The results obtained by measuring, at the U-70 accelerator in Protvino, the single-spin asymmetry A N in the reaction p + p └ → π0 + X at a beam energy of 50 GeV in the Feynman variable range of −0.6 < x F < −0.1 are presented. The asymmetry A N is close to zero at small |x F | and grows in magnitude with |x F |, reaching 6.4% in the region of |x F | > 0.25. The results of these measurements agree with data of the E704 experiment on the asymmetry of π 0 mesons at the Fermi National Accelerator Laboratory in the region of polarized-beam fragmentation and with the results of measurements in the region of polarized-target fragmentation that were performed in Protvino by using a 40-GeV π −-meson beam and a 70-GeV proton beam.

A new experiment SPASCHARM devoted to a systematic study of polarization phenomena in hadron-hadron interactions in the energy range 10-70 GeV is under preparation at IHEP (Protvino). The physical observables will be single-spin asymmetries, hyperon polarizations and spin-density matrix elements. A universal setup will detect and identify various neutral and charge particles in the full azimuthal angle and a wide polar angle range. A polarized target is used to measure the SSA. The SPASCHARM sub-detectors are being designed and constructed now. The possibility of obtaining a polarized proton beam for the SPASCHARM experiment from Lambda decays is under study.

The first stage of the proposed polarization program SPASCHARM includes the measurements of the single-spin asymmetry (SSA) in exclusive and inclusive reactions with production of stable hadrons and the light meson and baryon resonances.In this study we foresee of using the variety of the unpolarized beams (pions, kaons, protons and antiprotons) in the energy range of 30-60 GeV. The polarized proton and deuteron targets will be used for revealing the flavor and isotopic spin dependencies of the polarization phenomena. The neutral and charged particles in the final state will be detected.

A new single-spin asymmetry A(N) measurement has been carried out at IHEP at 50 GeV. A(N) was found to be -(6.2 +/- 1.5)% in the polarized target fragmentation region at -0.6 < x(F)<-0.25. The result proves that asymmetry does not depend on beam energy. A review of polarization results from Protvino as well as a proposal of the new experiment SPASCHARM are also presented.

Single-spin asymmetries $A_N$ in reactions p+p(pol)->π^0 + X and π^-+p(pol)->π^0 + X at 50 and 40 GeV/c respectively behave in drastically different ways in function of transverse momentum in the central region. At the same time $A_N$ in the polarized proton fragmentation region of these reactions are practically coinciding. Our new data on the analyzing power at 50 GeV/c in the polarized proton fragmentation region in reaction p+p(pol)->π^0 + X confirm this conclusion with better statistics and coincide with our previous data at 70 GeV/c for the same reaction.

The new polarization program SPASCHARM is being prepared in Protvino. The program has two stages. The first stage is dedicated to single-spin asymmetries in the production of miscellaneous light resonances with the use of 34 GeV $π^-$-beam. Inclusive and exclusive reactions will be studied simultaneously. The second stage is dedicated to single-spin and double-spin asymmetries in charmonium production with the use of 70 GeV polarized proton beam which will allow us to understand charmonium hadronic production mechanism and make gluon polarization $Δg(x)$ extraction at large $x$.

New accurate data on the neutron-proton spin-dependent total cross section difference Δ σ L ( np ) at the neutron beam kinetic energies 1.4, 1.7, 1.9 and 2.0 GeV are presented. A number of physical and methodical results on investigation of an elastic np→pn charge exchange process over a few GeV region are also presented. Measurements were carried out at the Synchrophasotron and Nuclotron of the Veksler and Baldin Laboratory of High Energies of the Joint Institute for Nuclear Research.

New accurate results of the neutron-proton spin-dependent total cross section difference -Deltasigma(L) (np) at the neutron beam kinetic energies 1.4, 1.7, 1.9 and 2.0 GeV are presented. A fast decrease Of -Deltasigma(L)(np) with increasing energy above 1.1 GeV and a structure in the energy dependence around 1.8 GeV, first observed from our previous data, seem to be well pronounced. The -Deltasigma(L) quantities for isosinglet state I = 0, deduced from the measured Deltasigma(L)(np) values and known -Deltasigma(L)(pp) data, are also given. Preparation of the spin-correlation parameters A(ookk)(np) and A(oonn)(np) measurements is in progress. Measurements were carried out at the Synchrophasotron and Nuclotron of the Veksler and Baldin Laboratory of High Energies of the Joint Institute for Nuclear Research, The aims of these studies is to determine for the first time the imaginary and real parts of the np spin-dependent forward scattering amplitudes over energy range of these Dubna accelerators.

