Search

Your search keyword '"Bondar, A. E."' showing total 518 results
Start Over Author "Bondar, A. E."
518 results on '"Bondar, A. E."'

1. Neue Wege in der interdisziplinären Fließgewässerforschung – Vorstellung des FWF-Doktoratsprogramms „Industrialisierte Flusslandschaften“ im Rahmen der Doktoratsschule HR21 an der BOKU Wien

Author

Hein, T., Bondar-Kunze, E., Ertl, T., Graf, W., Habersack, H., Haidvogl, G., Hauer, C., Hood-Nowotny, R., Laaha, G., Mehdi-Schulz, B., Mitter, H., Schinegger, R., Schmid, E., Schmid, M., Schmutz, S., Seher, W., Stockinger, M., Stöglehner, G., Stumpp, C., Weigelhofer, G., and Langergraber, G.

Published
2024
Full Text
View/download PDF

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
Full Text
View/download PDF

3. Coupled channels and production of near-threshold $B^{(*)}\bar{B}^{(*)}$ resonances in $e^{+}e^{-}$ annihilation

Author

Salnikov, S. G., Bondar, A. E., and Milstein, A. I.

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Experiment
Abstract

The effects of final-state interaction of hadrons, produced in $e^{+}e^{-}$ annihilation near the threshold, are discussed. If there is a loosely bound state or a virtual state in a system of produced hadrons, then the energy dependence of hadroproduction cross section is very strong. Our approach is based on the use of the effective potentials accounting for the interaction between hadrons in the final state. The cases of a few channels with nonzero transition amplitudes between them are considered. It is shown that these transitions drastically change the energy dependence of the cross sections. In particular, a narrow resonance below the threshold in one channel leads to a broad peak in another channel. We explained the non-trivial energy dependence of the production cross sections of $B\bar{B}$, $B^{*}\bar{B}$, $B\bar{B}^{*}$, $B^{*}\bar{B}^{*}$ near the thresholds in $e^{+}e^{-}$ annihilation and obtained good agreement between our predictions and the experimental data available., Comment: 15 pages, 11 figures

Published
2023
Full Text
View/download PDF

4. 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
Full Text
View/download PDF

5. Measurement of the branching fraction of $J/\psi\rightarrow\rho\pi$ at KEDR

Author

Anashin, V. V., Anchugov, O. V., Andrianov, A. V., Astrelina, K. V., Aulchenko, V. M., Baldin, E. M., Baranov, G. N., Barladyan, A. K., Barnyakov, A. Yu., Barnyakov, M. Yu., Basok, I. Yu., Batrakov, A. M., Bekhtenev, E. A., Belikov, O. V., Berkaev, D. E., Blinov, A. E., Blinov, V. E., Blinov, M. F., Bobrov, A. V., Bobrovnikov, V. S., Bogomyagkov, A. V., Bolkhovityanov, D. Yu., Bondar, A. E., Buzykaev, A. R., Cheblakov, P. B., Dorohov, V. L., Emanov, F. A., Gambaryan, V. V., Grigoriev, D. N., Kaminskiy, V. V., Karnaev, S. E., Karpov, G. V., Karpov, S. V., Karukina, K. Yu., Kashtankin, D. P., Kasyanenko, P. V., Katcin, A. A., Kharlamova, T. A., Kiselev, V. A., Kononov, S. A., Krasnov, A. A., Kravchenko, E. A., Kudryavtsev, V. N., Kulikov, V. F., Kuyanov, I. A., Levichev, E. B., Logachev, P. V., Maksimov, D. A., Maltseva, Yu. I., Malyshev, V. M., Maslennikov, A. L., Meshkov, O. I., Mishnev, S. I., Morozov, I. A., Morozov, I. I., Nikiforov, D. A., Nikitin, S. A., Nikolaev, I. B., Okunev, I. N., Oreshkin, S. B., Osipov, A. A., Ovtin, I. V., Pavlenko, A. V., Peleganchuk, S. V., Piminov, P. A., Podgornov, N. A., Prisekin, V. G., Rezanova, O. L., Ruban, A. A., Savinov, G. A., Shamov, A. G., Shekhtman, L. I., Shvedov, D. A., Shwartz, B. A., Simonov, E. A., Sinyatkin, S. V., Skrinsky, A. N., Sokolov, A. V., Starostina, E. V., Sukhanov, D. P., Sukharev, A. M., Talyshev, A. A., Tayursky, V. A., Telnov, V. I., Tikhonov, Yu. A., Todyshev, K. Yu., Tribendis, A. G., Tumaikin, G. M., Usov, Yu. V., Vorobiov, A. I., Zhilich, V. N., Zhukov, A. A., Zhulanov, V. V., and Zhuravlev, A. N.

Subjects
High Energy Physics - Experiment
Abstract

We present the study of the decay $J/\psi \rightarrow \rho\pi$. The results are based on of 5.2~million $J/\psi$ events collected by the KEDR detector at the VEPP-4M collider. The branching fractions are measured to be $\B(J/\psi \rightarrow \rho\pi) = \big(2.072\pm 0.017 \pm 0.062 \big)\cdot 10^{-2}$ and $\B(J/\psi \rightarrow \pi^+\pi^-\pi^0) = \big(1.878 \pm 0.013 \pm 0.051 \big)\cdot 10^{-2}$, where the first uncertainties are statistical and the second systematic. Our results are more precise than the previous relative measurements.

Published
2022
Full Text
View/download PDF

6. Effects of isospin violation in the $e^+e^- \rightarrow B^{(*)}\bar B^{(*)}$ cross sections

Author

Bondar, A. E., Milstein, A. I., Mizuk, R. V., and Salnikov, S. G.

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Experiment
Abstract

Model estimates are obtained for the influence of Coulomb effects on the ratio of the cross sections for the production of charged and neutral $B\bar B$ and $B^*\bar B^*$ pairs in $e^+e^-$ annihilation. It is shown that the difference between the masses of charged and neutral mesons obtained under the assumption that this ratio is constant on a scale of the order of the beam energy spread can differ from the true one by $\delta M \sim 0.03\,\mbox{MeV}$ at the energy of $\Upsilon (5S)$ and by $\delta M \sim 0.4\,\mbox{MeV}$ at the energy of $\Upsilon (4S)$. Thus, the errors given in the PDG for the difference between the masses of charged and neutral $B$ mesons, based on the results obtained at the energy of $\Upsilon (4S)$, are strongly underestimated. Similar measurements at the energy of $\Upsilon (5S)$ will have an order of magnitude smaller systematic shift for the mass difference. This circumstance should be taken into account when planning future experiments at the $B$ factory in KEK., Comment: 6 pages, 2 figures

Published
2022
Full Text
View/download PDF

8. X-ray signature of antistars in the Galaxy

Author

Bondar, A. E., Blinnikov, S. I., Bykov, A. M., Dolgov, A. D., and Postnov, K. A.

Subjects
Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

The existence of macroscopic objects from antimatter (antistars) is envisaged in some models of baryogenesis. Searches for antistars has been usually carried out in gamma-rays through hadronic annihilation of matter. In astrophysically plausible cases of the interaction of neutral atmospheres or winds from antistars with ionized interstellar gas, the hadronic annihilation will be preceded by the formation of excited $p\bar p$ and He$\bar p$ atoms. These atoms rapidly cascade down to low levels prior to annihilation giving rise to a series of narrow lines which can be associated with the hadronic annihilation gamma-ray emission. The most significant are L (3p-2p) 1.73 keV line (yield more than 90\%) from $p\bar p$ atoms, and M (4-3) 4.86 keV (yield $\sim 60\% $) and L (3-2) 11.13 keV (yield about 25\%) lines from $^4$He$\bar p$ atoms. These lines can be probed in dedicated observations by forthcoming sensitive X-ray spectroscopic missions XRISM, \textit{Athena, \textit{Lynx}and in wide-field X-ray surveys like SRG/\textit{eROSITA} all-sky survey., Comment: 13 pages, 1 figure, 2 tables. Submitted to JCAP. Revised version, typos corrected

Published
2021
Full Text
View/download PDF

10. Experiments with the KEDR Detector at the \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${{e}^{ + }}{{e}^{ - }}$$\end{document} \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\sqrt s $$\end{document} Collider VEPP-4M in the Energy Range \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${{e}^{ + }}{{e}^{ - }}$$\end{document} \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\sqrt s $$\end{document} = 1.84–3.88 GeV

