ROLE OF ECHOCARDIOSCOPY IN ASSESSMENT OF STRUCTURAL-FUNCTIONAL PECULIARITIES OF A RIGHT VENTRICLE OF HEART IN CHILDREN WITH CARDIOGENIC SYNCOPE

In article gives the concept of most clinically significant cardiogenic syncope, being a risk factor of sudden death in children and adults. The informative and. accessible report of echocardiography researches of right ventricle of heart, normal indicators of its anatomic structures and. functional parameters, their clinical interpretation are presented

Coherent production of 3pi states at 25 GeV/c

The coherent production of \u3c0-\u3c0-\u3c0+ states has been studied at 25.7 GeV incident energy with an Al target. The partial-wave analysis of the data confirms the evidence of a I GJPL=1-0- S resonant state in the mass region near to 1.2 GeV, already found by our collaboration at 40 GeV incident energy

Evidence for new 0−S0^{-} S resonances in the π+π−π−\pi^{+} \pi^{-} \pi^{-} systems

Partial-wave analysis has been performed on 120 000 - -+ events coherently produced on nuclear targets in a - beam of 40 GeV/c. Evidence has been found for a 0- S resonance at 1.24 GeV with a width 0.36 GeV. The data also suggest the presence of another 0- S resonance of similar width near 1.8 GeV. These observations can be interpreted as radial excitations of the meson

The (3pi)-nucleon collision in coherent production on nuclei at 40 GeV/c

Coherent 3\piproduction on nine different nuclear targets has been studied using a 40 GeV/c\pi^{-} beam at Serpukhov accelerator. Absorption in nuclear matter of the produced system has been measured by analysing the data on the different nuclear targets. Identical results are obtained from the differential cross sections and from the coherent nuclear cross sections. The 1^{+} waves show a very weak absorption, definitely smaller than 0^{-} and 2^{-} waves. No influence on the absorption comes from the spin-flip amplitudes, which have been found to be negligible in the coherent region

Multiplicity of charged particles in π−\pi^{-} interactions on nuclei at 40 GeV/c

Multiparticle production in \u3c0--nucleus interactions at 40 GeV/c (Fifth Joint CERN-Serpukhov Experiment) has been studied using a spark-chamber technique at the Serpukhov accelerator. The mean multiplicities, the pseudorapidity distributions and the dispersion of the multiplicity distributions of charged particles produced on C, Al, Cu and Pb targets are presented. The data have been analysed, both subtracting and including secondary protons with p 3.4 the average multiplicity is nearly independent of the size (\u3bd) of the target nucleus, while it increases for \u3b7 4) the mean multiplicity on nuclei is smaller than the mean multiplicity on hydrogen. The dependence upon \u3bd in the target fragmentation region is stronger when the emitted protons are included in the pseudorapidity distributions of the secondary particles. The dispersion of the multiplicity distributions for the different nuclear targets versus the mean multiplicity shows the same slope as found by the world statistics on hydrogen and by other experiments on nuclei at different energies. The results are compared with the predictions of the coherent tube model and with the soft hadron-nucleus collision model