}e^{-}})\mathcal{B}(\rho(1450)\rightarrow\eta\pi^{+}\pi^{-})$ and the $\Gamma(\rho(1700)\rightarrow{e^{+}e^{-}})\mathcal{B}(\rho(1700)\rightarrow\eta\pi^{+}\pi^{-})$ products. Based on conservation of vector current, the analysed data are used to test the relationship between the $e^{+}e^{-}\rightarrow\eta\pi^{+}\pi^{-}$ cross section and the spectral function in $\tau^-\rightarrow\eta\pi^-\pi^0\nu_\tau$ decay. The $e^{+}e^{-}\rightarrow\eta\pi^{+}\pi^{-}$ cross section measured with the CMD-$3$ detector is in good agreement with the previous measurements.

Published
2019
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5. Study of the process $e^+e^-{\to}K^+K^-\eta$ 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.

Subjects
High Energy Physics - Experiment
Abstract

The process $e^+e^-{\to}K^+K^-\eta$ 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 $K^+K^-\eta$ final state is found to be dominated by the contribution of the $\phi(1020)\eta$ intermediate state. The cross section of the process $e^+e^-{\to}\phi(1020)\eta$ has been measured with a systematic uncertainty of 5.1$\%$ on the base of 3009 $\pm$ 67 selected events. The obtained cross section has been used to calculate the contribution to the anomalous magnetic moment of the muon: $a_{\mu}^{\phi\eta}(E<1.8\, {\rm GeV})=(0.321 \pm 0.015_{\rm stat} \pm 0.016_{\rm syst}) \times 10^{-10}$, $a_{\mu}^{\phi\eta}(E<2.0\, {\rm GeV})=(0.440 \pm 0.015_{\rm stat} \pm 0.022_{\rm syst}) \times 10^{-10}$. From the cross section approximation the $\phi(1680)$ meson parameters have been determined with better statistical precision, than in previous studies.

Published
2019
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6. COMET Phase-I Technical Design Report

Author

The COMET Collaboration, Abramishvili, R., Adamov, G., Akhmetshin, R. R., Allin, A., Angélique, J. C., Anishchik, V., Aoki, M., Aznabayev, D., Bagaturia, I., Ban, G., Ban, Y., Bauer, D., Baygarashev, D., Bondar, A. E., Cârloganu, C., Carniol, B., Chau, T. T., Chen, J. K., Chen, S. J., Cheung, Y. E., da Silva, W., Dauncey, P. D., Densham, C., Devidze, G., Dornan, P., Drutskoy, A., Duginov, V., Eguchi, Y., Epshteyn, L. B., Evtoukhovich, P., Fayer, S., Fedotovich, G. V., Finger Jr, M., Finger, M., Fujii, Y., Fukao, Y., Gabriel, J. L., Gay, P., Gillies, E., Grigoriev, D. N., Gritsay, K., Hai, V. H., Hamada, E., Hashim, I. H., Hashimoto, S., Hayashi, O., Hayashi, T., Hiasa, T., Ibrahim, Z. A., Igarashi, Y., Ignatov, F. V., Iio, M., Ishibashi, K., Issadykov, A., Itahashi, T., Jansen, A., Jiang, X. S., Jonsson, P., Kachelhoffer, T., Kalinnikov, V., Kaneva, E., Kapusta, F., Katayama, H., Kawagoe, K., Kawashima, R., Kazak, N., Kazanin, V. F., Kemularia, O., Khvedelidze, A., Koike, M., Kormoll, T., Kozlov, G. A., Kozyrev, A. N., Kravchenko, M., Krikler, B., Kumsiashvili, G., Kuno, Y., Kuriyama, Y., Kurochkin, Y., Kurup, A., Lagrange, B., Lai, J., Lee, M. J., Li, H. B., Litchfield, R. P., Li, W. G., Loan, T., Lomidze, D., Lomidze, I., Loveridge, P., Macharashvili, G., Makida, Y., Mao, Y. J., Markin, O., Matsuda, Y., Melkadze, A., Melnik, A., Mibe, T., Mihara, S., Miyamoto, N., Miyazaki, Y., Idris, F. Mohamad, Azmi, K. A. Mohamed Kamal, Moiseenko, A., Moritsu, M., Mori, Y., Motoishi, T., Nakai, H., Nakai, Y., Nakamoto, T., Nakamura, Y., Nakatsugawa, Y., Nakazawa, Y., Nash, J., Natori, H., Niess, V., Nioradze, M., Nishiguchi, H., Noguchi, K., Numao, T., O'Dell, J., Ogitsu, T., Ohta, S., Oishi, K., Okamoto, K., Okamura, T., Okinaka, K., Omori, C., Ota, T., Pasternak, J., Paulau, A., Picters, D., Ponariadov, V., Quémener, G., Ruban, A. A., Rusinov, V., Sabirov, B., Sakamoto, H., Sarin, P., Sasaki, K., Sato, A., Sato, J., Semertzidis, Y. K., Shigyo, N., Shoukavy, Dz., Slunecka, M., Stöckinger, D., Sugano, M., Tachimoto, T., Takayanagi, T., Tanaka, M., Tang, J., Tao, C. V., Teixeira, A. M., Tevzadze, Y., Thanh, T., Tojo, J., Tolmachev, S. S., Tomasek, M., Tomizawa, M., Toriashvili, T., Trang, H., Trekov, I., Tsamalaidze, Z., Tsverava, N., Uchida, T., Uchida, Y., Ueno, K., Velicheva, E., Volkov, A., Vrba, V., Abdullah, W. A. T. Wan, Warin-Charpentier, P., Wong, M. L., Wong, T. S., Wu, C., Xing, T. Y., Yamaguchi, H., Yamamoto, A., Yamanaka, M., Yamane, T., Yang, Y., Yano, T., Yao, W. C., Yeo, B., Yoshida, H., Yoshida, M., Yoshioka, T., Yuan, Y., Yudin, Yu. V., Zdorovets, M. V., Zhang, J., Zhang, Y., and Zuber, K.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