Author

Anashin, V. V., Anchugov, O. V., Aulchenko, V. M., Balashov, S. A., Baldin, E. M., Baranov, G. N., Barladyan, A. K., Barnyakov, A. Yu., Barnyakov, M. Yu., Baru, S. E., Basok, I. Yu., Batrakov, A. M., Bedny, I. V., Bekhtenev, E. A., Blinov, A. E., Blinov, V. E., Bobrov, A. V., Bobrovnikov, V. S., Bogomyagkov, A. V., Bondar, A. E., Bondarev, D. V., Buzykaev, A. R., Cheblakov, P. B., Cherepanov, V. P., Dorohov, V. L., Eidelman, S. I., Glukhov, S. A., Gluchovchenko, Yu. M., Grigoriev, D. N., Groshev, V. R., Gulevich, V. V., Gusev, D. V., Kaminskiy, V. V., Karnaev, S. E., Karpov, G. V., Karpov, S. V., Karyukina, K. Yu., Kashtankin, D. P., Kasyanenko, P. V., Katcin, A. A., Kharlamova, T. A., Kiselev, V. A., Kolmogorov, V. V., Kononov, S. A., Kotov, K. A., Kotov, K. Yu., Krasnov, A. A., Kravchenko, E. A., Kudryavtsev, V. N., Kulikov, V. F., Kurkin, G. Ya., Kuyanov, I. A., Levichev, E. B., Maksimov, D. A., Malyshev, V. M., Maslennikov, A. L., Medvedko, A. S., Meshkov, O. I., Mishnev, S. I., Morozov, I. A., Morozov, I. I., Muchnoi, N. Yu., Naumenkov, A. I., Neufeld, V. V., Nikitin, S. A., Nikolaev, I. B., Okunev, I. N., Onuchin, A. P., Oreshkin, S. B., Orlov, I. O., Osipov, A. A., Ovtin, I. V., Pakhotin, Yu. A., Peleganchuk, S. V., Petrosyan, S. S., Petrov, V. V., Piminov, P. A., Pivovarov, S. G., Podgornov, N. A., Poluektov, A. O., Polunin, A. A., Popkov, I. N., Pospelov, G. E., Protopopov, I. Ya., Prisekin, V. G., Rezanova, O. L., Ruban, A. A., Sandyrev, V. K., Savinov, G. A., Shamov, A. G., Shatilov, D. N., Shekhtman, L. I., Shubin, E. I., Shvedov, D. A., Shwartz, B. A., Sidorov, V. A., Simonov, E. A., Sinyatkin, S. V., Skrinsky, A. N., Smaluk, V. V., Sokolov, A. V., Starostina, E. V., Struchalin, M. V., Sukhanov, D. P., Sukharev, A. M., Talyshev, A. A., Tayursky, V. A., Telnov, V. I., Tikhonov, Yu. A., Todyshev, K. Yu., Tribendis, A. G., Tumaikin, G. M., Usov, Yu. V., Vorobiov, A. I., Zatsepin, A. V., Zhilich, V. N., Zhukov, A. A., Zhulanov, V. V., Zhuravlev, A. N., and Yushkov, A. N.

Published
2023
Full Text
View/download PDF

11. Charge asymmetry in decays $ B\rightarrow D\bar DK$

Author

Bondar, A. E. and Milstein, A. I.

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Experiment
Abstract

We discusses the charge asymmetry in $ B\rightarrow D\bar DK$ decays with an invariant mass of the $D\bar D$ pair near the $\Psi(3770)$ resonance. Unlike $ \Psi (3770) $ decays in $ e^+e^- $ annihilation, in $B^+$ decays the probability of $D^0\bar D^0$ production is almost three times higher than $D^+ D^-$. In $B^0$ decays, the ratio of these probabilities will be opposite. The effect is explained by the fact that, in $B$ -meson decays, the $D\bar D$ pair is produced in a superposition of isoscalar and isovector states, and only in combination with $K$ -mesons the total state has $ 1/2 $ isospin. We present a simple model in which the interference of the nonresonant isovector amplitude with the resonant isoscalar amplitude explains the experimental data., Comment: 11 pages, 7 figures, version submitted to JHEP

Published
2020
Full Text
View/download PDF

12. 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

13. 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
Full Text
View/download PDF

14. 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
Full Text
View/download PDF

15. Measurement of the branching fraction of J/ψ → ρπ at KEDR

Author

Anashin, V. V., Anchugov, O. V., Andrianov, A. V., Astrelina, K. V., Aulchenko, V. M., Baldin, E. M., Baranov, G. N., Barladyan, A. K., Barnyakov, A. Yu., Barnyakov, M. Yu., Basok, I. Yu., Batrakov, A. M., Bekhtenev, E. A., Belikov, O. V., Berkaev, D. E., Blinov, A. E., Blinov, V. E., Blinov, M. F., Bobrov, A. V., Bobrovnikov, V. S., Bogomyagkov, A. V., Bolkhovityanov, D. Yu., Bondar, A. E., Buzykaev, A. R., Cheblakov, P. B., Dorohov, V. L., Emanov, F. A., Gambaryan, V. V., Grigoriev, D. N., Kaminskiy, V. V., Karnaev, S. E., Karpov, G. V., Karpov, S. V., Karukina, K. Yu., Kashtankin, D. P., Kasyanenko, P. V., Katcin, A. A., Kharlamova, T. A., Kiselev, V. A., Kononov, S. A., Krasnov, A. A., Kravchenko, E. A., Kudryavtsev, V. N., Kulikov, V. F., Kuyanov, I. A., Levichev, E. B., Logachev, P. V., Maksimov, D. A., Maltseva, Yu. I., Malyshev, V. M., Maslennikov, A. L., Meshkov, O. I., Mishnev, S. I., Morozov, I. A., Morozov, I. I., Nikiforov, D. A., Nikitin, S. A., Nikolaev, I. B., Okunev, I. N., Oreshkin, S. B., Osipov, A. A., Ovtin, I. V., Pavlenko, A. V., Peleganchuk, S. V., Piminov, P. A., Podgornov, N. A., Prisekin, V. G., Rezanova, O. L., Ruban, A. A., Savinov, G. A., Shamov, A. G., Shekhtman, L. I., Shvedov, D. A., Shwartz, B. A., Simonov, E. A., Sinyatkin, S. V., Skrinsky, A. N., Sokolov, A. V., Starostina, E. V., Sukhanov, D. P., Sukharev, A. M., Talyshev, A. A., Tayursky, V. A., Telnov, V. I., Tikhonov, Yu. A., Todyshev, K. Yu., Tribendis, A. G., Tumaikin, G. M., Usov, Yu. V., Vorobiov, A. I., Zhilich, V. N., Zhukov, A. A., Zhulanov, V. V., and Zhuravlev, A. N.

Published
2023
Full Text
View/download PDF

16. 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
Full Text
View/download PDF

18. New approaches in interdisciplinary river science—Presentation of the new PhD program “Industrialized Riverine Landscapes” within the Doctoral School HR21 at BOKU University

Author

Hein, T., primary, Bondar-Kunze, E., additional, Ertl, T., additional, Graf, W., additional, Habersack, H., additional, Haidvogl, G., additional, Hauer, C., additional, Hood-Nowotny, R., additional, Laaha, G., additional, Mehdi-Schulz, B., additional, Mitter, H., additional, Schinegger, R., additional, Schmid, E., additional, Schmid, M., additional, Schmutz, S., additional, Seher, W., additional, Stockinger, M., additional, Stöglehner, G., additional, Stumpp, C., additional, Weigelhofer, G., additional, and Langergraber, G., additional

