A method proposed to preserve the electron beam polarization at the VEPP-4M collider during acceleration with crossing the integer (imperfection) spin resonance at energy E=1763 MeV has been ...successfully applied. It is based on full decompensation of the \( 0.6\times3.3\) Tesla\(\times\)meter integral of the KEDR detector longitudinal magnetic field due to the anti-solenoids 'switched-off'.
Status of the KEDR detector Anashin, V.V; Aulchenko, V.M; Baibusinov, B.O ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
02/2002, Letnik:
478, Številka:
1
Journal Article
Recenzirano
KEDR is a general-purpose detector for experiments at the VEPP-4M e
+e
−-collider in the energy range 2
E=2.0–
12
GeV
. All detector subsystems (except the aerogel Cherenkov counters) have been ...installed into the detector at VEPP-4M. Some preliminary data have been taken in the energy region of the J/Ψ meson. The tuning of the detector and the VEPP-4M collider is in progress. Preliminary results on the detector performance are presented. The future experimental program for the KEDR detector is discussed.
STUDY OF ψ(2S) → μ+μ- DECAY WITH KEDR DETECTOR AULCHENKO, V. M; BALDIN, E. M; BARLADYAN, A. K ...
International Journal of Modern Physics: Conference Series,
2014, Letnik:
35
Journal Article, Conference Proceeding
Recenzirano
Since 2004 the KEDR detector at the VEPP-4M collider has taken several data sets in the ψ(2S) region, acquiring total luminosity of about 7 pb-1, which corresponds to more than 3.5 × 106ψ(2S).
We ...report the preliminary value of Γee × Γμμ/Γ = 19.4 ± 0.4 ± 1.1 eV for ψ(2S).
PARAMETERS OF CHARMONIUM STATES FROM KEDR AULCHENKO, V. M; BALDIN, E. M; BARLADYAN, A. K ...
International Journal of Modern Physics: Conference Series,
2014, Letnik:
35
Journal Article, Conference Proceeding
Recenzirano
Odprti dostop
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/ψ, ψ(2S) and ψ(3770) and J/ψ → ...γηc branching fraction determination.
The authors describe recent results from the KEDR detector at the VEPP-4M collider. They include: a search for narrow resonances between 1.85 and 3.1 GeV, a test of leptonic universality by comparing ...partial widths of the ... resonance into electron and muon pairs, a determination of the main parameters of the ...(2S ) and a measurement of ... (3770) parameters. (ProQuest: ... denotes formulae/symbols omitted.)
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.
Liquid krypton calorimeter for KEDR detector and last prototype results Aulchenko, V.M; Barladyan, A.K; Bondar, A.E ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
09/1996, Letnik:
379, Številka:
3
Journal Article
Recenzirano
The liquid krypton calorimeter for the KEDR-VEPP-4M experiment is described. The experimental results with a prototype, obtained at the tagged photon beam of VEPP-4M in the photon energy region ...between 50 and 4500 MeV, are presented. The results on the energy resolution are in a good agreement with the Monte-Carlo expectations and are equal to 6% and 2% at 100 and 1000 MeV respectively. The spatial resolution is about 1–1.5 mm in a wide energy region and agrees with the expected spatial resolution.
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.
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