The Technical Design for the COMET Phase-I experiment is presented in this paper. COMET is an experiment at J-PARC, Japan, which will search for neutrinoless conversion of muons into electrons in the field of an aluminium nucleus ($\mu-e$ conversion, $\mu^- N \to e^- N$); a lepton flavor violating process. The experimental sensitivity goal for this process in the Phase-I experiment is $3.1\times10^{-15}$, or 90 % upper limit of branching ratio of $7\times 10^{-15}$, which is a factor of 100 improvement over the existing limit. The expected number of background events is 0.032. To achieve the target sensitivity and background level, the 3.2 kW 8 GeV proton beam from J-PARC will be used. Two types of detectors, CyDet and StrECAL, will be used for detecting the \mue conversion events, and for measuring the beam-related background events in view of the Phase-II experiment, respectively. Results from simulation on signal and background estimations are also described., Comment: A minor correction applied in Eq. 3

Published
2018
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7. Study of the process $e^+e^- \to K^+K^-$ in the center-of-mass energy range 1010--1060~MeV with the CMD-3 detector

Author

Kozyrev, E. A., Solodov, E. P., 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., Ignatov, F. V., Ivanov, V. L., Karpov, S. V., Kasaev, A. S., Kazanin, V. F., Korobov, A. A., Koop, I. A., Kozyrev, A. N., 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., Talyshev, A. A., Vorobiov, A. I., and Yudin, Yu. V.

Subjects
High Energy Physics - Experiment
Abstract

The process $e^+e^- \to K^+K^-$ has been studied using $1.7 \times 10^6$ 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 measured with an about 2\% systematic uncertainty and it is used to calculate the contribution to the anomalous magnetic moment of the muon $a_{\mu}^{K^+K^-} = (19.33 \pm 0.40) \times 10^{-10}$, and to obtain the $\phi(1020)$ meson parameters. We consider the relationship between the $e^+e^- \to K^+K^-$ and $e^+e^- \to K^0_SK^0_L$ cross sections and compare it to the theoretical expectations.

Published
2017
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8. Study of the Process $e^+e^-\to \pi^+\pi^-\pi^+\pi^-$ 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., Ivanov, V. L., Karpov, S. V., Kasaev, A. S., Kazanin, V. F., Koop, I. A., Kovalenko, O. A., Korobov, A. A., Kozyrev, A. N., Kozyrev, E. A., Krokovny, P. P., Kuzmenko, A. E., Kuzmin, A. S., Logashenko, I. B., Lysenko, A. P., Lukin, P. A., Mikhailov, K. Yu., Okhapkin, V. S., Pestov, Yu. N., Perevedentsev, E. A., 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., Titov, V. M., Talyshev, A. A., Vorobiov, A. I., and Yudin, Yu. V.

Subjects
High Energy Physics - Experiment
Abstract

A cross section of the process $e^+e^- \to \pipi\pipi$ has been measured using 6798$\pm$93 signal events from a data sample corresponding to an integrated luminosity of 9.8 pb$^{-1}$ collected with the CMD-3 detector in the center-of-mass energy range 920--1060 MeV. The measured cross section exhibits an interference pattern of the $\phi(1020)\to\pipi\pipi$ decay with a non-resonant process $e^+e^- \to \pipi\pipi$, from which we obtain the branching fraction of the doubly suppressed decays (by G-parity and OZI rule): $\BR(\phi\to\pipi\pipi) = (6.5\pm2.7\pm1.6)\times 10^{-6}$., Comment: 16 pages, 6 figures

Published
2016
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9. Measurement of the $e^+e^- \to K^+K^-\pi^+\pi^-$ 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., Ivanov, V. L., Karpov, S. V., Kazanin, V. F., Koop, I. A., Korobov, A. A., Kovalenko, O. A., Kozyrev, A. N., Kozyrev, E. A., Krokovny, P. P., Kuzmenko, A. E., Kuzmin, A. S., Logashenko, I. B., Lysenko, A. P., Lukin, P. A., Mikhailov, K. Yu., Okhapkin, V. S., Pestov, Yu. N., Perevedentsev, E. A., Popov, A. S., Razuvaev, G. P., Rogovsky, Yu. A., Ruban, A. A., Ryskulov, N. M., Ryzhenenkov, A. E., Shebalin, V. E., Shwartz, B. A., Shwartz, D. B., Sibidanov, A. L., Shatunov, Yu. M., Solodov, E. P., Titov, V. M., Talyshev, A. A., Vorobiov, A. I., Yudin, Yu. V., and Zemlyansky, I. M.