Published
2024
Full Text
View/download PDF

19. Precise measurement of $R_{\text{uds}}$ and $R$ between 1.84 and 3.72 GeV at the KEDR detector

Author

Anashin, V. V., Anchugov, O. V., Aulchenko, V. M., Baldin, E. M., Baranov, G. N., Barladyan, A. K., Barnyakov, A. Yu., Barnyakov, M. Yu., Baru, S. E., Basok, I. Yu., Batrakov, A. M., Bekhtenev, E. A., Blinov, A. E., Blinov, V. E., Bobrov, A. V., Bobrovnikov, V. S., Bogomyagkov, A. V., Bondar, A. E., Buzykaev, A. R., Cheblakov, P. B., Dorohov, V. L., Eidelman, S. I., Grigoriev, D. N., Glukhov, S. A., Kaminskiy, V. V., Karnaev, S. E., Karpov, G. V., Karpov, S. V., Karukina, K. Yu., Kashtankin, D. P., Kasyanenko, P. V., Kharlamova, T. A., Kiselev, V. A., Kolmogorov, V. V., Kononov, S. A., Kotov, K. Yu., Krasnov, A. A., Kravchenko, E. A., Kudryavtsev, V. N., Kulikov, V. F., Kurkin, G. Ya., Kuyanov, I. A., Levichev, E. B., Maksimov, D. A., Malyshev, V. M., Maslennikov, A. L., Meshkov, O. I., Mishnev, S. I., Morozov, I. A., Morozov, I. I., Nikitin, S. A., Nikolaev, I. B., Okunev, I. N., Onuchin, A. P., Oreshkin, S. B., Osipov, A. A., Ovtin, I. V., Peleganchuk, S. V., Pivovarov, S. G., Piminov, P. A., Petrov, V. V., Prisekin, V. G., Rezanova, O. L., Ruban, A. A., Savinov, G. A., Shamov, A. G., Shatilov, D. N., Shvedov, D. A., Shwartz, B. A., Simonov, E. A., Sinyatkin, S. V., Skrinsky, A. N., Sokolov, A. V., Sukhanov, D. P., Sukharev, A. M., Starostina, E. V., Talyshev, A. A., Tayursky, V. A., Telnov, V. I., Tikhonov, Yu. A., Todyshev, K. Yu., Tribendis, A. G., Tumaikin, G. M., Usov, Yu. V., Vorobiov, A. I., Zhilich, V. N., Zhukov, A. A., Zhulanov, V. V., and Zhuravlev, A. N.

Subjects
High Energy Physics - Experiment
Abstract

The present work continues a series of the KEDR measurements of the $R$ value that started in 2010 at the VEPP-4M $e^+e^-$ collider. By combining new data with our previous results in this energy range we measured the values of $R_{\text{uds}}$ and $R$ at nine center-of-mass energies between 3.08 and 3.72 GeV. The total accuracy is about or better than $2.6\%$ at most of energy points with a systematic uncertainty of about $1.9\%$. Together with the previous precise $R$ measurement at KEDR in the energy range 1.84-3.05 GeV, it constitutes the most detailed high-precision $R$ measurement near the charmonium production threshold., Comment: arXiv admin note: text overlap with arXiv:1610.02827 and substantial text overlap with arXiv:1510.02667

Published
2018
Full Text
View/download PDF

20. Measurement of $\Gamma_{ee}\times\mathcal{B}_{\mu\mu}$ for $\psi(2S)$ meson

Author

Anashin, V. V., Anchugov, O. V., Aulchenko, V. M., Baldin, E. M., Baranov, G. N., Barladyan, A. K., Barnyakov, A. Yu., Barnyakov, M. Yu., Baru, S. E., Basok, I. Yu., Batrakov, A. M., Bekhtenev, E. A., Blinov, A. E., Blinov, V. E., Bobrov, A. V., Bobrovnikov, V. S., Bogomyagkov, A. V., Bondar, A. E., Buzykaev, A. R., Cheblakov, P. B., Dorohov, V. L., Eidelman, S. I., Grigoriev, D. N., Glukhov, S. A., Karnaev, S. E., Karpov, G. V., Karpov, S. V., Karukina, K. Yu., Kashtankin, D. P., Kharlamova, T. A., Kiselev, V. A., Kolmogorov, V. V., Kononov, S. A., Kotov, K. Yu., Krasnov, A. A., Kravchenko, E. A., Kudryavtsev, V. N., Kulikov, V. F., Kurkin, G. Ya., Kuyanov, I. A., Kuper, E. A., Levichev, E. B., Maksimov, D. A., Malyshev, V. M., Maslennikov, A. L., Meshkov, O. I., Mishnev, S. I., Morozov, I. A., Morozov, I. I., Muchnoi, N. Yu., Nikitin, S. A., Nikolaev, I. B., Okunev, I. N., Onuchin, A. P., Oreshkin, S. B., Osipov, A. A., Ovtin, I. V., Peleganchuk, S. V., Pivovarov, S. G., Piminov, P. A., Petrov, V. V., Prisekin, V. G., Rezanova, O. L., Ruban, A. A., Savinov, G. A., Shamov, A. G., Shatilov, D. N., Shvedov, D. A., Shwartz, B. A., Simonov, E. A., Sinyatkin, S. V., Skrinsky, A. N., Sokolov, A. V., Sukhanov, D. P., Sukharev, A. M., Starostina, E. V., Talyshev, A. A., Tayursky, V. A., Telnov, V. I., Tikhonov, Yu. A., Todyshev, K. Yu., Tribendis, A. G., Tumaikin, G. M., Usov, Yu. V., Vorobiov, A. I., Zhilich, V. N., Zhukov, A. A., Zhulanov, V. V., and Zhuravlev, A. N.

Subjects
High Energy Physics - Experiment
Abstract

The product of the electronic width of the $\psi(2S)$ meson and the branching fraction of its decay to the muon pair was measured in the $e^{+}e^{-} \to \psi(2S) \to \mu^{+}\mu^{-}$ process using nine data sets corresponding to an integrated luminosity of about 6.5 pb$^{-1}$ collected with the KEDR detector at the VEPP-4M electron-positron collider: \[ \Gamma_{ee}\times\mathcal{B}_{\mu\mu} = 19.3 \pm 0.3 \pm 0.5 ~\text{eV}. \] Adding the previous KEDR results on hadronic and leptonic channels, the values of the $\psi(2S)$ electronic width were obtained under two assumptions: either with the assumption of lepton universality \[ \Gamma_{ee} = 2.279 \pm 0.015 \pm 0.042 ~\text{keV} \] or without it, summing up hadronic and three independent leptonic channels: \[ \Gamma_{ee} = 2.282 \pm 0.015 \pm 0.042 ~\text{keV}. \]

Published
2018
Full Text
View/download PDF

21. Measurement of $\Gamma_{ee}(J/\psi)$ with KEDR detector

Author

Anashin, V. V., Aulchenko, V. M., Baldin, E. M., Barladyan, A. K., Barnyakov, A. Yu., Barnyakov, M. Yu., Baru, S. E., Bedny, I. V., Blinov, A. E., Blinov, V. E., Bobrov, A. V., Bobrovnikov, V. S., Bogomyagkov, A. V., Bondar, A. E., Bondarev, D. V., Buzykaev, A. R., Eidelman, S. I., Glukhovchenko, Yu. M., Gulevich, V. V., Gusev, D. V., Karnaev, S. E., Karpov, G. V., Karpov, S. V., Kharlamova, T. A., Kiselev, V. A., Kononov, S. A., Kotov, K. Yu., Kravchenko, E. A., Kulikov, V. F., Kurkin, G. Ya., Kuper, E. A., Levichev, E. B., Maksimov, D. A., Malyshev, V. M., Maslennikov, A. L., Medvedko, A. S., Meshkov, O. I., Mishnev, S. I., Morozov, I. I., Muchnoi, N. Yu., Neufeld, V. V., Nikitin, S. A., Nikolaev, I. B., Okunev, I. N., Onuchin, A. P., Oreshkin, S. B., Orlov, I. O., Osipov, A. A., Peleganchuk, S. V., Pivovarov, S. G., Piminov, P. A., Petrov, V. V., Poluektov, A. O., Popkov, I. N., Prisekin, V. G., Rezanova, O. L., Ruban, A. A., Sandyrev, V. K., Savinov, G. A., Shamov, A. G., Shatilov, D. N., Shwartz, B. A., Simonov, E. A., Sinyatkin, S. V., Skovpen, Yu. I., Skrinsky, A. N., Smaluk, V. V., Sokolov, A. V., Sukharev, A. M., Starostina, E. V., Talyshev, A. A., Tayursky, V. A., Telnov, V. I., Tikhonov, Yu. A., Todyshev, K. Yu., Tumaikin, G. M., Usov, Yu. V., Vorobiov, A. I., Yushkov, A. N., Zhilich, V. N., Zhulanov, V. V., and Zhuravlev, A. N.

