14 results on '"Botov, A.A."'
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2. Electromagnetic calorimeter time measurement applications in the SND physics analysis.
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Melnikova, N.A., Achasov, M.N., Botov, A.A., Druzhinin, V.P., Kardapoltsev, L.V., Korol, A.A., Kovrizhin, D.P., Serednyakov, S.I., and Surin, I.K.
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CALORIMETERS , *TIME measurements , *COINCIDENCE , *SIGNAL processing , *DIGITAL signal processing , *PHYSICS - Abstract
The SND is a non-magnetic detector at the VEPP-2000 e + e − collider (BINP, Novosibirsk) designed for hadronic cross-section measurements in the center-of-mass energy range up to 2 GeV. The important part of the detector is a segmented electromagnetic calorimeter (EMC) with three layers of NaI(Tl) counters. The EMC signal shaping and digitizing electronics based on FADC allow one to obtain both the signal amplitude and the arrival time. We describe the EMC signal processing and how the EMC measured time is applied in event reconstruction and physics analysis. [ABSTRACT FROM AUTHOR]
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- 2023
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3. Study of the process e+e−→ π+π−π0η at the SND detector.
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Denig, A., Redmer, C.-F., and Botov, A.A.
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COLLIDERS (Nuclear physics) , *NUCLEAR cross sections , *VECTOR mesons , *HADRONS , *ELECTROMAGNETIC coupling - Abstract
The reaction e+e−→ π+ π−π0η has been studied in the experiment with the SND detector at the VEPP-2000 e+e− collider. The reaction proceeds via the four intermediate states: ωη, φη, a0ρ, and structureless π+π−π0η state, which may be, for example, ρ(1450) with ρ(1450) → ρ(770)η. The total e+e−→ π+π−π0η cross section and cross section for the four intermediate states have been measured and fitted in the vector meson dominance model. [ABSTRACT FROM AUTHOR]
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- 2019
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4. Spherical Neutral Detector tracking system for experiments at VEPP-2000 collider
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Aulchenko, V.M., Bogdanchikov, A.G., Botov, A.A., Bukin, A.D., Bukin, D.A., Dimova, T.V., Druzhinin, V.P., Filatov, P.V., Golubev, V.B., Kharlamov, A.G., Korol, A.A., Koshuba, S.V., Obrazovsky, A.E., Pakhtusova, E.V., Serednyakov, S.I., Sirotkin, A.A., Usov, Yu.V., and Vasiljev, A.V.
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ENGINEERING instruments , *PROTOTYPES , *COORDINATES , *SCISSION (Chemistry) - Abstract
Abstract: The new tracking system of the Spherical Neutral Detector for experiments at the VEPP-2000 collider in Novosibirsk is described. The system consists of a 9-layer drift chamber with 24 jet cells and a proportional chamber in a common gas volume. Main system features are its small size and high density of readout channels for gaseous tracking systems at colliding experiments. The drift chamber provides at least four measurements along the track for charged particles within 94% solid angle and nine measurements for particles propagating at large angle relative to the beam axis. coordinates (in a plane perpendicular to the beam axis) are obtained using the ionization drift time measurement. Longitudial coordinates are measured using charge division on anode wires and charge distribution on cathode strips. Design angular resolutions for radial tracks are , , the vertex resolution is . The full-size prototype of the tracking system has been assembled and tested. The wire structure of the prototype represents one quadrant of the chamber. Results of the prototype assembly quality control and tests with radioactive sources and cosmic rays are presented. They are in a good agreement with expected system parameters. [Copyright &y& Elsevier]
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- 2007
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5. Overview of SND hadronic cross section measurements.
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Denig, A., Redmer, C.-F., Dimova, T.V., Achasov, M.N., Aulchenko, V.M., Barnyakov, A.Yu., Beloborodov, K.I., Berdyugin, A.V., Berkaev, D.E., Bogdanchikov, A.G., Botov, A.A., Druzhinin, V.P., Ganeev, E.B., Golubev, V.B., Kardapoltsev, L.V., Kasaev, A.S., Kharlamov, A.G., Kirpotin, A.N., Koop, I.A., and Korneev, L.A.