Subjects
High Energy Physics - Experiment, Nuclear Experiment
Abstract

The process $e^+e^- \to K^+K^-\pi^+\pi^-$ 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 24000 selected events, the $e^+e^- \to K^+K^-\pi^+\pi^-$ 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 $K^+K^-\pi^+\pi^-$ production dynamics has been performed.

Published
2015
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10. Study of the process $e^+e^-\to p\bar{p}$ 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
High Energy Physics - Experiment
Abstract

Using a data sample of 6.8 pb$^{-1}$ collected with the CMD-3 detector at the VEPP-2000 $e^+e^-$ collider we select about 2700 events of the $e^+e^- \to p\bar{p}$ process and measure its cross section at 12 energy ponts with about 6\% systematic uncertainty. From the angular distribution of produced nucleons we obtain the ratio $|G_{E}/G_{M}| = 1.49 \pm 0.23 \pm 0.30$.

Published
2015
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11. Search for the process $e^+e^-\to \eta^\prime(958)$ with the CMD-3 detector

Author

Akhmetshin, R. R., Anisenkov, A. V., Aulchenko, V. M., Banzarov, V. Sh., Bashtovoy, N. S., Berkaeva, 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., Grigoriev, D. N., Gromov, E. N., Ignatov, F. V., Karpov, S. V., Kazanin, V. F., Khazin, B. I., 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., Muchnoi, N. Yu., Okhapkin, V. S., Pestov, Yu. N., Perevedentsev, E. A., Popov, A. S., Razuvaev, G. P., Rogovsky, Yu. A., 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., Titova, V. M., Talyshev, A. A., Vorobiov, A. I., and Yudin, Yu. V.

Subjects
High Energy Physics - Experiment
Abstract

A search for the process $\epem\to \eta^\prime(958)$ in the $\pipi\eta\to\pipi\gamma\gamma$ final state has been performed with the CMD-3 detector at the VEPP-2000 $e^+e^-$ collider. Using an integrated luminosity of 2.69 pb$^{-1}$ collected at the center-of-mass energy \Ecm = 957.68 MeV we set an upper limit for the product of electronic width and branching fractions $\Gamma_{\eta^\prime(958)\to\epem}\cdot\BR_{\eta^\prime(958)\to\pipi\eta}\cdot\BR_{\eta\to\gamma\gamma}<0.00041$ eV at 90\% C.L., Comment: 12 pages, 5 figures, submitted to Physics Letters B

Published
2014
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12. Study of the process $e^+e^-\to 3(\pi^+\pi^-)$ in the c.m.energy range 1.5--2.0 gev with the cmd-3 detector

Author

Collaboration, CMD-3, Akhmetshin, R. R., Anisenkov, A. V., Anokhin, S. A., Aulchenko, V. M., Banzarov, V. S., Barkov, L. M., Bashtovoy, N. S., Berkaev, D. E., Bondar, A. E., Bragin, A. V., Eidelman, S. I., Epifanov, D. A., Epshteyn, L. B., Fedotovich, G. V., Gayazov, S. E., Grebenuk, A. A., Grigoriev, D. N., Gromov, E. N., Ignatov, F. V., Karpov, S. V., Kazanin, V. F., Khazin, B. I., Koop, I. A., Kozyrev, A. N., Krokovny, P. P., Kuzmenko, A. E., Kuzmin, A. S., Logashenko, I. B., Lysenko, A. P., Lukin, P. A., Mikhailov, K. Yu., Pestov, Yu. N., Perevedentsev, E. A., Pirogov, S. A., Pivovarov, S. G., Popov, A. S., Popov, Yu. S., Redin, S. I., Rogovsky, Yu. A., 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., Snopkov, I. G., Solodov, E. P., Titov, V. M., Talyshev, A. A., Vorobiov, A. I., Yudin, Yu. V., and Zaytsev, A. S.

Subjects
High Energy Physics - Experiment
Abstract

The cross section of the process $e^+e^- \to 3(\pi^+\pi^-)$ has been measured using 22 pb$^{-1}$ of integrated luminosity collected with the CMD-3 detector at the VEPP-2000 $e^+e^-$ collider in the c.m. energy range 1.5 -- 2.0 GeV. The measured cross section exhibits a sharp drop near the $p\bar p$ threshold. A first study of dynamics of six-pion production has been performed.

Published
2013

13. Measurement of the $e^+e^-\toπ^+π^-$ cross section from threshold to 1.2 GeV with the CMD-3 detector

Author

3 Collaboration, Ignatov, F. V., 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., Ivanov, V. L., Karpov, S. V., Kasaev, A. S., Kazanin, V. F., Khazin, B. I., Kirpotin, A. N., 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., Obraztsov, I. V., Okhapkin, V. S., Otboev, A. 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., 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., Timoshenko, M. V., Titov, V. M., Tolmachev, S. S., Vorobiov, A. I., Zemlyansky, I. M., Zhadan, D. S., Zharinov, Yu. M., Zubakin, A. S., and Yudin, Yu. V.