Subjects
High Energy Physics - Experiment
Abstract

The product of the electronic width of the $J/\psi$ meson and the branching fractions of its decay to hadrons and electrons has been measured using the KEDR detector at the VEPP-4M $e^+e^-$ collider. The obtained values are: $\Gamma_{ee}(J/\psi) = 5.550 \pm 0.056 \pm 0.089 \, \text{keV}, $ $\Gamma_{ee}(J/\psi) \cdot \mathcal{B}_\text{hadrons}(J/\psi) = 4.884 \pm 0.048 \pm 0.078 \, \text{keV}, $ $\Gamma_{ee}(J/\psi) \cdot \mathcal{B}_{ee}(J/\psi) = 0.3331 \pm 0.0066 \pm 0.0040 \, \text{keV}.$ The uncertainties shown are statistical and systematic, respectively. Using the result presented and the world-average value of the electronic branching fraction, one obtains the total width of the $J/\psi$ meson: $\Gamma = 92.94 \pm 1.83 \, \text{keV}.$ These results are consistent with the previous experiments., Comment: 19 pages, 13 figures

Published
2018
Full Text
View/download PDF

22. 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
Full Text
View/download PDF

23. Measurement of J/ψ2(π+π-)π0,K+K-π+π-π0,2(π+π-)K+K-π+π- decays into final states J/ψ2(π+π-)π0,K+K-π+π-π0,2(π+π-)K+K-π+π- and J/ψ2(π+π-)π0,K+K-π+π-π0,2(π+π-)K+K-π+π-

Author

Anashin, V. V., Anchugov, O. V., Aulchenko, V. M., Baldin, E. M., Baranov, G. N., Barladyan, A. K., Barnyakov, A. Yu., Barnyakov, M. Yu., Baru, S. E., Basok, I. Yu., Batrakov, A. M., Bekhtenev, E. A., Blinov, A. E., Blinov, V. E., Bobrov, A. V., Bobrovnikov, V. S., Bogomyagkov, A. V., Bondar, A. E., Buzykaev, A. R., Cheblakov, P. B., Dorohov, V. L., Eidelman, S. I., Glukhov, S. A., Grigoriev, D. N., Kaminskiy, V. V., Karnaev, S. E., Karpov, G. V., Karpov, S. V., Karukina, K. Yu., Kashtankin, D. P., Katsin, A. A., Kharlamova, T. A., Kiselev, V. A., Kolmogorov, V. V., Kononov, S. A., Kotov, K. Yu., Krasnov, A. A., Kravchenko, E. A., Kudryavtsev, V. N., Kulikov, V. F., Kuper, E. A., Kurkin, G. Ya., Kuyanov, I. A., Levichev, E. B., Maksimov, D. A., Malyshev, V. M., Maslennikov, A. L., Meshkov, O. I., Mishnev, S. I., Morozov, I. A., Morozov, I. I., Muchnoi, N. Yu., Neufeld, V. V., Nikitin, S. A., Nikolaev, I. B., Okunev, I. N., Onuchin, A. P., Oreshkin, S. B., Osipov, A. A., Ovtin, I. V., Peleganchuk, S. V., Petrov, V. V., Piminov, P. A., Pivovarov, S. G., Prisekin, V. G., Rezanova, O. L., Ruban, A. A., Sandyrev, V. K., Savinov, G. A., Shamov, A. G., Shatilov, D. N., Shekhtman, L. I., Shvedov, D. A., Shwartz, B. A., Simonov, E. A., Sinyatkin, S. V., Skrinsky, A. N., Sokolov, A. V., Starostina, E. V., Sukhanov, D. P., Sukharev, A. M., Talyshev, A. A., Tayursky, V. A., Telnov, V. I., Tikhonov, Yu. A., Todyshev, K. Yu., Tribendis, A. G., Tumaikin, G. M., Usov, Yu. V., Vorobiov, A. I., Zhilich, V. N., Zhukov, A. A., Zhulanov, V. V., and Zhuravlev, A. N.

Published
2022
Full Text
View/download PDF

24. 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
Full Text
View/download PDF

25. Measurement of $R$ between 1.84 and 3.05 GeV at the KEDR detector

Author

Anashin, V. V., Aulchenko, V. M., Baldin, E. M., Barladyan, A. K., Barnyakov, A. Yu., Barnyakov, M. Yu., Baru, S. E., Basok, I. Yu., Batrakov, A. M., Blinov, A. E., Blinov, V. E., Bobrov, A. V., Bobrovnikov, V. S., Bogomyagkov, A. V., Bondar, A. E., Buzykaev, A. R., Eidelman, S. I., Grigoriev, D. N., Glukhovchenko, Yu. M., Karnaev, S. E., Karpov, G. V., Karpov, S. V., Kasyanenko, P. V., Kharlamova, T. A., Kiselev, V. A., Kolmogorov, V. V., Kononov, S. A., Kotov, K. Yu., Kravchenko, E. A., Kudryavtsev, V. N., Kulikov, V. F., Kurkin, G. Ya., Kuyanov, I. A., Levichev, E. B., Maksimov, D. A., Malyshev, V. M., Maslennikov, A. L., Meshkov, O. I., Mishnev, S. I., Morozov, I. I., Muchnoi, N. Yu., Neufeld, V. V., Nikitin, S. A., Nikolaev, I. B., Okunev, I. N., Onuchin, A. P., Oreshkin, S. B., Osipov, A. A., Ovtin, I. V., Peleganchuk, S. V., Pivovarov, S. G., Piminov, P. A., Petrov, V. V., Prisekin, V. G., Rezanova, O. L., Ruban, A. A., Sandyrev, V. K., Savinov, G. A., Shamov, A. G., Shatilov, D. N., Shwartz, B. A., Simonov, E. A., Sinyatkin, S. V., Skrinsky, A. N., Sokolov, A. V., Sukharev, A. M., Starostina, E. V., Talyshev, A. A., Tayursky, V. A., Telnov, V. I., Tikhonov, Yu. A., Todyshev, K. Yu., Tumaikin, G. M., Usov, Yu. V., Vorobiov, A. I., Zhilich, V. N., Zhulanov, V. V., and Zhuravlev, A. N.

Subjects
High Energy Physics - Experiment
Abstract

Using the KEDR detector at the VEPP-4M $e^+e^-$ collider, we have determined the values of $R$ at thirteen points of the center-of-mass energy between 1.84 and 3.05 GeV. The achieved accuracy is about or better than $3.9\%$ at most of the energy points with a systematic uncertainty less than $2.4\%$.

Published
2016
Full Text
View/download PDF

26. Bottomonium-like states: physics case for energy scan above the $B\bar{B}$ threshold at Belle-II

Author

Bondar, A. E., Mizuk, R. V., and Voloshin, M. B.

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Experiment
Abstract

The Belle-II experiment is expected to collect large data samples at the $\Upsilon(4S)$ and $\Upsilon(5S)$ resonances to study primarily $B$ and $B_s$ mesons. We discuss what other data above the $B\bar{B}$ threshold are of interest. We propose to perform a high-statistics energy scan from the $B\bar{B}$ threshold up to the highest possible energy, and to collect data at the $\Upsilon(6S)$ and at higher mass states if they are found in the scan. We emphasize the interest in increasing the maximal energy from 11.24\,GeV to 11.5 - 12\,GeV in the future. These data are needed for investigation of bottomonium and bottomonium-like states., Comment: 11 pages, 2 figures

Published
2016
Full Text
View/download PDF

27. $\Upsilon(6S)$ and triangle singularity in $e^+e^- \to B_1(5721) \bar B \to Z_b(10610) \, \pi$

Author

Bondar, A. E. and Voloshin, M. B.