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NUCLEAR cross sections , *COLLIDERS (Nuclear physics) , *CHERENKOV counters , *MUONS , *STANDARD model (Nuclear physics) - Abstract
At the end of 2016 the SND detector resumed data taking at the upgraded VEPP-2000 e+e− collider. The analysis of data accumulated in 2010-2013 with an integrated lumonosity of 70 pb−1 is continuing. Recent results on measurements of various hadronic cross sections are presented. [ABSTRACT FROM AUTHOR]
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- 2019
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6. SND tracking system—Tests with cosmic muons
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Aulchenko, V.M., Bogdanchikov, A.G., Botov, A.A., Bukin, A.D., Bukin, D.A., Dimova, T.V., Druzhinin, V.P., Filatov, P.V., Golubev, V.B., Kharlamov, A.G., Korol, A.A., Koshuba, S.V., Obrazovsky, A.E., Pakhtusova, E.V., Popov, V.M., Serednyakov, S.I., Sirotkin, A.A., Surin, I.K., Tikhonov, Yu.A., and Tsukanova, E.G.
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NUCLEAR counters , *DRIFT chambers , *COSMIC ray neutrons , *NUCLEAR track detectors - Abstract
Abstract: Tracking system of the SND detector is fully assembled, equipped and tested with cosmic muons in 2007. During these tests operation conditions of the system were checked and optimized and main parameters of the system were measured. Design values of gas gain, detection efficiency and space resolution were achieved. Tracking system is ready for installation into the SND detector and coming data taking at the VEPP-2000 -collider in Novosibirsk. [Copyright &y& Elsevier]
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- 2009
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7. Study of e+e− annihilation to hadrons at the VEPP-2000 collider.
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Wrońska, A., Magiera, A., Przygoda, W., Beloborodov, K.I., Achasov, M.N., Akhmetshin, R.R., Amirkhanov, A.N., Anisenkov, A.V., Aulchenko, V.M., Banzarov, V.Sh., Barnyakov, A.Yu., Bashtovoy, N.S., Berdyugin, A.V., Bogdanchikov, A.G., Bondar, A.E., Botov, A.A., Bragin, A.V., Dimova, T.V., Druzhinin, V.P., and Eidelman, S.I.
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HEAT transfer , *MOMENTUM transfer , *TRANSPORT theory , *REYNOLDS analogy , *MASS transfer - Abstract
We present current status of the SND and CMD-3 experiments at the VEPP-2000 e+e− collider and recent result of data analysis on the processes e + e − → π + π − , n n ¯ , π + π − η , π + π − π 0 η , K S K L π 0 $e^+e^-\rightarrow\pi^+\pi^-,n\overline n,\pi^+\pi^-\eta,\pi^+\pi^-\pi^0\eta,K_SK_L\pi^0$ , etc. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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8. Measurement of the hadronic cross sections with the CMD-3 and SND detectors at the VEPP-2000 collider.
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Aharonov, Y., Bravina, L., Kabana, S., Korol, A.A., Achasov, M.N., Akhmetshin, R.R., Amirkhanov, A.N., Anisenkov, A.V., Aulchenko, V.M., Banzarov, V.S., Barnyakov, A. Yu., Bashtovoy, N.S., Beloborodov, K.I., Berdyugin, A.V., Berkaev, D.E., Bogdanchikov, A.G., Bondar, A.E., Botov, A.A., Bragin, A.V., and Dimova, T.V.