Subjects
High Energy Physics - Experiment (hep-ex), FOS: Physical sciences
Abstract

The cross section of the process $e^+e^-\toπ^+π^-$ has been measured in the center of mass energy range from 0.32 to 1.2 GeV with the CMD-3 detector at the electron-positron collider VEPP-2000. The measurement is based on a full dataset collected below 1 GeV during three data taking seasons, corresponding to an integrated luminosity of about 62 pb$^{-1}$. In the dominant $ρ$-resonance region, a systematic uncertainty of 0.7% has been reached. At energies around $ϕ$-resonance the $π^+π^-$ production cross section was measured for the first time with high energy resolution. The forward-backward charge asymmetry in the $π^+π^-$ production has also been measured. It shows the strong deviation from the theoretical prediction based on conventional sQED framework and is in good agreement with GVDM and dispersive-based predictions. The impact of presented results on the evaluation of the hadronic contribution to the anomalous magnetic moment of muon is discussed., 48 pages, 36 figures

Published
2023
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14. The measurement of the omega meson parameters with the CMD-3 detector at the electron-positron collider VEPP-2000

Author

Vasileuskaya, D. S., primary, Grigoriev, D. N., additional, Ivanov, V. L., additional, Kazanin, V. F., additional, Kozyrev, A. N., additional, Ruban, A. A., additional, Ryzhenenkov, A. E., additional, Tolmachev, S. S., additional, Fedotovich, G. V., additional, Shemyakin, D. N., additional, Shoukavy, D. V., additional, and Epshteyn, L. B., additional

Published
2022
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15. 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

Fedotovich, G. V., Erofeev, A. L., Ivanov, V. L., Ryzhenenkov, A. E., Shemyakin, D. N., Anisenkov, A. V., Aulchenko, V. M., Akhmetshin, R. R., Banzarov, V. S., Bashtovoy, N. S., Berkaev, D. E., Bondar, A. E., Bragin, A. V., Vorobiev, A. I., Eidelman, S. I., Epifanov, D. A., Epshteyn, L. B., Gayazov, S. E., Grebenuk, A. A., Gribanov, S. S., Grigoriev, D. N., Ignatov, F. V., Jarinov, Yu. M., Kazanin, V. F., Kasaev, A. S., Karpov, S. V., Kirpotin, A. N., Kovalenko, O. A., Kozyrev, A. N., Kozyrev, E. A., Koop, I. A., Korobov, A. 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., Romanov, A. L., Ruban, A. A., Ryskulov, N. M., Sibidanov, A. L., Solodov, E. P., Talyshev, A. A., Titov, V. M., Shatunov, P. Yu., Shatunov, Yu. M., Shwartz, B. A., Shwartz, D. B., Shebalin, V. E., Yudin, Yu. V., and CMD-3 Collaboration

Published
2017
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16. Measurement of the e + e − → π+π−π0 cross section with the CMD-3 detector

Author

Kovalenko, O. A., 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., Ignatov, F. V., Ivanov, V. L., Karpov, S. V., Kazanin, V. F., Kasaev, A. S., Kovalenko, O. A., 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., 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., Titov, V. M., Talyshev, A. A., Vorobiov, A. I., Yudin, Yu. V., and CMD-3 collaboration

Published
2017
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17. Preliminary results of the cross-section measurement of e+e− → φ(1020)η process with the CMD-3 detector at VEPP-2000 collider

Author

Ivanov, V. L., Akhmetshin, R. R., Amirkhanov, A. N., Anisenkov, A. V., Aulchenko, V. M., Banzarov, V. S., Bashtovoy, N. S., Berkaev, D. 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., Grigoriev, D. N., Gromov, E. M., Ignatov, F. V., Karpov, S. V., Kazanin, V. F., Khazin, B. I., 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., Pestov, Yu. N., Perevedentsev, E. A., Popov, A. S., Razuvaev, G. P., Rogovsky, Yu. A., 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, Yu. M., Shatunov, P. Yu., Solodov, E. P., Titov, V. M., Talyshev, A. A., Vorobiov, A. I., and Yudin, Yu. V.

Published
2016
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18. Barrel calorimeter of the CMD-3 detector

Author

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

Published
2015
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19. Study of π+π−π+π− production with CMD-3 detector at the VEPP-2000 collider

Author

Korobov A. 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., 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., Koop I. A., Kozyrev A. N., Kozyrev E. A., Krokovny P. P., Kuzmenko A. E., Kuzmin A. S., Logashenko I. B., Lysenko A. P., 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., Ryzhenenkov A. E., Semenov A. V., Senchenko A. I., 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., Vorobiov A. I., and Yudin Yu. V.

Subjects
Physics, QC1-999
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
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20. 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

Erofeev A. L., 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., 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., Koop I. A., Korobov A. A., Kozyrev A. N., Kozyrev E. A., Krokovny P. P., Kuzmenko A. E., Kuzmin A. S., Logashenko I. B., Lysenko A. P., 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., Ryzhenenkov A. E., Semenov A. V., Senchenko A. I., 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., Vorobiov A. I., and Yudin Yu. V.

Subjects
Physics, QC1-999
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
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21. Search for the process e+e−→D*(2007) with the CMD-3 detector

Author

Shemyakin D. N., 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., 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., Lysenko A. P., 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., Ryzhenenkov A. E., Semenov A. V., Senchenko A. I., Shatunov Yu. M., Shebalin V. E., Shwartz B. A., Shwartz D. B., Sibidanov A. L., Solodov E. P., Titov V. M., Talyshev A. A., Tolmachev S. S., Vorobiov A. I., and Yudin Yu. V.