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Experiment
Abstract

We discuss the possibility that production of final states with bottomonium and light mesons at the peak $\Upsilon(6S)$ in the $e^+e^-$ annihilation at approximately 11.00 GeV is in fact due to a triangular singularity at the threshold of the heavy meson pair production $B_1(5721) \bar B + c.c.$ through the process $e^+e^- \to B_1(5721) \bar B \to Z_b(10610) \, \pi$. The presence of the hidden-bottom resonance $Z_b(10610)$ then explains the observed enhanced production of the final channels with both ortho- and para- bottomonium states, $\Upsilon(nS) \pi \pi$ and $h_b(kP) \pi \pi$. The discussed mechanism also predicts a distinct pattern for production of hidden-bottom states at the $\Upsilon(6S)$ energy that can be tested by experiment., Comment: 11 pages, 3 figures

Published
2016
Full Text
View/download PDF

28. Measurement of $R_{\text{uds}}$ and $R$ between 3.12 and 3.72 GeV at the KEDR detector

Author

Anashin, V. V., Aulchenko, V. M., Baldin, E. M., Barladyan, A. K., Barnyakov, A. Yu., Barnyakov, M. Yu., Baru, S. E., Basok, I. Yu., Batrakov, A. M., Blinov, A. E., Blinov, V. E., Bobrov, A. V., Bobrovnikov, V. S., Bogomyagkov, A. V., Bondar, A. E., Buzykaev, A. R., Eidelman, S. I., Grigoriev, D. N., Glukhovchenko, Yu. M., Karnaev, S. E., Karpov, G. V., Karpov, S. V., Kasyanenko, P. V., Kharlamova, T. A., Kiselev, V. A., Kolmogorov, V. V., Kononov, S. A., Kotov, K. Yu., Kravchenko, E. A., Kudryavtsev, V. N., Kulikov, V. F., Kurkin, G. Ya., Kuyanov, I. A., Levichev, E. B., Maksimov, D. A., Malyshev, V. M., Maslennikov, A. L., Meshkov, O. I., Mishnev, S. I., Morozov, I. I., Muchnoi, N. Yu., Neufeld, V. V., Nikitin, S. A., Nikolaev, I. B., Okunev, I. N., Onuchin, A. P., Oreshkin, S. B., Osipov, A. A., Ovtin, I. V., Peleganchuk, S. V., Pivovarov, S. G., Piminov, P. A., Petrov, V. V., Prisekin, V. G., Rezanova, O. L., Ruban, A. A., Sandyrev, V. K., Savinov, G. A., Shamov, A. G., Shatilov, D. N., Shwartz, B. A., Simonov, E. A., Sinyatkin, S. V., Skrinsky, A. N., Sokolov, A. V., Sukharev, A. M., Starostina, E. V., Talyshev, A. A., Tayursky, V. A., Telnov, V. I., Tikhonov, Yu. A., Todyshev, K. Yu., Tumaikin, G. M., Usov, Yu. V., Vorobiov, A. I., Zhilich, V. N., Zhulanov, V. V., and Zhuravlev, A. N.

Subjects
High Energy Physics - Experiment
Abstract

Using the KEDR detector at the VEPP-4M $e^+e^-$ collider, we have measured the values of $R_{\text{uds}}$ and $R$ at seven points of the center-of-mass energy between 3.12 and 3.72 GeV. The total achieved accuracy is about or better than $3.3\%$ at most of energy points with a systematic uncertainty of about $2.1\%$. At the moment it is the most accurate measurement of $R(s)$ in this energy range.

Published
2015
Full Text
View/download PDF

29. 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
Full Text
View/download PDF

30. 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
Full Text
View/download PDF

33. 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
Full Text
View/download PDF

34. Experiments at the Super charm-tau factory

Author

Achasov, Mikhail N., primary, Blinov, Vladimir E., additional, Bobrov, Alexander V., additional, Bodrov, Denis A., additional, Bondar', Aleksandr E., additional, Vorobiev, Vitalii S., additional, Gorbunov, Dmitrii S., additional, Druzhinin, Vladimir P., additional, Epifanov, Denis A., additional, Kuzmin, Alexander S., additional, Logashenko, Ivan B., additional, Matvienko, Dmitry V., additional, Nefediev, Alexey V., additional, Pakhlov, Pavel N., additional, Pakhlova, Galina V., additional, Popov, Vitalii E., additional, and Uglov, Timofei V., additional

Published
2023
Full Text
View/download PDF

35. Measurement of $J/\psi\to\gamma\eta_{\rm c}$ decay rate and $\eta_{\rm c}$ parameters at KEDR

Author

Anashin, V. V., Aulchenko, V. M., Baldin, E. M., Barladyan, A. K., Barnyakov, A. Yu., Barnyakov, M. Yu., Baru, S. E., Basok, I. Yu., Bedny, I. V., Blinov, A. E., Blinov, V. E., Bobrov, A. V., Bobrovnikov, V. S., Bogomyagkov, A. V., Bondar, A. E., Buzykaev, A. R., Eidelman, S. I., Glukhovchenko, Yu. M., Gulevich, V. V., Gusev, D. V., Karnaev, S. E., Karpov, G. V., Karpov, S. V., Kharlamova, T. A., Kiselev, V. A., Kononov, S. A., Kotov, K. Yu., Kravchenko, E. A., Kulikov, V. F., Kurkin, G. Ya., Kuper, E. A., Levichev, E. B., Maksimov, D. A., Malyshev, V. M., Maslennikov, A. L., Medvedko, A. S., Meshkov, O. I., Mishnev, S. I., Morozov, I. I., Muchnoi, N. Yu., Neufeld, V. V., Nikitin, S. A., Nikolaev, I. B., Okunev, I. N., Onuchin, A. P., Oreshkin, S. B., Orlov, I. O., Osipov, A. A., Peleganchuk, S. V., Pivovarov, S. G., Piminov, P. A., Petrov, V. V., Poluektov, A. O., Pospelov, G. E., Prisekin, V. G., Rezanova, O. L., Ruban, A. A., Sandyrev, V. K., Savinov, G. A., Shamov, A. G., Shatilov, D. N., Shwartz, B. A., Simonov, E. A., Sinyatkin, S. V., Skrinsky, A. N., Smaluk, V. V., Sokolov, A. V., Sukharev, A. M., Starostina, E. V., Talyshev, A. A., Tayursky, V. A., Telnov, V. I., Tikhonov, Yu. A., Todyshev, K. Yu., Tumaikin, G. M., Usov, Yu. V., Vorobiov, A. I., Yushkov, A. N., Zhilich, V. N., Zhulanov, V. V., and Zhuravlev, A. N.

Subjects
High Energy Physics - Experiment
Abstract

Using the inclusive photon spectrum based on a data sample collected at the $J/\psi$ peak with the KEDR detector at the VEPP-4M $e^+e^-$ collider, we measured the rate of the radiative decay $J/\psi\to\gamma\eta_{\rm c}$ as well as $\eta_{\rm c}$ mass and width. Taking into account an asymmetric photon lineshape we obtained $\Gamma^0_{\gamma\eta_{\rm c}}=2.98\pm0.18 \phantom{|}^{+0.15}_{-0.33}$ keV, $M_{\eta_{\rm c}} = 2983.5 \pm 1.4 \phantom{|}^{+1.6}_{-3.6}$ MeV/$c^2$, $\Gamma_{\eta_{\rm c}} = 27.2 \pm 3.1 \phantom{|}^{+5.4}_{-2.6}$ MeV., Comment: 6 pages, 3 figures

Published
2014
Full Text
View/download PDF

36. Parameters of charmonium states from KEDR

Author

KEDR Collaboration, Aulchenko, V. M., Baldin, E. M., Barladyan, A. K., Barnyakov, A. Yu., Barnyakov, M. Yu., Baru, S. E., Basok, I. Yu., Batrakov, A. M., Blinov, A. E., Blinov, V. E., Bobrov, A. V., Bobrovnikov, V. S., Bogomyagkov, A. V., Bondar, A. E., Buzykaev, A. R., Eidelman, S. I., Grigoriev, D. N., Groshev, V. R., Glukhovchenko, Yu. M., Gulevich, V. V., Gusev, D. V., Karnaev, S. E., Karpov, G. V., Karpov, S. V., Kharlamova, T. A., Kiselev, V. A., Kolmogorov, V. V., Kononov, S. A., Kotov, K. Yu., Kravchenko, E. A., Kudryavtsev, V. N., Kulikov, V. F., Kurkin, G. Ya., Kuper, E. A., Kuyanov, I. A., Levichev, E. B., Maksimov, D. A., Malyshev, V. M., Maslennikov, A. L., Meshkov, O. I., Mishnev, S. I., Morozov, I. I., Muchnoi, N. Yu., Neufeld, V. V., Nikitin, S. A., Nikolaev, I. B., Okunev, I. N., Onuchin, A. P., Oreshkin, S. B., Orlov, I. O., Osipov, A. A., Ovtin, I. V., Peleganchuk, S. V., Pivovarov, S. G., Piminov, P. A., Petrov, V. V., Poluektov, A. O., Prisekin, V. G., Rezanova, O. L., Ruban, A. A., Sandyrev, V. K., Savinov, G. A., Shamov, A. G., Shatilov, D. N., Shwartz, B. A., Simonov, E. A., Sinyatkin, S. V., Skrinsky, A. N., Sokolov, A. V., Sukharev, A. M., Starostina, E. V., Talyshev, A. A., Tayursky, V. A., Telnov, V. I., Tikhonov, Yu. A., Todyshev, K. Yu., Tumaikin, G. M., Usov, Yu. V., Vorobiov, A. I., Zhilich, V. N., Zhulanov, V. V., and Zhuravlev, A. N.