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NUCLEAR cross sections , *ELECTRON-positron interactions , *COLLIDERS (Nuclear physics) , *MUONS , *LUMINOSITY , *HADRONS - Abstract
Since December 2010 the CMD-3 and SND detectors detectors collect data at the VEPP-2000 electron-positron collider. In 2013-2015 the injection facility of the collider has undergone an upgrade of the injection system. The new BINP injection complex has been connected to the VEPP-2000 collider, so the restrictions connected to the lack of positrons and limited beam energy transfer do not apply any more. The collider luminosity in whole energy range is restricted now only by beam-beam effects. VEPP-2000 collider started to collect data with two detectors at 2016 year. The collected data sample since 2010 corresponds more than 100 pb-1 of integrated luminosity per detector in the c.m. energy between 0.32 and 2GeV. We will report here results of analysis of various hadronic cross sections from detectors both published and preliminary. These measurements are important by themselves and also because of the implications for anomaly of the magnetic moment of a muon (g-2) discrepancy. [ABSTRACT FROM AUTHOR]
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- 2018
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9. DAQ and electronics for SND at VEPP-2000—First test results
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Aulchenko, V.M., Bogdanchikov, A.G., Botov, A.A., Bukin, D.A., Bukin, M.A., Chekushkin, E.A., Dimova, T.V., Druzhinin, V.P., Korol, A.A., Koshuba, S.V., Tekutiev, A.I., and Usov, Yu.V.
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ACQUISITION of data , *COLLIDERS (Nuclear physics) , *COMPUTER software , *CALORIMETERS , *COSMIC rays , *PHYSICS experiments , *COMPUTER architecture - Abstract
Abstract: The SND data acquisition system for experiments at VEPP-2000 collider is presented. Readout electronics, software architecture, key components are summarized. System was tested and used on the cosmics and VEPP-2000 collision events. [Copyright &y& Elsevier]
- Published
- 2009
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10. First results of spherical neutral detector (SND) experiments at VEPP-2000
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Achasov, M.N., Barnyakov, A.Yu., Beloborodov, K.I., Berdyugin, A.V., Berkaev, D.E., Bogdanchikov, A.G., Botov, A.A., Bukin, D.A., Vasiljev, A.V., Golubev, V.B., Grevtsov, K.I., Dimova, T.V., Druzhinin, V.P., Kardapoltsev, L.V., Kovrizhin, D.P., Koop, I.A., Korol, A.A., Koshuba, S.V., Kravchenko, E.A., and Martin, K.A.
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NUCLEAR counters , *PHYSICS experiments , *COLLIDERS (Nuclear physics) , *NUCLEAR energy , *LUMINESCENCE , *ANNIHILATION reactions , *NUCLEAR cross sections - Abstract
Abstract: Preliminary results of the first experiments at the new VEPP-2000 collider are presented. The experiments have been carried out in the center of mass energy range 1–2 GeV with instant luminosity – and total integrated luminosity of about . The main annihilation cross sections, , have been measured. The cross section of nucleon–antinucleon production is also presented. [Copyright &y& Elsevier]
- Published
- 2012
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11. First results on the nucleon form factors from SND
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Achasov, M.N., Barnyakov, A.Yu., Beloborodov, K.I., Berdugin, A.V., Berkaev, D.E., Bogdanchikov, A.G., Borisov, A.A., Botov, A.A., Bukin, D.A., Dimova, T.V., Druzhinin, V.P., Golubev, V.B., Grevtsov, K.A., Kardapoltsev, L.V., Kharlamov, A.G., Koop, I.A., Korol, A.A., Koshuba, S.V., Kovrizhin, D.P., and Lysenko, A.P.