Subjects
Physics, QC1-999
Abstract

A search for the process e+e−→ D*0(2007) has been performed with the CMD-3 detector at the VEPP-2000 e+e−-collider. Two main decay modes of the D*0(2007) decay, D0π0 and D0γ, followed by D0 → K+π−π+π−are used in this analysis. With an integrated luminosity of 3.7 pb−1 collected at the center-of-mass energy Ec.m. =2006.62 MeV our preliminary upper limit is BD*0→e+ e−

Published
2019
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22. Study of the process e+e-→π+π-γ with the CMD-3 detector at the e+e- collider VEPP-2000

Author

Tolmachev S. S., 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., Kirpotin A. N., 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., Pestov Yu. N., Popov A. S., Razuvaev G. P., Ruban A. A., Ryskulov N. M., Ryzhenenkov A. E., Semenov A. V., 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 Yudinl Yu. V.

Subjects
Physics, QC1-999
Abstract

Existing Monte-Carlo generators with radiative corrections to the e+e-→π+π- process are usually developed under the assumption that pions can be treated as pointlike particles. We study the e+e-→π+π-γ process with final-state radiation and test this assumption using simulated events from the MCGPJ generator based on the scalar QED hypothesis. In order to increase a fraction of events with FSR, the analysis was performed in the energy region to the left from the ρ-meson peak (660÷785 MeV) that is based on the integrated luminosity of about 8.4 pb-1. The experimental data for the photon energy spectrum agree with the simulation results at 1% level.

Published
2019
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23. The NNbar and multihadron production at the threshold at VEPP2000

Author

Solodov E. P., 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., Pestov Yu. N., Popov A. S., Razuvaev G. P., Rogovsky Yu. A., Ruban A. A., Ryskulov N. M., Ryzhenenkov A. E., Semenov A. V., Shatunov Yu. M., Shatunov P. Yu., Shebalin V. E., Shemyakin D. N., Shwartz B. A., Shwartz D. B., Sibidanov A. L., Titov V. M., Talyshev A. A., Vorobiov A. I., Zemlyansky I. M., and Yudin Yu. V.

Subjects
Physics, QC1-999
Abstract

A study of hadron production at the nucleon-antinucleon threshold has been performed with the CMD-3 detector at the VEPP-2000 e+e− collider. A very fast rise with an about 1 MeV width has been observed in the e+e−→ pp̅ cross section. A sharp drop in the e+ e−→ 3(π+π−) cross section has been con?rmed and found to have a width of less than 2 MeV, in agreement with the observed fast rise of the e+e−→ pp̅ cross section. For the ?rst time a similar sharp drop is demonstrated in the e+e−→ K+ K−π+π− cross section. The behavior of the e+e−→ 3(π+ π−), K+ K−π+π− cross sections cannot be explained by an interference of any resonance amplitude with continuum, therefore this phenomenon cannot be due to a narrow near-threshold resonance. No such structure has been observed in the e+e−→ 2(π+π−) cross section.

Published
2019
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24. Recent results from CMD-3

Author

Ignatov F. 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., Fedotovich G. V., Gayazov S. E., Grebenuk A. A., Gribanov S. S., Grigoriev D. N., 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., Pestov Yu. N., Popov A. S., Razuvaev G. P., Rogovsky Yu. A., Ruban A. A., Ryskulov N. M., Ryzhenenkov A. E., Semenov A. V., 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.

Subjects
Physics, QC1-999
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
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25. Study of the e+e−→ KS KLπ0 process up to 2 GeV with the CMD-3 detector at the VEPP-2000 collider

Author

Semenov A. 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., 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., Pestov Yu. N., Popov A. S., Razuvaev G. P., Rogovsky Yu. A., Ruban A. A., Ryskulov N. M., Ryzhenenkov A. E., 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.

Subjects
Physics, QC1-999
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
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26. 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

Kozyrev E. 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., 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., 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., Rogovsky Yu. A., Ruban A. A., Ryskulov N. M., Ryzhenenkov A. E., Semenov A. V., 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.

Subjects
Physics, QC1-999
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
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27. Recent results of the hadronic cross section measurements with the CMD-3 detector at e+e− collider VEPP-2000

Author

Fedotovich G. V., Akhmetshin R. R., Amirkhanov A. N., Anisenkov A. V., 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., Kazanin V. F., Kirpotin A. N., 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., Peatov Yu. N., Popov A. S., Razuvaev G. P., Ruban A. A., Ryskulov N. M., Ryzhenenkov A. E., Stnchenko 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., Titov V. M., Tolmachev S. S., Vorobiov A. I., Zemlyansky I. M., and Yudin Yu. V.

Subjects
Physics, QC1-999
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
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28. Preliminary results of measurements of hadronic cross sections with the CMD-3 detector at the VEPP-2000 electron–positron collider

Author

Fedotovich, G. V., Anisenkov, A. V., Aulchenko, V. M., Akhmetshin, R. R., Banzarov, V. S., Bashtovoy, N. S., Berkaev, D. E., Bragin, A. V., Vorobiov, A. I., Gayazov, S. E., Grebenuk, A. A., Grigoriev, D. N., Gromov, E. M., Epifanov, D. A., Erofeev, A. L., Zharinov, Yu. M., Ivanov, V. L., Ignatov, F. V., Kazanin, V. F., Karpov, S. V., Kirpotin, A. N., Kovalenko, O. A., Kozyrev, A. N., Kozyrev, E. A., Koop, I. 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., Romanov, A. L., Ruban, A. A., Ryzhenenkov, A. E., Ryskulov, N. M., Sibidanov, A. L., Solodov, E. P., Talyshev, A. A., Titov, V. M., Khazin, B. I., Shatunov, P. Yu., Shatunov, Yu. M., Shwartz, B. A., Shwartz, D. B., Shebalin, V. E., Shemyakin, D. N., Eidelman, S. I., Epshteyn, L. B., and Yudin, Yu. V.

