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23 results on '"Tolmachev, S. S."'

2. 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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3. 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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4. 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

5. 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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6. 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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7. 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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8. Study of the with the CMD-3 Detector at the VEPP-2000.

Author

Tolmachev, S. S.

Abstract

We present preliminary results of the cross-section measurement of the process based on an integrated luminosity of about 51.4 pb collected with the CMD-3 detector at the VEPP-2000 collider in the center-of-mass energy region below 1 GeV. A systematic uncertainty of the measurement is estimated as . The measured cross-section is analyzed in the framework of the vector meson dominance model taking into account an interference of the resonances. The preliminary parameters for the and resonances are obtained. [ABSTRACT FROM AUTHOR]

Published
2024
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9. 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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11. 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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12. 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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13. 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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14. 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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15. 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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17. 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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19. 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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20. 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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21. 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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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., 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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23. Upgrade of the CMD-3 TOF system

Author

Fedotovich, G V, primary, Kozyrev, A N, additional, Kulidzhoglyan, V A, additional, Ruban, A A, additional, Ryskulov, N M, additional, Ryzhenenkov, A E, additional, Shemyakin, D N, additional, and Tolmachev, S S, additional

Published
2014
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