[en] A method and a program are considered of the track recognition on the event pictures obtained on the six-meter magnetic spectrometers with the optical spark chambers (MAGIC-6). The program restores the event track picture in space based on the data of track measurement on the spark chamber pictures. The program does not use any preliminary instructions on an event topology. The picture measurement is realized by the scanning automatic unit operating in line with the ''Razdan-3'' computer

[en] The results of amplitude analysis of the K₁⁰K₁⁰ system from the πsub(p)sup(-) → K₁⁰K₁⁰n reaction at the 40 GeV/c momentum of incident π^- meson are presented. Do-wave propagation in the 1 GeV < Msub(Ksub(1)sup(0)Ksub(1)sup(0)) < 1.6 GeV range of effective masses is satisfactorily described by superposition of f- and f'-mesons. Indication of existence of additional comparatively narrow 2⁺⁺ state with 1.3 GeV mass statistically insufficient of the ensured one is obtained. Splitting of the wide resonance epsilon(1300) in two narrower g⁺⁺ peaks with 1.26 and 1.42 GeV masses observed earlier is proved in the S-wave

[en] The resonance with the mass 3075±30 MeV/c², width 170±80 MeV/c² and spin 4 was found in the π^-p → K_S⁰K_S⁰n reaction by incident momentum 40 GeV?c

[en] Λ anti Λ system produced in the π^-p interaction at incident pion momentum 4O GeV/c is investigated. The bump with M(Λ anti Λ)=3430 MeV/c², GITA approximately 40 NeV/c², is observed in the mass spectrum of Λ anti Λ system. The angular distribution of Λ anti Λ in this region does not contradict Jsup(PC)=2. The spin state and spherical harmonic momenta analysis in the mass range of 2.23-3.0 GeV/c² gives strong indications on the existence three states with the masses of 2400+-40 MeV/c², 2510+-25 MeV/c², 2820+-40 MeV/c² and the widths of 65+-50 MeV/c², 124+-53 MeV/c², 132+-80 MeV/c². The preferred quantum numbers of these states (Jsup(PC)) are 3^+-, 2⁺⁺ and 4⁺⁺, respectively

[en] Effective mass spectrum and angular distributions of 322 events of the π^-p→Λ anti Λn reaction at 40 GeV/c momentum have been obtained. Resonance structures for 2295, 2400, 2535 (with possible branching to 2495 and 2564) and 2802 MeV masses have been found. The most probable values of quantum numbers for the found resonances have been determined as 2⁺⁺, 0^-+, 6⁺⁺ (3^-- and 6⁺⁺), correspondingly, on the basis of analysis of angular momenta using the common systematics of meson resonances. Values of resonance decay widths are given. Confirmation of earlier observed resonance structure with 3437 MeV mass has been obtained

[en] A method and a program for reproducing a geometrical picture of events on a 3-meter magnetic spectrometer with optical spark chambers are described. The process of restoration of an event registered on a photographic film comprises the following stages: automatic or semiautomatic numbering, restoration of coordinates of a spark in the spark-chamber space, finding of the reaction vertex and recalculation of the track parameters as applied to this point. The track parameters are recalculated by an iterative procedure involving the Newton method, and the equations of motion of a particle are integrated by the Runge-Kutta method. The problem of reproducing the geometrical picture of events has been solved by using a computer with the program ''Geometry''. To reduce computer time in solving the problem, the derivatives are calculated by formulas based on the model of the homogeneous magnetic field. At an average running speed of the M-220 computer amounting to 20.000 operations per second, about 7.5 sec are required to restore the geometrical picture of a single event

[en] We have investigated lambda anti lambda system, produced in the πanti p interaction at incident pion momentum 40 GeV/c. The bump with M (lambda anti lambda) = 3430 MeV/c², Gamma<45 MeV/c², is observed in the mass spectrum of lambda anti lambda system. The angular distribution of lambda anti lambda in this region does not contradict Jsup(PC) = 2^--. The spin state and spherical harmonic momenta analysis in mass range 2.23 +- 3.0 GeV/c² gives strong indications of the existence of two more states with the masses of 2510 +- 25 MeV/c², 2820 +- 40 MeV/c² and the widths of 124 +- 53 MeV/c², 132 +- 80 MeV/c. The preferred quantum numbers of these states (Jsup(PC)) are 2⁺⁺ and 4⁺⁺, respectively. (author)

[en] Results of investigation into π^-p→K_s⁰K_s⁰n reaction under the maximum (2.4-3.6 GeV/c²) K_s⁰K_s⁰ system masses accessible for observation are presented. The reaction was investigated using the 6-m ITEP MIS spectrometer at 40 GeV/c incident beam momentum. 9400 reaction events with cutting by the transmitted momentum t'<0.12 (GeV/c)² are used. X(3075) resonance parameters appeared to be as follows: M=3075±30 MeV/c², G=170±80MeV/c². A conclusion is drawn that X(3075) belongs to a deep daughter trajectory or, possibly, appears to be a member of a glueball family with J^PC=4⁺⁺ spin. States with higher spins in this mass area (in case they exist) should be stroughly suppressed by the centrifugal barrier

[en] We are presenting results of the amplitude analysis of the K⁰/sub S/K⁰/sub S/ system produced in the reaction π^-p→K⁰/sub S/K⁰/sub S/n at the incident π^- meson momentum 40 GeV/c. The behavior of the D₀ wave in the effective-mass region M/sub K//sub <0/K/sup =/<1.6 GeV is satisfactorily described by a superposion of f and f' mesons. We obtained an indication of the existence of an additional relatively narrow (Γ--50 MeV) 2⁺⁺ state with the mass 1.322 +- 0.007 GeV; however, the statistics is not sufficient: its production cross section is 2.9 +- 1.6 nb. The data confirm the splitting in the S-wave of the broad Epsilon(1300) resonance into a pair of narrower peaks in the 0⁺⁺ state with masses 1.26 and 1.42 GeV as was observed previously [A. Etkin et al., Phys. Rev. D 25, 1786 (1982); A. Etkin et al., Phys. Rev. D 25, 2446 (1982)]

[en] In this article we report the results of a study of the reaction π^-p→K/sup o//sub s/K/sup o//sub s/n at the highest masses of the system K/sup o//sub s/K/sup o//sub s/ accessible to observation, namely, 2.4-3.6 GeV/c². This reaction was investigated in the 6-m spectrometer MIS at the Institute of Theoretical and Experimental Physics at an incident beam momentum 40 GeV/c