384 research outputs found
Measurement of decay rate and parameters at KEDR
Using the inclusive photon spectrum based on a data sample collected at the
peak with the KEDR detector at the VEPP-4M collider, we
measured the rate of the radiative decay as well
as mass and width. Taking into account an asymmetric photon
lineshape we obtained keV, MeV/, MeV.Comment: 6 pages, 3 figure
Measurement of J/psi to eta_c gamma at KEDR
We present a study of the inclusive photon spectra from 5.9 million J/psi
decays collected with the KEDR detector at the VEPP-4M e+e- collider. We
measure the branching fraction of radiative decay J/psi to eta_c gamma, eta_c
width and mass. Our preliminary results are: M(eta_c) = 2979.4+-1.5+-1.9 MeV,
G(eta_c) = 27.8+-5.1+-3.3 MeV, B(J/psi to eta_c gamma) = (2.34+-0.15+-0.40)%.Comment: To be published in Proceedings of the PhiPsi09, Oct. 13-16, 2009,
Beijing, Chin
Measurement of B(J/psi->eta_c gamma) at KEDR
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, Beijin
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The paper proposes a vortex heat generator with energy transformation of the highest state of matter motion into the lowest one as a heat supply source for a mobile object. Energy transformation coefficient indices close or equal to 1 have been obtained as a result of experiments on efficiency of the vortex heat generator. Such results can be explained with the help of the 2nd Bohr quantum postulate. Standard series of certified VTG heat generators has been proposed for heat supply of the mobile object (field hospital).Đ ĐșĐ°ŃĐ”ŃŃĐČĐ” ĐžŃŃĐŸŃĐœĐžĐșĐ° ŃĐ”ĐżĐ»ĐŸŃĐœĐ°Đ±Đ¶Đ”ĐœĐžŃ ĐŒĐŸĐ±ĐžĐ»ŃĐœĐŸĐłĐŸÂ ĐŸĐ±ŃĐ”ĐșŃĐ° ĐżŃĐ”ĐŽĐ»ĐŸĐ¶Đ”ĐœĐČĐžŃ
ŃĐ”ĐČĐŸĐč ŃĐ”ĐżĐ»ĐŸĐłĐ”ĐœĐ”ŃĐ°ŃĐŸŃ Ń ĐżŃĐ”ĐŸĐ±ŃĐ°Đ·ĐŸĐČĐ°ĐœĐžĐ”ĐŒ ŃĐœĐ”ŃгОО ĐČŃŃŃĐ”Đč ŃĐŸŃĐŒŃ ĐŽĐČĐžĐ¶Đ”ĐœĐžŃ ĐŒĐ°ŃĐ”ŃОО ĐČ ĐœĐžĐ·ŃŃŃ. Đ Ń
ĐŸĐŽĐ” ĐŸĐżŃŃĐŸĐČ ĐżĐŸ ĐŸĐżŃĐ”ĐŽĐ”Đ»Đ”ĐœĐžŃ ŃŃŃĐ”ĐșŃĐžĐČĐœĐŸŃŃĐž ĐČĐžŃ
ŃĐ”ĐČĐŸĐłĐŸ ŃĐ”ĐżĐ»ĐŸĐłĐ”ĐœĐ”ŃĐ°ŃĐŸŃĐ° бŃлО ĐżĐŸĐ»ŃŃĐ”ĐœŃ Đ·ĐœĐ°ŃĐ”ĐœĐžŃ ĐșĐŸŃŃŃĐžŃĐžĐ”ĐœŃĐ° ĐżŃĐ”ĐŸĐ±ŃĐ°Đ·ĐŸĐČĐ°ĐœĐžŃ ŃĐœĐ”ŃгОО, блОзĐșОД Đž ŃĐ°ĐČĐœŃĐ” Đ”ĐŽĐžĐœĐžŃĐ”. йаĐșОД ŃДзŃĐ»ŃŃĐ°ŃŃ ĐŒĐŸĐłŃŃ Đ±ŃŃŃ ĐŸĐ±ŃŃŃĐœĐ”ĐœŃ Ń ĐżĐŸĐŒĐŸŃŃŃ ĐČŃĐŸŃĐŸĐłĐŸ ĐșĐČĐ°ĐœŃĐŸĐČĐŸĐłĐŸ ĐżĐŸŃŃŃлаŃĐ° ĐĐŸŃĐ°. ĐĐ»Ń ŃĐ”ĐżĐ»ĐŸŃĐœĐ°Đ±Đ¶Đ”ĐœĐžŃ ĐŒĐŸĐ±ĐžĐ»ŃĐœĐŸĐłĐŸ ĐŸĐ±ŃĐ”ĐșŃĐ° (ĐżĐŸĐ»Đ”ĐČĐŸĐłĐŸ ĐłĐŸŃпОŃĐ°Đ»Ń) ĐżŃĐ”ĐŽĐ»ĐŸĐ¶Đ”Đœ ŃĐžĐżĐŸŃŃĐŽ ŃĐ”ŃŃĐžŃĐžŃĐžŃĐŸĐČĐ°ĐœĐœŃŃ
ŃĐ”ĐżĐ»ĐŸĐłĐ”ĐœĐ”ŃĐ°ŃĐŸŃĐŸĐČ ĐŒĐ°ŃĐșĐž ĐĐąĐ
Measurement of with KEDR detector
The product of the electronic width of the meson and the branching
fractions of its decay to hadrons and electrons has been measured using the
KEDR detector at the VEPP-4M collider. The obtained values are:
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 meson: These
results are consistent with the previous experiments.Comment: 19 pages, 13 figure
Measurement of the ratio of the leptonic widths for the meson
The ratio of the electron and muon widths of the meson has been
measured using direct decays in the KEDR experiment at the VEPP-4M
electron-positron collider. The result
$\Gamma_{ee}(J/\psi)/\Gamma_{\mu\mu}(J/\psi)=1.0022\pm0.0044\pm0.0048\
(0.65\%)J/\psi$ lepton width
determination with up to 1% accuracy.Comment: 5 pages, 6 figures, 2 table
Single hadron response measurement and calorimeter jet energy scale uncertainty with the ATLAS detector at the LHC
The uncertainty on the calorimeter energy response to jets of particles is
derived for the ATLAS experiment at the Large Hadron Collider (LHC). First, the
calorimeter response to single isolated charged hadrons is measured and
compared to the Monte Carlo simulation using proton-proton collisions at
centre-of-mass energies of sqrt(s) = 900 GeV and 7 TeV collected during 2009
and 2010. Then, using the decay of K_s and Lambda particles, the calorimeter
response to specific types of particles (positively and negatively charged
pions, protons, and anti-protons) is measured and compared to the Monte Carlo
predictions. Finally, the jet energy scale uncertainty is determined by
propagating the response uncertainty for single charged and neutral particles
to jets. The response uncertainty is 2-5% for central isolated hadrons and 1-3%
for the final calorimeter jet energy scale.Comment: 24 pages plus author list (36 pages total), 23 figures, 1 table,
submitted to European Physical Journal
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