Published
2015
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29. 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

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

Published
2015
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30. Investigation of the process e + e − → K + K − with the aid of the CMD-3 detector at the VEPP-2000 electron-positron collider

Author

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

Published
2015
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32. Overview of the CMD-3 recent results at e+e− collider VEPP-2000

Author

Fedotovich G. V., Akhmetshin R. R., Anisenkov A. V., Aulchenko V. M., Banzarov V. S., Bashtovoy N. S., Berkaev D. E., Bragin A. V., Eidelman S. I., Epifanov D. A., Epshteyn L. B., Erofeev A. L., Gayazov S. E., Grebenuk A. A., Grigoriev D. N., Gromov E. M., Ignatov F. V., Ivanov V. L., Karpov S. V., 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., Lysenko A. P., Mikhailov K. Yu., Okhapkin V. S., Pestov Yu. N., Perevedentsev E. A., Popov A. S., Razuvaev G. P., Rogovsky Yu. A., 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
Physics, QC1-999
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
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33. Study of the process e + e– → π+ π– π0 with the CMD-3 detector at the electron-positron collider VEPP-2000

Author

Vasileuskaya, D. S., primary, Grigoriev, D. N., additional, Dudko, I. G., additional, Ivanov, V. L., additional, Kazanin, V. F., additional, Kozyrev, A. N., additional, Ruban, A. A., additional, Ryzhenenkov, A. E., additional, Tolmachev, S. S., additional, Fedotovich, G. V., additional, Shemyakin, D. N., additional, Shoukavy, D. V., additional, and Epshteyn, L. B., additional

Published
2020
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34. Study of the process e + e − → KSK ± π ∓ with CMD-3 detector

Author

Uskov, A A, primary, Fedotovich, G V, additional, Ivanov, V L, 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, Gayazov, S E, additional, Gerasimov, R E, additional, Grebenuk, A A, additional, Gribanov, S S, additional, Grigoriev, D N, additional, Ignatov, F V, 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, 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, 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, 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
2020
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35. Production of four charged pions with the CMD-3 detector at the VEPP-2000 collider

Author

Korobov, A. A., 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, Kasaev, A. S., additional, Kazanin, V. F., additional, Koop, I. 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, Otboev, A. V., 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, Senchenko, A. I., 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
2020
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36. Intermediate dynamics of the four pions production in $e^+e^-$ annihilation and tau decay processes

Author

Kozyrev, E A, 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, A D, 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, 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, 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, Shatunov, Yuri 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
2020
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37. Overview of the CMD-3 recent results

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, 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, 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, Talyshev, A A, additional, Tolmachev, S S, additional, Vorobiov, A I, additional, and Yudin, Yu V, additional

Published
2020
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38. Study of the process $e^+e^-{\to}K^+K^-��$ 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.

Subjects
High Energy Physics - Experiment (hep-ex), FOS: Physical sciences
Abstract

The process $e^+e^-{\to}K^+K^-��$ 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 $K^+K^-��$ final state is found to be dominated by the contribution of the $��(1020)��$ intermediate state. The cross section of the process $e^+e^-{\to}��(1020)��$ has been measured with a systematic uncertainty of 5.1$\%$ on the base of 3009 $\pm$ 67 selected events. The obtained cross section has been used to calculate the contribution to the anomalous magnetic moment of the muon: $a_��^{����}(E

Published
2019
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40. Experimental input from $e^+e^-$ machines to hadronic contribution to muon (g-2)

Author

Achasov, M. N., primary, Akhmetshin, R. R., additional, Amirkhanov, A. N., additional, Anisenkov, A. V., additional, Aulchenko, V. M., additional, Banzarov, V. Sh., additional, Barnyakov, A. Yu., additional, Bashtovoy, N. S., additional, Beloborodov, K. I., additional, Berdyugin, A. V., additional, Berkaev, D. E., additional, Bogdanchikov, A. G., additional, Bondar, A. E., additional, Botov, A. A., additional, Bragin, A. V., additional, Dimova, T. V., additional, Druzhinin, V. P., 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, Golubev, V. B., additional, Grebenuk, A. A., additional, Gribanov, S. S., additional, Grigoriev, D. N., additional, Ignatov, F. V., additional, Ivanov, V. L., additional, Kardapoltsev, L. V., additional, Karpov, S. V., additional, Kazanin, V. F., additional, Kharlamov, A. G., additional, Kirpotin, A. N., additional, Koop, I. A., additional, Korol, A. A., additional, Korobov, A. A., additional, Koshuba, S. V., additional, Kozyrev, A. N., additional, Kozyrev, E. A., additional, Kovrizhin, Dmitry, additional, Krokovny, P. P., additional, Kupich, A. S., additional, Kuzmenko, A. E., additional, Kuzmin, A. S., additional, Litvinov, R. A., additional, Logashenko, I. B., additional, Lukin, P. A., additional, Martin, K. A., additional, Melnikova, N. A., additional, Mikhailov, K. Yu., additional, Obrazovsky, A. E., additional, Okhapkin, V. S., additional, Otboev, A. V., additional, Pakhtusova, E. V., additional, Pestov, Yu. N., additional, Popov, A. S., additional, Pugachev, K. V., additional, Razuvaev, G. P., additional, Ruban, A. A., additional, Ryskulov, N. M., additional, Ryzhenenkov, A. E., additional, Senchenko, A. I., additional, Serednyakov, Sergey, additional, Shatunov, Yu. M., additional, Shatunov, P. Yu., additional, Shebalin, V. E., additional, Shemyakin, D. N., additional, Shtol, D. A., additional, Shwartz, Boris, additional, Shwartz, D. B., additional, Sibidanov, A. L., additional, Silagadze, Z. K., additional, Solodov, E. P., additional, Surin, I. K., 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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41. Current Status of Luminosity Measurement with the CMD-3 Detector at the VEPP-2000 e + e − Collider