Subjects
High Energy Physics - Experiment
Abstract

We report results of experiments performed with the KEDR detector at the VEPP-4M $e^+e^-$ collider. They include final results for the mass and other parameters of the $J/\psi$, $\psi(2S)$ and $\psi(3770)$ and $J/\psi\to\gamma\eta_c$ branching fraction determination., Comment: 5 pages, 6 figures, PhiPsi 2013, International Workshop on e+e- collisions from Phi to Psi. September 9-12, 2013, Rome, Italy

Published
2013

37. Measurement of the ratio of the leptonic widths $\Gamma_{ee}/\Gamma_{\mu\mu}$ for the $J/\psi$ meson

Author

KEDR Collaboration, Aulchenko, V. M., Baldin, E. M., Barladyan, A. K., Barnyakov, A. Yu., Barnyakov, M. Yu., Baru, S. E., Basok, I. Yu., Batrakov, A. M., Blinov, A. E., Blinov, V. E., Bobrov, A. V., Bobrovnikov, V. S., Bogomyagkov, A. V., Bondar, A. E., Buzykaev, A. R., Eidelman, S. I., Grigoriev, D. N., Groshev, V. R., Glukhovchenko, Yu. M., Gulevich, V. V., Gusev, D. V., Karnaev, S. E., Karpov, G. V., Karpov, S. V., Kharlamova, T. A., Kiselev, V. A., Kolmogorov, V. V., Kononov, S. A., Kotov, K. Yu., Kravchenko, E. A., Kudryavtsev, V. N., Kulikov, V. F., Kurkin, G. Ya., Kuper, E. A., Levichev, E. B., Maksimov, D. A., Malyshev, V. M., Maslennikov, A. L., Meshkov, O. I., Mishnev, S. I., Morozov, I. I., Muchnoi, N. Yu., Neufeld, V. V., Nikitin, S. A., Nikolaev, I. B., Okunev, I. N., Onuchin, A. P., Oreshkin, S. B., Orlov, I. O., Osipov, A. A., Peleganchuk, S. V., Pivovarov, S. G., Piminov, P. A., Petrov, V. V., Poluektov, A. O., Prisekin, V. G., Rezanova, O. L., Ruban, A. A., Sandyrev, V. K., Savinov, G. A., Shamov, A. G., Shatilov, D. N., Shwartz, B. A., Simonov, E. A., Sinyatkin, S. V., Skrinsky, A. N., Sokolov, A. V., Sukharev, A. M., Starostina, E. V., Talyshev, A. A., Tayursky, V. A., Telnov, V. I., Tikhonov, Yu. A., Todyshev, K. Yu., Tumaikin, G. M., Usov, Yu. V., Vorobiov, A. I., Yushkov, A. N., Zhilich, V. N., Zhulanov, V. V., and Zhuravlev, A. N.

Subjects
High Energy Physics - Experiment
Abstract

The ratio of the electron and muon widths of the $J/\psi$ meson has been measured using direct $J/\psi$ decays in the KEDR experiment at the VEPP-4M electron-positron collider. The result $\Gamma_{ee}(J/\psi)/\Gamma_{\mu\mu}(J/\psi)=1.0022\pm0.0044\pm0.0048\ (0.65\%)$ is in good agreement with the lepton universality. The experience collected during this analysis will be used for a $J/\psi$ lepton width determination with up to 1% accuracy., Comment: 5 pages, 6 figures, 2 tables

Published
2013
Full Text
View/download PDF

40. 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

41. Search for $\tau\to\mu+\gamma$ decay at Super $c -\tau$ factory

Author

Bobrov, A. V. and Bondar, A. E.

Subjects
High Energy Physics - Experiment
Abstract

A Monte Carlo study of possible background processes in a search for $\tau \to \mu \gamma$ decay has been performed for conditions of the Super $c-\tau$ factory (CTF) (at a center-of-mass energy 3.686 GeV, 3.77 GeV and 4.17 GeV). The background from $\tau^{+}\tau^{-}$ events has been analysed. Selection criteria for background suppression are suggested and necessary requirements on the detector characteristics have been found. The CTF can successfully compete with the Super B-factory in a search for $\tau \to \mu \gamma$ decay., Comment: 3 pages, 1 figures; contribution to the Proceedings of the PHIPSI11 Workshop (Novosibirsk, Russia, 19-22 September 2011)

Published
2012
Full Text
View/download PDF

42. Measurement of J/psi leptonic width with the KEDR detector

Author

Anashin, V. V., Aulchenko, V. M., Baldin, E. M., Barladyan, A. K., Barnyakov, A. Yu., Barnyakov, M. Yu., Baru, S. E., Basok, I. Yu., Beloborodova, O. L., Blinov, A. E., Blinov, V. E., Bobrov, A. V., Bobrovnikov, V. S., Bogomyagkov, A. V., Bondar, A. E., Buzykaev, A. R., Eidelman, S. I., Grigoriev, D. N., Glukhovchenko, Yu. M., Gulevich, V. V., Gusev, D. V., Karnaev, S. E., Karpov, G. V., Karpov, S. V., Kharlamova, T. A., Kiselev, V. A., Kolmogorov, V. V., Kononov, S. A., Kotov, K. Yu., Kravchenko, E. A., Kudryavtsev, V. N., Kulikov, V. F., Kurkin, G. Ya., Kuper, E. A., Levichev, E. B., Maksimov, D. A., Malyshev, V. M., Maslennikov, A. L., Medvedko, A. S., Meshkov, O. I., Mishnev, S. I., Morozov, I. I., Muchnoi, N. Yu., Neufeld, V. V., Nikitin, S. A., Nikolaev, I. B., Okunev, I. N., Onuchin, A. P., Oreshkin, S. B., Orlov, I. O., Osipov, A. A., Peleganchuk, S. V., Pivovarov, S. G., Piminov, P. A., Petrov, V. V., Poluektov, A. O., Prisekin, V. G., Ruban, A. A., Sandyrev, V. K., Savinov, G. A., Shamov, A. G., Shatilov, D. N., Shwartz, B. A., Simonov, E. A., Sinyatkin, S. V., Skrinsky, A. N., Smaluk, V. V., Sokolov, A. V., Sukharev, A. M., Starostina, E. V., Talyshev, A. A., Tayursky, V. A., Telnov, V. I., Tikhonov, Yu. A., Todyshev, K. Yu., Tumaikin, G. M., Usov, Yu. V., Vorobiov, A. I., Yushkov, A. N., Zhilich, V. N., Zhulanov, V. V., and Zhuravlev, A. N.

Subjects
High Energy Physics - Experiment
Abstract

We report a new precise determination of the leptonic widths of the J/psi meson performed with the KEDR detector at the VEPP-4M $e^{+}e^{-}$ collider. The measured values of the J/psi parameters are: \Gamma_{ee}\times\Gamma_{ee}/\Gamma = 0.3323 \pm 0.0064 (stat.) \pm 0.0048 (syst.) keV \Gamma_{ee}\times\Gamma_{\mu\mu}/\Gamma=0.3318 \pm 0.0052 (stat.) \pm 0.0063 (syst.) keV. Assuming $e\mu$ universality and using the table value of the branching ratios the leptonic \Gamma_{ll}= 5.59 \pm 0.12 keV width and the total \Gamma=94.1 \pm 2.7 keV widths were obtained. We also discuss in detail a method to calculate radiative corrections at a narrow resonance., Comment: Published in proceedings of the PhiPsi 2009 conference

Published
2011

43. Observation of the h_b states and Beyond

Author

Bondar, A. E.

