Spherical Neutral Detector for experiments at VEPP-2000 collider

2012 ◽  
Vol 225-227 ◽  
pp. 66-68 ◽  
Author(s):  
M.N. Achasov ◽  
V.M. Aulchenko ◽  
A.Yu. Barnyakov ◽  
K.I. Beloborodov ◽  
A.V. Berdugin ◽  
...  
Keyword(s):  
Spherical Neutral Detector

scholarly journals Spherical neutral detector for VEPP-2M collider

2000 ◽  
Vol 449 (1-2) ◽  
pp. 125-139 ◽  
Author(s):  
M.N Achasov ◽  
V.M Aulchenko ◽  
S.E Baru ◽  
K.I Beloborodov ◽  
A.V Berdyugin ◽  
...  
Keyword(s):  
Spherical Neutral Detector

Study of process e + e − → π+π−π0π0 at energies √s < 1 GeV with the spherical neutral detector

2009 ◽  
Vol 109 (3) ◽  
pp. 379-392 ◽  
Author(s):  
M. N. Achasov ◽  
K. I. Beloborodov ◽  
A. V. Berdyugin ◽  
A. A. Botov ◽  
A. V. Vasil’ev ◽  
...  
Keyword(s):  
Spherical Neutral Detector

Spherical Neutral Detector tracking system for experiments at VEPP-2000 collider

2007 ◽  
Vol 581 (1-2) ◽  
pp. 115-118 ◽  
Author(s):  
V.M. Aulchenko ◽  
A.G. Bogdanchikov ◽  
A.A. Botov ◽  
A.D. Bukin ◽  
D.A. Bukin ◽  
...  
Keyword(s):  
Tracking System ◽  
Spherical Neutral Detector

scholarly journals R-VALUES FROM LOW ENERGY e+e-ANNIHILATION

2000 ◽  
Vol 15 (24) ◽  
pp. 3739-3769 ◽  
Author(s):  
ZHENGGUO ZHAO
Keyword(s):  
Review Article ◽  
Low Energy ◽  
Coupling Constant ◽  
Running Coupling ◽  
Electron Positron ◽  
Running Coupling Constant ◽  
The Standard Model ◽  
Magnetic Detector ◽  
Spherical Neutral Detector ◽  
Precision Test

The QED running coupling constant α(s) and the anomalous magnetic moment of muon aμare two fundamental quantities for the precision test of the Standard Model (SM). The current uncertainties on α(s) and aμare dominated by the contribution from the R-values measured about 20 years ago with an averaged uncertainty of 15% in the energy region below 5 GeV. This review article summarizes the recent measurements of R-values in low energy e+e-annihilation. The new experiments aimed at reducing the uncertainties in R-values and performed with the upgraded Beijing Spectrometer (BESII) at Beijing Electron Positron Collider (BEPC) in Beijing and with Cryogenic Magnetic Detector, CMD-2 and SND (Spherical Neutral Detector) at VEEP-2M in Novosibirsk are reviewed and discussed.

scholarly journals Update of the e + e − → π+π− cross section measured by the spherical neutral detector in the energy region 400 < √s < 1000 MeV

2006 ◽  
Vol 103 (3) ◽  
pp. 380-384 ◽  
Author(s):  
M. N. Achasov ◽  
K. I. Beloborodov ◽  
A. V. Berdyugin ◽  
A. G. Bogdanchikov ◽  
A. V. Bozhenok ◽  
...  
Keyword(s):  
Cross Section ◽  
Energy Region ◽  
Spherical Neutral Detector

scholarly journals Study of thee+e−→ηγprocess with Spherical Neutral Detector at the VEPP-2Me+e−collider

2006 ◽  
Vol 74 (1) ◽  
Author(s):  
M. N. Achasov ◽  
V. M. Aulchenko ◽  
K. I. Beloborodov ◽  
A. V. Berdyugin ◽  
A. G. Bogdanchikov ◽  
...  
Keyword(s):  
Spherical Neutral Detector

Searching for the process e+e- → K+K-π0 in experiments with the spherical neutral detector at VEPP-2M

2010 ◽  
Vol 110 (1) ◽  
pp. 26-33
Author(s):  
M. N. Achasov ◽  
K. I. Beloborodov ◽  
A. V. Berdyugin ◽  
A. G. Bogdanchikov ◽  
D. A. Bukin ◽  
...  
Keyword(s):  
Spherical Neutral Detector

Analysis of e + e −→π+π−π+π− and e + e −→π+π−π0π0 processes in the energy range of $$\sqrt 2 = 0.98 - 1.38 GeV$$ in experiments with a spherical neutral detector

2003 ◽  
Vol 96 (5) ◽  
pp. 789-800 ◽  
Author(s):  
M. N. Achasov ◽  
K. I. Beloborodov ◽  
A. V. Berdyugin ◽  
A. G. Bogdanchikov ◽  
A. V. Bozhenok ◽  
...  
Keyword(s):  
Energy Range ◽  
Spherical Neutral Detector

scholarly journals Measurement of the e+e− → π+π− process cross section with the SND detector at the VEPP-2000 collider in the energy region 0.525 < $$ \sqrt{s} $$ < 0.883 GeV

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
M. N. Achasov ◽  
◽  
A. A. Baykov ◽  
A. Yu. Barnyakov ◽  
K. I. Beloborodov ◽  
...  
Keyword(s):  
Cross Section ◽  
Systematic Uncertainty ◽  
Energy Region ◽  
The Cross ◽  
Spherical Neutral Detector ◽  
Integrated Luminosity

Abstract The cross section of the process e+e− → π+π− has been measured in the Spherical Neutral Detector (SND) experiment at the VEPP-2000 e+e− collider VEPP-2000 in the energy region 525 <$$ \sqrt{s} $$ s < 883 MeV. The measurement is based on data with an integrated luminosity of about 4.6 pb−1. The systematic uncertainty of the cross section determination is 0.8% at $$ \sqrt{s} $$ s > 0.600 GeV. The ρ meson parameters are obtained as mρ = 775.3 ± 0.5 ± 0.6 MeV, Γρ = 145.6 ± 0.6 ± 0.8 MeV, Bρ→e+e− × Bρ→π+π− = (4.89 ± 0.02 ± 0.04) × 10−5, and the parameters of the e+e− → ω → π+π− process, suppressed by G-parity, as Bω→e+e− × Bω→π+π− = (1.32 ± 0.06 ± 0.02) × 10−6 and and ϕρω = 110.7 ± 1.5 ± 1.0 degrees.

First results of spherical neutral detector (SND) experiments at VEPP-2000

2012 ◽  
Vol 67 (2) ◽  
pp. 594-598 ◽  
Author(s):  
M.N. Achasov ◽  
A.Yu. Barnyakov ◽  
K.I. Beloborodov ◽  
A.V. Berdyugin ◽  
D.E. Berkaev ◽  
...  
Keyword(s):  
First Results ◽  
Spherical Neutral Detector
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