197 research outputs found
ПАРАМЕТРЫ, СВЯЗАННЫЕ С ОТСУТСТВИЕМ ЗНАЧИМОГО КОРОНАРНОГО АТЕРОСКЛЕРОЗА ПО ДАННЫМ «РЕГИСТРА ПРОВЕДЕННЫХ ОПЕРАЦИЙ КОРОНАРНОЙ АНГИОГРАФИИ»
Aim of the study: the study aimed to reveal the sign of coronary atherosclerosis absence using the factor analysis in patients referred for the coronary angiography. Patients and methods: 9409 patients suspected stable coronary artery disease (CAD) or with confirmed diagnosis of CAD from the «Registry of provided coronary angiography» were included in the study. Results of the study: principal factor described about 59% of the variation and included the burdens of 4 parameters (gender, smoking, significant coronary atherosclerosis and hypothyroidism) and was interpreted as factor of coronary atherosclerosis. Conclusions: it was found that the absence of coronary stenosis was associated with female gender, non-smoking status and hypothyroidism. Цель исследования: используя факторный анализ, установить, какие признаки связаны с отсутствием коронарного атеросклероза у пациентов, направленных на коронарную ангиографию. Пациенты и методы: в исследование вошли 9409 стабильных пациентов из «Регистра проведенных операций коронарной ангиографии» как с подозрением на ишемическую болезнь сердца (ИБС), так и с установленным диагнозом ИБС. Результаты: было изучено 5 факторов, объясняющих до 59% вариабельности изучаемого явления. Первый, наиболее значимый фактор объяснял 14% общей дисперсии, содержал нагрузки 4 переменных (пол пациента, курение, значимый коронарный атеросклероз и гипофункция щитовидной железы) и интерпретировался как фактор коронарного атеросклероза. Выводы: продемонстрирована связь отсутствия коронарного атеросклероза с женским полом, отсутствием курения и наличием гипофункции щитовидной железы.
Measurement of (1020) meson leptonic width with CMD-2 detector at VEPP-2M Collider
The (1020) meson leptonic width has been determined from the combined
analysis of 4 major decay modes of the resonance () studied with the CMD-2 detector at
the VEPP-2M collider. The following value has been obtained:
keV.
The meson parameters in four main decay channels have been also
recalculated: , , , .Comment: 14 pages, 3 figure
Measurement of and between 3.12 and 3.72 GeV at the KEDR detector
Using the KEDR detector at the VEPP-4M collider, we have measured
the values of and 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 at most of energy points with a systematic uncertainty of
about . At the moment it is the most accurate measurement of in
this energy range
Observation of semileptonic decays with CMD-2 detector
The decay has been observed by the CMD-2 detector at
the e^+e^- collider VEPP-2M at Novosibirsk. Of 6 million produced
pairs, events of the decay were selected. The
corresponding branching ratio is . This result is consistent with the evaluation of from the semileptonic rate and lifetime
assuming .Comment: 7 pages, 6 figures, LaTex2e. Submitted to Phys.Lett.
Study of the process e+e- to pi+pi-pi+pi-pi0 with CMD-2 detector
The process e+e- to pi+ pi- pi+ pi- pi0 has been studied in the center of
mass energy range 1280 -- 1380 MeV using 3.0 1/pb of data collected with the
CMD-2 detector in Novosibirsk. Analysis shows that the cross section of the
five pion production is dominated by the contributions of the eta pi+pi- and
omega pi+pi- intermediate states.Comment: 8 pages, 3 figure. Submitted to Phys. Lett.
New precise determination of the \tau lepton mass at KEDR detector
The status of the experiment on the precise lepton mass measurement
running at the VEPP-4M collider with the KEDR detector is reported. The mass
value is evaluated from the cross section behaviour around the
production threshold. The preliminary result based on 6.7 pb of data is
MeV. Using 0.8 pb of data
collected at the peak the preliminary result is also obtained:
eV.Comment: 6 pages, 8 figures; The 9th International Workshop on Tau-Lepton
Physics, Tau0
Superconducting high-field wigglers and wave length shifters in Budker INP
Several high-field superconducting wigglers (SCW) and wavelength shifters (WLS) are fabricated in the Budker INP for generation of synchrotron radiation. Three-pole WLS with the magnetic field of 7.5 T are installed on LSU‑CAMD and BESSY-II storage rings for shifting the radiation spectrum. WLS with the field of 10.3 T will be used for generation of slow positrons on SPring-8. Creation of a 13-pole 7 T wiggler for the BESSY-II and 45-pole 3.5 T wiggler for ELETTRA now is finished. The main characteristics, design features and synchrotron radiation properties of SCW and WLS created in the Budker INP are presented in this article
High-statistics measurement of the pion form factor in the rho-meson energy range with the CMD-2 detector
We present a measurement of the pion form factor based on e+e- annihilation
data from the CMD-2 detector in the energy range 0.6<sqrt(s)<1.0 GeV with a
systematic uncertainty of 0.8%. A data sample is five times larger than that
used in our previous measurement.Comment: 18 pages, 10 figures. Added comparison with KLOE measurement, minor
updates. Accepted by PL
Study of the Process in the C.M.Energy Range 1.05-1.38 GeV with CMD-2
The process has been studied with the CMD-2 detector
using about 950 events detected in the center-of-mass energy range from 1.05 to
1.38 GeV. The cross section exceeds the expectation based on the contributions
of the rho(770), omega(782) and phi(1020) mesons only.Comment: 12 pages, 3 figures, uses elsart.cls, submitted to Physics Letters
Observation of the conversion decay at CMD-2
Using 15.1^{-1} of data collected by CMD-2 in the -meson energy range,
the branching ratio of the conversion decay has been
measured for the first time: B(\phi\to\pi^0e^+e^-) = (1.22 \pm 0.34 \pm 0.21)
\cdot 10 ^{-5}.Comment: 13 pages, 6 PostScript figures, uses refmerge.sty. To be published in
Phys. Lett.
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