[en] Meson system properties have been studied using statistics of 13.2 thousand events from p-barp-interactions at 32 GeV/c with n_ch≥4 involving the leading proton and antiproton. It is shown that with the growth of the effective mass of the pion system its shape in the principle axis frame becomes more elongated and collimation of charged mesons is somewhat higher than in the e⁺e^- annihilation at the same energies. It is found out that the charged mesons from events with two leading particles have harder X_R spectrum (X_R=2p/M_MS, where p-meson system (MS) momentum in rest system) and smaller multiplicity, than mesons from the e⁺e^- annihilation of the same value of √s which may be caused by the specific kinematic properties of the sample used

[en] Short-range interference correlations between identical pions are found in anti pp interactions at 32 GeV/c. According to Kopylov-Podgoretsky mechanism, the pion emission range is determined to be of about 2 fm. This magnitude is comparable to the corresponding values obtained in other hadronic interactions. It is shown that the estimates of the longitudinal and transverse dimensions of the pion emission range are in good consistence

[en] In a statistics of 13 200 events of bar pp interactions at 32 GeV/c with a charged-particle multiplicity n_ch ≥4 in which there are a leading proton and a leading antiproton, we have carried out a study of the properties of the meson system. It has been shown that with increase of the effective mass, its shape in the system of principal axes becomes more drawn out, and here the degree of collimation of the charged mesons is somewhat higher than in e⁺e- annihilation at similar energies. It has been established that charged mesons from events with two leading particles have a harder x_R spectrum and a smaller multiplicity than mesons from e⁺e- annihilation at the same values of (s)^1/2 , which may be the consequence of the specific kinematic properties of the sample used

[en] Λ-hyperon polarization in p-barp -> Λ + Χ, p-barp -> ΛΚ⁰_s + Χ, p-barp -> ΛΛ-bar + Χ reactions at 32 GeV/c is investigated using Mirabelle buble chamber of the Serpukhov accelerator. 5838 events of Λ-hyperon production are analyzed. Dependences of Λ-hyperon polarization on the transfered momenta and Feynmann X-variable are found. Λ-hyperon polarization value in the processes under investigation equals P_Λ = -0.16 ± 0.04. 6 refs.; 3 figs

[en] The results of methodical investigations on separation of the channels with one neutral particle in K^-p interactions at 32 GeV/c are given. On the basis of the calculations according to the GRIND program separated are the following exclusive reactions: K^-p→K^-p+m(π⁺π^-)+π⁰, K^-p→ anti Ksub(visible)sup(0)pπsup(-) + m(π⁺π^-)+π⁰, K^-p→π^-p(+mπ⁺π^-)+ anti Ksub(visible)sup(0), K^-p→K^-π⁺+m(π⁺π^-)+N, where m=0, 1, 2. The reaction cross section with π⁰, Ksub(visible)sup(0) and N particles are estimated. The dependence of the reaction cross sections on energy is given. The accuracy of measurement of the particle kinematic parameters in the K^-p interactions permits rather reliably separate the exclusive channels with one invisible π^- meson at > 2 charged particle multiplicity. Separation of the channels with invisible K⁰ meson is impeded by great admixtures from kinematically indistinguishable processes with one or two π⁰ mesons and relatively small cross section of these channels. The energy dependence of the channel cross sections with one π⁰ meson in 4- and 6-ray events is analogous to the behaviour of the cross sections of the corresponding channels without π⁰ meson at Psub(labor) > 10 GeV/c

[en] The main characteristics of six-particle final states in pp and bar pp interactions at 32 GeV/c are studied. The proton and π^±-meson spectra in p²_T and p_x in the reactions bar pp→ bar pp2π⁺2π^- and pp→pp2π⁺2π^- are compared. The cross sections for production of the resonances δ⁺⁺(1232) and ρ⁰(770) are found. 7 refs., 6 figs., 2 tabs

[en] In the present work the authors give the main characteristics of exclusive reactions in pp interactions at 32.1 GeV/c. They have determined the cross sections for exclusive reactions in pp interactions, and have studied the characteristics of elastic scattering and the four-particle final state. They study the processes of proton diffractions dissociation. The experimental data are compared with results obtained for anti pp interactions at 32.1 GeV/c

[en] Experimental investigation of spin alignment of rho deg (770) meson is inclusive K^-p and anti pp interactions at 32 GeV/c was conducted. Differential angular cross sections for π^- meson from rho deg (770) resonance decay are investigated. Distribution of (π⁺π^-)-pairs from inclusive anti pp → π⁺π^-+X process with respect of effective masses are presented

[en] The inclusive production of Ksup(*)sup(+-)(890), rho⁰(770), ω⁰(780) and f⁰(1,270) mesons is studied in anti pp experiment at 32 GeV/c in the MIRABELLE bubble chamber by the analysis of (K⁰πsup(+-)) and (π⁺π^-) invariant mass distributions. The inclusive cross sections are sigma(Ksup(*)sup(+-))=2.45+-0.30 mb, sigma(rho⁰)=8.8+-0.9 mb, sigma(ω⁰)approx. equal to6.2 mb, and sigma(f⁰)=2.2+-0.7 mb. The C.M. longitudinal distribution of the Ksup(*)sup(+-)(890) is slightly shifted to the primary particles fragmentation regions; the rho⁰ is produced more centrally. The studied mesons alone are responsible for 40% of final state pions. The production features of various resonances are compared with quark models predictions. (orig.)

[en] Angular distributions of particles in the proper system of the diffraction cluster have been investigated in the bar pp→ bar pX reaction at 32 GeV. It is shown that secondary protons, neutrons, and Λ hyperons are sharply collimated in this system in the direction of motion of the primary proton. Mesons are emitted preferentially in the backward direction. The properties of the background (nondiffraction) events in the reaction bar pp→∼(Δ⁺⁺)X are similar to the properties of diffraction events with the same values of the mass of the cluster X