Author

Ryzhenenkov, A E, 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, 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, Korobov, A 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, Pestov, Yu N, Popov, A S, Razuvaev, G P, Ruban, A A, Ryskulov, N M, Shebalin, V E, Shemyakin, D N, Shwartz, B A, Sibidanov, A L, Solodov, E P, Talyshev, A A, Titov, V M, Vorobiov, A I, and Yudin, Yu V

Subjects
Luminosity, VEPP-2000, CMD-3 detector, Astrophysics::High Energy Astrophysical Phenomena, Physics::Accelerator Physics, High Energy Physics::Experiment, Astrophysics::Cosmology and Extragalactic Astrophysics, Detectors and Experimental Techniques, Astrophysics::Galaxy Astrophysics
Abstract

The CMD-3 detector has taken data at the electron-positron collider VEPP-2000 since december 2010. The collected data sample corresponds to an integrated luminosity of 60 pb-6 in the c.m. energy range from 0.32 up to 2 GeV. Preliminary results of the luminosity measurement are presented for various energy ranges and its accuracy is estimated to be 1%., CERN Proceedings, Vol 1 (2017): CERN-BINP Workshop for Young Scientists in e+e- Colliders

Published
2017
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42. The CMD-3 Data Acquisition System

Author

Kozyrev, A N, Aulchenko, V M, Epifanov, D A, Epshteyn, L B, Logashenko, I B, Mikhailov, K Yu, Popov, A S, Ruban, A A, Selivanov, A N, Talyshev, A A, Titov, V M, and Yudin, Y V

Subjects
Detectors and Experimental Techniques, Data acquisition, signal processing, fast electronics, trigger, digitizer
Abstract

The specialized data acquisition system designed for CMD-3 detector which is installed at the electron-positron collider VEPP-2000 to the Budker Institute of Nuclear Physics, Novosibirsk, Russia. The structure of electronic hardware and firmware is described., CERN Proceedings, Vol 1 (2017): CERN-BINP Workshop for Young Scientists in e+e- Colliders

Published
2017
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43. Kaon Identification using the Tracking System of the CMD-3 Detector

Author

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, 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, Korobov, A 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, Pestov, Yu N, Popov, A S, Razuvaev, G P, Ruban, A A, Ryskulov, N M, Ryzhenenkov, A E, Shebalin, V E, Shemyakin, D N, Shwartz, B A, Sibidanov, A L, Solodov, E P, Talyshev, A A, Titov, V M, Vorobiov, A I, and Yudin, Yu V

Subjects
Detectors and Experimental Techniques, Drift chamber, Ionisation losses calibration, VEPP-2000, CMD-3 detector
Abstract

This paper describes the K/ϖ separation technique based on ionisation losses in the drift chamber of the CMD-3 detector. First the procedure of the ionisationloss calibration is described. Then methods of K/ϖ separation are discussed for the example process e+e- → K+K-ϖ+ϖ-., CERN Proceedings, Vol 1 (2017): CERN-BINP Workshop for Young Scientists in e+e- Colliders

Published
2017
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44. Charged Particle Identification using the Liquid Xenon Calorimeter of the CMD-3 Detector

Author

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, 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, Korobov, A 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, Pestov, Yu N, Popov, A S, Razuvaev, G P, Ruban, A A, Ryskulov, N M, Ryzhenenkov, A E, Shebalin, V E, Shemyakin, D N, Shwartz, B A, Sibidanov, A L, Solodov, E P, Talyshev, A A, Titov, V M, Vorobiov, A I, and Yudin, Yu V

Subjects
Physics::Instrumentation and Detectors, Particle identification, specific energy losses, boosted decision trees, High Energy Physics::Experiment, Detectors and Experimental Techniques
Abstract

This paper describes a currently being developed procedure of the charged particle identification for CMD-3 detector, installed at the VEPP-2000 collider. The procedure is based on the application of the boosted decision trees classification method, and uses as input variables, among others, the specific energy losses of charged particle in the layers of the liquid Xenon calorimeter. The efficiency of the procedure is demonstrated by an example of the extraction of events of e+e- to K+K- process in the center of mass energy range from 1.8 to 2.0 GeV., CERN Proceedings, Vol 1 (2017): CERN-BINP Workshop for Young Scientists in e+e- Colliders

Published
2017
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45. Calorimetry at the CMD-3 Detector