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PARTICLES (Nuclear physics) , *NUCLEAR counters , *NUCLEAR cross sections , *LUMINESCENCE , *ACQUISITION of data , *DATA analysis - Abstract
Results of the first measurements of the cross sections for the and with the SND detector are presented. The analysis is based on data with integrated luminosity of , collected in 2011 by the SND detector at the VEPP-2000 collider in the energy range above nucleon production threshold. [ABSTRACT FROM AUTHOR]
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- 2012
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12. First results of SND experiments at VEPP-2000
- Author
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Achasov, M.N., Aulchenko, V.M., Barnyakov, A.Yu., Beloborodov, K.I., Berdugin, A.V., Berkaev, D.E., Bogdanchikov, A.G., Botov, A.A., Bukin, D.A., Golubev, V.B., Grevtsov, K.I., Dimova, T.V., Druzhinin, V.P., Zemlyansky, I.M., Kardapoltsev, L.V., Kharlamov, A.G., Kirpotin, A.N., Kovrizhin, D.P., Koop, I.A., and Korol, A.A.
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NUCLEAR cross sections , *NUCLEAR counters , *COLLIDERS (Nuclear physics) , *ACQUISITION of data , *BAND gaps , *PHYSICS experiments - Abstract
Preliminary results on cross sections obtained with SND detector at VEPP-2000 collider are reported. The data were collected in 2010–2011 in the energy range . [ABSTRACT FROM AUTHOR]
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- 2012
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13. Search for direct production of the f1(1285) resonance in e+e− collisions.
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Achasov, M.N., Barnyakov, A.Yu., Beloborodov, K.I., Berdyugin, A.V., Berkaev, D.E., Bogdanchikov, A.G., Botov, A.A., Dimova, T.V., Druzhinin, V.P., Golubev, V.B., Kardapoltsev, L.V., Kasaev, A.S., Kharlamov, A.G., Koop, I.A., Korol, A.A., Kovrizhin, D.P., Koshuba, S.V., Kupich, A.S., Litvinov, R.A., and Lysenko, A.P.
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LUMINOSITY - Abstract
A search for direct production of the f 1 (1285) resonance in e + e − annihilation is performed with the SND detector at the VEPP-2000 e + e − collider. The analysis is based on data with an integrated luminosity of 15.1 pb−1 accumulated in the center-of-mass energy range 1.2–1.4 GeV. Two e + e − → f 1 (1285) candidate events are found at the peak of the resonance and zero events beyond the resonance. The significance of the e + e − → f 1 (1285) signal is 2.5 σ. The cross section at the maximum of the resonance is found to be σ (e + e − → f 1) = 45 − 24 + 33 pb. The corresponding branching fraction B (f 1 (1285) → e + e −) = (5.1 − 2.7 + 3.7) × 10 − 9. We consider this result as a first indication of the process e + e − → f 1 (1285). The measured branching fraction is consistent with the theoretical prediction. [ABSTRACT FROM AUTHOR]
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- 2020
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14. Spherical Neutral Detector for experiments at VEPP-2000 collider
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Achasov, M.N., Aulchenko, V.M., Barnyakov, A.Yu., Beloborodov, K.I., Berdugin, A.V., Bogdanchikov, A.G., Botov, A.A., Bukin, D.A., Golubev, V.B., Grevtsov, K.I., Dimova, T.V., Druzhinin, V.P., Kardapoltsev, L.V., Kharlamov, A.G., Kovrizhin, D.P., Korol, A.A., Koshuba, S.V., Kravchenko, E.A., Martin, K.A., and Obrazovsky, A.E.
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MUONS , *NUCLEAR counters , *PHYSICS experiments , *COLLISIONS (Nuclear physics) , *PARTICLES (Nuclear physics) , *DRIFT chambers - Abstract
Spherical Neutral Detector (SND) is a general purpose non-magnetic detector for experiments at VEPP-2000 collider in Novosibirsk in the energy range . Charged particle track coordinates are measured using drift and proportional chambers placed in a common gas volume. Particle identification is performed using energy deposition in the drift chamber at low particle momenta and aerogel threshold counters at high particle momenta . Photon energies are measured using 3-layer spherical electromagnetic calorimeter. Muons penetrating the detector and cosmic background muons are detected by the muon system based on proportional tubes and plastic scintillator counters. At present the detector is operating at VEPP-2000. [ABSTRACT FROM AUTHOR]
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- 2012
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