Subjects
High Energy Physics - Experiment
Abstract

Originally designed for CP violation studies in the B meson system, the B-Factories recently showed an exciting capability for improving our experimental knowledge in the field of hadron spectroscopy. We review results on bottomonium spectroscopy from the Belle experiment at the KEK-B e+e- collider and present exciting new results from the unique large data set taken at the Upsilon(5S) resonance., Comment: Presented at the Ninth International Conference on Flavor Physics and CP Violation(FPCP 2011) Maale Hachamisha, Israel, May 23--27, 2011

Published
2011

44. Measurement of \psi(3770) parameters

Author

Anashin, V. V., Aulchenko, V. M., Baldin, E. M., Barladyan, A. K., Barnyakov, A. Yu., Barnyakov, M. Yu., Baru, S. E., Basok, I. Yu., Beloborodova, O. L., Blinov, A. E., Blinov, V. E., Bobrov, A. V., Bobrovnikov, V. S., Bogomyagkov, A. V., Bondar, A. E., Buzykaev, A. R., Eidelman, S. I., Grigoriev, D. N., Glukhovchenko, Yu. M., Gulevich, V. V., Gusev, D. V., Karnaev, S. E., Karpov, G. V., Karpov, S. V., Kharlamova, T. A., Kiselev, V. A., Kolmogorov, V. V., Kononov, S. A., Kotov, K. Yu., Kravchenko, E. A., Kudryavtsev, V. N., Kulikov, V. F., Kurkin, G. Ya., Kuper, E. A., Levichev, E. B., Maksimov, D. A., Malyshev, V. M., Maslennikov, A. L., Medvedko, A. S., Meshkov, O. I., Mishnev, S. I., Morozov, I. I., Muchnoi, N. Yu., Neufeld, V. V., Nikitin, S. A., Nikolaev, I. B., Okunev, I. N., Onuchin, A. P., Oreshkin, S. B., Orlov, I. O., Osipov, A. A., Peleganchuk, S. V., Pivovarov, S. G., Piminov, P. A., Petrov, V. V., Poluektov, A. O., Prisekin, V. G., Ruban, A. A., Sandyrev, V. K., Savinov, G. A., Shamov, A. G., Shatilov, D. N., Shwartz, B. A., Simonov, E. A., Sinyatkin, S. V., Skrinsky, A. N., Smaluk, V. V., Sokolov, A. V., Sukharev, A. M., Starostina, E. V., Talyshev, A. A., Tayursky, V. A., Telnov, V. I., Tikhonov, Yu. A., Todyshev, K. Yu., Tumaikin, G. M., Usov, Yu. V., Vorobiov, A. I., Yushkov, A. N., Zhilich, V. N., Zhulanov, V. V., and Zhuravlev, A. N.

Subjects
High Energy Physics - Experiment
Abstract

We report the final results of a study of the \psi(3770) meson using a data sample collected with the KEDR detector at the VEPP-4M electron-positron collider. The data analysis takes into account the interference between the resonant and nonresonant $D\bar{D}$ production, where the latter is related to the nonresonant part of the energy-dependent form factor $F_D$. The vector dominance approach and several empirical parameterizations have been tried for the nonresonant $F_D^{\NR}(s)$. Our results for the mass and total width of \psi(3770) are M = 3779.2 ^{+1.8}_{-1.7} ^{+0.5}_{-0.7} ^{+0.3}_{-0.3} MeV, \Gamma =24.9 ^{+4.6}_{-4.0} ^{+0.5}_{-0.6} ^{+0.2}_{-0.9} MeV, where the first, second and third uncertainties are statistical, systematic and model, respectively. For the electron partial width two possible solutions have been found: (1) \Gamma_{ee} = 154 ^{+79}_{-58} ^{+17}_{-9} ^{+13}_{-25} eV, (2) \Gamma_{ee} = 414 ^{+72}_{-80} ^{+24}_{-26} ^{+90}_{-10} eV. Our statistics are insufficient to prefer one solution to another. The solution (2) mitigates the problem of non-$D\bar{D}$ decays but is disfavored by potential models. It is shown that taking into account the resonance--continuum interference in the near-threshold region affects resonance parameters, thus the results presented can not be directly compared with the corresponding PDG values obtained ignoring this effect.

Published
2011
Full Text
View/download PDF

45. Measurement of main parameters of the \psi(2S) resonance

Author

Anashin, V. V., Aulchenko, V. M., Baldin, E. M., Barladyan, A. K., Barnyakov, A. Yu., Barnyakov, M. Yu., Baru, S. E., Basok, I. Yu., Beloborodova, O. L., Blinov, A. E., Blinov, V. E., Bobrov, A. V., Bobrovnikov, V. S., Bogomyagkov, A. V., Bondar, A. E., Buzykaev, A. R., Eidelman, S. I., Grigoriev, D. N., Glukhovchenko, Yu. M., Gulevich, V. V., Gusev, D. V., Karnaev, S. E., Karpov, G. V., Karpov, S. V., Kharlamova, T. A., Kiselev, V. A., Kolmogorov, V. V., Kononov, S. A., Kotov, K. Yu., Kravchenko, E. A., Kudryavtsev, V. N., Kulikov, V. F., Kurkin, G. Ya., Kuper, E. A., Levichev, E. B., Maksimov, D. A., Malyshev, V. M., Maslennikov, A. L., Medvedko, A. S., Meshkov, O. I., Mishnev, S. I., Morozov, I. I., Muchnoi, N. Yu., Neufeld, V. V., Nikitin, S. A., Nikolaev, I. B., Okunev, I. N., Onuchin, A. P., Oreshkin, S. B., Orlov, I. O., Osipov, A. A., Peleganchuk, S. V., Pivovarov, S. G., Piminov, P. A., Petrov, V. V., Poluektov, A. O., Prisekin, V. G., Ruban, A. A., Sandyrev, V. K., Savinov, G. A., Shamov, A. G., Shatilov, D. N., Shwartz, B. A., Simonov, E. A., Sinyatkin, S. V., Skrinsky, A. N., Smaluk, V. V., Sokolov, A. V., Sukharev, A. M., Starostina, E. V., Talyshev, A. A., Tayursky, V. A., Telnov, V. I., Tikhonov, Yu. A., Todyshev, K. Yu., Tumaikin, G. M., Usov, Yu. V., Vorobiov, A. I., Yushkov, A. N., Zhilich, V. N., Zhulanov, V. V., and Zhuravlev, A. N.

Subjects
High Energy Physics - Experiment
Abstract

A high-precision determination of the main parameters of the \psi(2S) resonance has been performed with the KEDR detector at the VEPP-4M e^{+}e^{-} collider in three scans of the \psi(2S) -- \psi(3770) energy range. Fitting the energy dependence of the multihadron cross section in the vicinity of the \psi(2S) we obtained the mass value M = 3686.114 +- 0.007 +- 0.011 ^{+0.002}_{-0.012} MeV and the product of the electron partial width by the branching fraction into hadrons \Gamma_{ee}*B_{h} = 2.233 +- 0.015 +- 0.037 +- 0.020 keV. The third error quoted is an estimate of the model dependence of the result due to assumptions on the interference effects in the cross section of the single-photon e^{+}e^{-} annihilation to hadrons explicitly considered in this work. Implicitly, the same assumptions were employed to obtain the charmonium leptonic width and the absolute branching fractions in many experiments. Using the result presented and the world average values of the electron and hadron branching fractions, one obtains the electron partial width and the total width of the \psi(2S): \Gamma_{ee} =2.282 +- 0.015 +- 0.038 +- 0.021 keV, \Gamma = 296 +- 2 +- 8 +- 3 keV. These results are consistent with and more than two times more precise than any of the previous experiments.