Author

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

Subjects
Physics::Instrumentation and Detectors, Calorimetry, liquid xenon, scintillation crystals, High Energy Physics::Experiment, Detectors and Experimental Techniques, Nuclear Experiment
Abstract

The general purpose detector CMD-3 has been collecting data since 2010 in an energy range 0.32–2 GeV at the e+e- collider VEPP-2000 at the Budeker Institute of Nuclear Physics. The detector physics program includes the study of the e+e- annihilation into hadrons. To supply high registration efficiency for neutral particles the CMD-3 has an electromagnetic calorimeter consisted of three subsystems: BGO endcap calorimeter and barrel one with an inner part based on LXe and outer on CsI crystals. The main parameters of calorimeters, cluster reconstruction and calibration procedures with performance results are described., CERN Proceedings, Vol 1 (2017): CERN-BINP Workshop for Young Scientists in e+e- Colliders

Published
2017
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46. The Study of the Conversion Decays of Omega Meson to π0 Meson and e+ e− Pair with the CMD-3 Detector

Author

Akhmetshin, R R, Amirkhanov, A N, Anisenkov, A V, Aulchenko, V M, Banzarov, V S, Bashtovoy, N S, 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, Korobov, A 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 Y, Okhapkin, V S, Pestov, Y N, Popov, A S, Razuvaev, G P, Ruban, A A, Ryskulov, N M, Ryzhenenkov, A E, Shebalin, V E, Shemyakin, D N, Shwartz, B A, Sibidanov, A L, Solodov, E P, Talyshev, A A, Titov, V M, Vorobiov, A I, and Yudin, Y V

Subjects
Conversion decay, close tracks, vertex, Particle Physics - Experiment
Abstract

The conversion decay ω → π0 e+ e− was studied in the center-of-mass energy range 760 – 840 MeV using about 8 pb −1 of data collected with the CMD-3 detector at the VEPP-2000 e + e − collider in Novosibirsk. The visible cross section of the process ω → π0 e+ e− was measured. The current status of the analysis is presented., CERN Proceedings, Vol 1 (2017): CERN-BINP Workshop for Young Scientists in e+e- Colliders

Published
2017

47. Measurement of the e+e−→ ηπ+π− cross section with the CMD-3 detector at the VEPP-2000 collider.

Author

Gribanov, S. S., Popov, A. S., 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., and Grigoriev, D. N.

Abstract

The cross section of the process e+e−→ ηπ+π− is measured using the data collected with the CMD-3 detector at the VEPP-2000 collider in the center-of-mass energy range from 1.1 to 2.0 GeV. The decay mode η → γγ is used for η meson reconstruction in the data sample corresponding to an integrated luminosity of 78.3 pb−1. The energy dependence of the e+e−→ ηπ+π− cross section is fitted within the framework of vector meson dominance in order to extract the Γ(ρ(1450) → e+e−) B (ρ(1450) → ηπ+π−) and the Γ(ρ(1700) → e+e−) B (ρ(1700) → ηπ+π−) products. Based on conservation of vector current, the analyzed data are used to test the relationship between the e+e−→ ηπ+π− cross section and the spectral function in τ−→ ηπ−π0ντ decay. The e+e−→ ηπ+π− cross section obtained with the CMD-3 detector is in good agreement with the previous measurements. [ABSTRACT FROM AUTHOR]

Published
2020
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48. Study of the process e+e-→π+π-γ with the CMD-3 detector at the e+e- collider VEPP-2000.

Author

Tolmachev, S. S., 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., and Ignatov, F. V.

Subjects
ELECTRON-electron interactions, NUCLEAR counters, PIONS, NUCLEAR energy, NUCLEAR physics experiments
Abstract

Existing Monte-Carlo generators with radiative corrections to the e+e-→π+π- process are usually developed under the assumption that pions can be treated as pointlike particles. We study the e+e-→π+π-γ process with final-state radiation and test this assumption using simulated events from the MCGPJ generator based on the scalar QED hypothesis. In order to increase a fraction of events with FSR, the analysis was performed in the energy region to the left from the ρ-meson peak (660÷785 MeV) that is based on the integrated luminosity of about 8.4 pb-1. The experimental data for the photon energy spectrum agree with the simulation results at 1% level. [ABSTRACT FROM AUTHOR]

Published
2019
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49. Study of π+π−π+π− production with CMD-3 detector at the VEPP-2000 collider.

Author

Korobov, A. 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., Epshteyn, L. B., Erofeev, A. L., Fedotovich, G. V., Gayazov, S. E., Grebenuk, A. A., Gribanov, S. S., Grigoriev, D. N., and Ignatov, F. V.

Subjects
NUCLEAR cross sections, MUON decay, NUCLEAR energy, MUON detection, MAGNETIC moments
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). [ABSTRACT FROM AUTHOR]

Published
2019
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50. Study of the e+e−→ KS KLπ0 process up to 2 GeV with the CMD-3 detector at the VEPP-2000 collider.

Author

Semenov, A. 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., Fedotovich, G. V., Gayazov, S. E., Grebenuk, A. A., Gribanov, S. S., Grigoriev, D. N., and Ignatov, F. V.

Subjects
COLLIDERS (Nuclear physics), NUCLEAR cross sections, NUCLEAR counters, SPECIAL relativity (Physics), NUCLEAR energy
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. [ABSTRACT FROM AUTHOR]

Published
2019
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