Published
2011
Full Text
View/download PDF

46. Search for narrow resonances in e+ e- annihilation between 1.85 and 3.1 GeV with the KEDR Detector

Author

KEDR Collaboration, Anashin, V. V., Aulchenko, V. M., Baldin, E. M., Barladyan, A. K., Barnyakov, A. Yu., Barnyakov, M. Yu., Baru, S. E., Basok, I. Yu., Beloborodova, O. L., Blinov, A. E., Blinov, V. E., Bobrov, A. V., Bobrovnikov, V. S., Bogomyagkov, A. V., Bondar, A. E., Buzykaev, A. R., Eidelman, S. I., Grigoriev, D. N., Glukhovchenko, Yu. M., Gulevich, V. V., Gusev, D. V., Karnaev, S. E., Karpov, G. V., Karpov, S. V., Kharlamova, T. A., Kiselev, V. A., Kolmogorov, V. V., Kononov, S. A., Kotov, K. Yu., Kravchenko, E. A., Kudryavtsev, V. N., Kulikov, V. F., Kurkin, G. Ya., Kuper, E. A., Levichev, E. B., Maksimov, D. A., Malyshev, V. M., Maslennikov, A. L., Medvedko, A. S., Meshkov, O. I., Mishnev, S. I., Morozov, I. I., Muchnoi, N. Yu., Neufeld, V. V., Nikitin, S. A., Nikolaev, I. B., Okunev, I. N., Onuchin, A. P., Oreshkin, S. B., Orlov, I. O., Osipov, A. A., Peleganchuk, S. V., Pivovarov, S. G., Piminov, P. A., Petrov, V. V., Poluektov, A. O., Prisekin, V. G., Ruban, A. A., Sandyrev, V. K., Savinov, G. A., Shamov, A. G., Shatilov, D. N., Shwartz, B. A., Simonov, E. A., Sinyatkin, S. V., Skrinsky, A. N., Smaluk, V. V., Sokolov, A. V., Sukharev, A. M., Starostina, E. V., Talyshev, A. A., Tayursky, V. A., Telnov, V. I., Tikhonov, Yu. A., Todyshev, K. Yu., Tumaikin, G. M., Usov, Yu. V., Vorobiov, A. I., Yushkov, A. N., Zhilich, V. N., Zhulanov, V. V., and Zhuravlev, A. N.

Subjects
High Energy Physics - Experiment
Abstract

We report results of a search for narrow resonances in e+ e- annihilation at center-of-mass energies between 1.85 and 3.1 GeV performed with the KEDR detector at the VEPP-4M e+ e- collider. The upper limit on the leptonic width of a narrow resonance Gamma(R -> ee) Br(R -> hadr) < 120 eV has been obtained (at 90 % C.L.).

Published
2011
Full Text
View/download PDF

47. Heavy quark spin structure in Z_b resonances

Author

Bondar, A. E., Garmash, A., Milstein, A. I., Mizuk, R., and Voloshin, M. B.

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Experiment
Abstract

We discuss the heavy quark spin structure of the recently observed `twin' resonances $Z_b(10610)$ and $Z_b(10650)$ assuming that these are mostly of a `molecular' type, i.e. that their internal dynamics is dominated by the coupling to meson pairs $B^* \bar B - B {\bar B}^*$ and $B^* {\bar B}^*$. We find that the state of the $b \bar b$ pair within the $Z_b(10610)$ and $Z_b(10650)$ resonances is a mixture of a spin-triplet and a spin-singlet of equal amplitude and with the phase orthogonal between the two resonances. Such a structure gives rise to specific relations between observable amplitudes that are in agreement with the data obtained recently by Belle. We also briefly discuss possible properties of the isotopically singlet counterparts of the newly found resonances, and also of their $C$ ($G$) parity opposites that likely exist in the same mass range near the open $B$ flavor threshold., Comment: 4 pages

Published
2011
Full Text
View/download PDF

48. Nucleon polarization in the process $e^+e^-\to N\bar{N}$ near threshold

Author

Bondar, A. E., Dmitriev, V. F., Milstein, A. I., and Strakhovenko, V. M.

Subjects
High Energy Physics - Phenomenology
Abstract

The process $e^+e^- \rightarrow N\bar N$ is studied nearby a threshold with account for polarizations of all initial and final particles. The nucleon polarization $\bm \zeta^N$ reveals a strong energy dependence due to that of the nucleon electromagnetic form factors $G_E(Q^2)$ and $G_M(Q^2)$ caused by the final-state interaction of nucleons. It is shown that the modulus of the ratio of these form factors and their relative phase can be determined by measuring $\bm \zeta^N$ along with the differential cross section. The polarization degree is analyzed using Paris $N\bar N$ optical potential for calculation of the form factors. It turns out that $|\bm \zeta^N|$ is high enough in a rather wide energy range above the threshold. Being especially high for longitudinally polarized beams, $|\bm \zeta^N|$ is noticeable even if both $e^+e^-$ beams are unpolarized., Comment: 10 pages,6 figures

Published
2010
Full Text
View/download PDF

49. Measurement of B(J/psi->eta_c gamma) at KEDR

Author

Anashin, V. V., Aulchenko, V. M., Baldin, E. M., Barladyan, A. K., Barnyakov, A. Yu., Barnyakov, M. Yu., Baru, S. E., Basok, I. Yu., Bedny, I. V., Beloborodova, O. L., Blinov, A. E., Blinov, V. E., Bobrov, A. V., Bobrovnikov, V. S., Bogomyagkov, A. V., Bondar, A. E., Buzykaev, A. R., Eidelman, S. I., Glukhovchenko, Yu. M., Gulevich, V. V., Gusev, D. V., Karnaev, S. E., Karpov, G. V., Karpov, S. V., Kharlamova, T. A., Kiselev, V. A., Kononov, S. A., Kotov, K. Yu., Kravchenko, E. A., Kulikov, V. F., Kurkin, G. Ya., Kuper, E. A., Levichev, E. B., Maksimov, D. A., Malyshev, V. M., Maslennikov, A. L., Medvedko, A. S., Meshkov, O. I., Milstein, A. I., Mishnev, S. I., Morozov, I. I., Muchnoi, N. Yu., Neufeld, V. V., Nikitin, S. A., Nikolaev, I. B., Okunev, I. N., Onuchin, A. P., Oreshkin, S. B., Orlov, I. O., Osipov, A. A., Peleganchuk, S. V., Pivovarov, S. G., Piminov, P. A., Petrov, V. V., Poluektov, A. O., Shatilov, D. N., Pospelov, G. E., Prisekin, V. G., Ruban, A. A., Sandyrev, V. K., Savinov, G. A., Shamov, A. G., Shwartz, B. A., Simonov, E. A., Sinyatkin, S. V., Skovpen, Yu. I., Skrinsky, A. N., Smaluk, V. V., Sokolov, A. V., Sukharev, A. M., Starostina, E. V., Talyshev, A. A., Tayursky, V. A., Telnov, V. I., Tikhonov, Yu. A., Todyshev, K. Yu., Tumaikin, G. M., Usov, Yu. V., Vorobiov, A. I., Yushkov, A. N., Zhilich, V. N., Zhulanov, V. V., and Zhuravlev, A. N.

Subjects
High Energy Physics - Experiment
Abstract

We present a study of the inclusive photon spectrum from 6.3 million J/psi decays collected with the KEDR detector at the VEPP-4M e+e- collider. We measure the branching fraction of the radiative decay J/psi -> eta_c gamma, eta_c width and mass. Taking into account an asymmetric photon line shape we obtain: M(eta_c) = (2978.1 +- 1.4 +- 2.0) MeV/c^2, Gamma(eta_c) = (43.5 +- 5.4 +- 15.8) MeV, B(J/psi->eta_c gamma) = (2.59 +- 0.16 +- 0.31)%$., Comment: 6 pages, 1 figure. To be published in the proceedings of the 4th International Workshop on Charm Physics (Charm2010), October 21-24, 2010, IHEP, Beijing

Published
2010
Full Text
View/download PDF

50. Measurement of $\phi$(1020) meson leptonic width with CMD-2 detector at VEPP-2M Collider

Author

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

Subjects
High Energy Physics - Experiment
Abstract

The $\phi$(1020) meson leptonic width has been determined from the combined analysis of 4 major decay modes of the resonance ($\phi\to K^+ K^-,K^0_LK^0_S,\pi^+\pi^-\pi^0,\eta\gamma$) studied with the CMD-2 detector at the VEPP-2M $e^+e^-$ collider. The following value has been obtained: $\Gamma(\phi\to e^+e^-) = 1.235\pm 0.006\pm 0.022$ keV. The $\phi(1020)$ meson parameters in four main decay channels have been also recalculated: $B(\phi\to K^+K^-) = 0.493\pm 0.003\pm 0.007$, $B(\phi\to K_LK_S) = 0.336\pm 0.002\pm 0.006$, $B(\phi\to\pi^+\pi^-\pi^0) = 0.155\pm 0.002\pm 0.005$, $B(\phi\to\eta\gamma) = 0.0138\pm 0.0002\pm 0.0002$., Comment: 14 pages, 3 figures

Published
2010
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results