New accurate data of the neutron-proton spin-dependent total-cross-section difference Δσ L(np) at the neutron-beam kinetic energies 1.39, 1.69, 1.89, and 1.99 GeV are presented. In general, these data complete the measurements of energy dependence of Δσ L(np) over the Dubna Synchrophasotron energy region. Measurements were carried out at the Synchrophasotron of the Veksler and Baldin Laboratory of High Energies of the Joint Institute for Nuclear Research. The quasi-monochromatic neutron beam was produced by breakup of extracted polarized deuterons. The deuteron (and hence neutron) polarization direction was flipped every accelerator burst. The initial transverse (with respect to beam momentum) neutron polarization was changed to a longitudinal one and longitudinally polarized neutrons were transmitted through the large proton longitudinally polarized target. The target polarization direction was inverted after one to two days of measurements. Four different combinations of the beam and target parallel and antiparallel polarization directions, both oriented along the neutron-beam momentum, were used at each energy. A fast decrease in −Δσ L(np) with increasing energy above 1.1 GeV and a structure in the energy dependence around 1.8 GeV, first observed from our previous data, seem to be well revealed. The new results are also compared with model predictions and with phase-shift analysis fits. The Δσ L quantities for isosinglet state I = 0, deduced from the measured Δσ L(np) values and known Δσ L(pp) data, are also given. The results of the measurements of unpolarized total cross sections σ 0tot(np) at 1.3, 1.4, and 1.5 GeV and σ 0tot(nC) at 1.4 and 1.5 GeV are presented as well. These data were obtained using the same apparatus and high-intensity unpolarized deuteron beams extracted either from the Synchrophasotron or from the Nuclotron.

New results on energy dependence of the DeltasigmaL(np) over a GeV energy region are presented. Measurements of the np spin dependent total cross section difference DeltasigmaL(np) were carried, out. at the Synchrophasotron of the Laboratory of High Energies of the Joint Institute for Nuclear Research in Dubna. A quasi-monochromatic neutron beam was produced by break-up of accelerated and extracted polarized deuterons. The neutrons were transmitted through a large proton polarized target. The values of DeltasigmaL were measured as a difference between the np total cross sections for parallel and antiparallel beam and target polarizations, both oriented along the beam momentum. In the 2001 data taking run the DeltasigmaL(np) value were measured at 1.4, 1.7, 1.9 and 2.0 GeV: A fast decrease of DeltasigmaL (np) with increasing energy above 1.1 GeV, as it was first seen from our previous data, was confirmed. The obtained results are also compared with model prediction's and with the phase shift analysis fits. The investigations are carrying out within a program of the "DELTA-SIGMA experiment" project. The aim of these studies is to obtain the values of imaginary and real parts of the spin-dependent forward np-scattering amplitudes over the energy range of 1.2-3.7GeV for the first time.

New results on energy dependence of the Deltasigma(L)(np) over a GeV energy region are presented. Measurements of the np spin-dependent total cross section difference Deltasigma(L)(np) were carried out at the Synchrophasotron of the Laboratory of High Energies of the Joint Institute for Nuclear Research in Dubna. A quasi-monochromatic neutron beam was produced by break-up of accelerated and extracted polarized deuterons. The neutrons were transmitted through a large proton polarized target. The values of Deltasigma(L) were measured as a difference between the np total cross sections for parallel and antiparallel beam and target polarizations, both oriented along the beam momentum. In 2001 data taking rim the Deltasigma(L)(np) value were measured at 1.4, 1.7, 1.9 and 2.0 GeV. A fast decrease of Deltasigma(L)(np) with increasing energy above 1. 1 GeV, as it was first seen from our previous data, was confirmed. The obtained results are also compared with model predictions and with the phase shift analysis fits. The investigations are carrying out under a program of the "DELTA-SIGMA experiment" project. The aims of these studies are to obtain the values of imaginary and real parts of the spin-dependent forward np-scattering amplitudes over the energy range of 1.2-3.7 GeV for the first time.

Preliminary results of the Δσ L ( np ) at 1.4, 1.7, 1.9 and 2.0 GeV are presented. They were obtained during the two data-taking runs at the JINR Dubna Synchrophasotron in 2001 and complete the existing data above 1.1 GeV. The data analysis is in progress. The aim of the present studies is to determine the imaginary and real parts of the np spin-dependent forward scattering amplitudes over this energy range.

New data on the spin-dependent np observables measured with quasi-monochromatic polarized neutron beam in the energy region from 1.2 to 3.7 GeV are presented. Further measurements of np scattering observables using the JINR LHE polarization facility (longitudinal and transverse polarized neutron beams and a polarized proton target) are discussed. The aim of these studies is to determine the imaginary and real parts of the forward scattering amplitudes for np and for isospin I=0 systems above 1.1 GeV.

New results for the np spin-dependent total cross section difference Δσ p ( np ) at neutron beam kinetic energies of 1.59, 1.79 and 2.20 GeV are presented. Measurements of the Δσ p ( np ) energy dependence were carried out at the Synchrophasotron of the Laboratory of High Energies of the Joint Institute for Nuclear Research in Dubna. The values of Δσ L were measured as a difference between the np total cross sections for parallel and antiparallel beam and target polarizations, both oriented along the beam momentum. A fast decrease of Δσ p ( np ) with increasing energy above 1.1 GeV, as it was first seen from our previous data, was confirmed. The new results are also compared with model predictions and with the phase shift analysis fits. The Δσ L quantities for isosinglet state I=0, deduced from the measured values of Δσ p ( np ) and known Δσ p ( pp ) data, are given.

We establish existence conditions for a random integral manifold of a certain class of differential systems with unbounded sectorial operator and random right-hand side in a Banach space.

An automated setup for measuring single-spin asymmetry in inclusive neutral-meson production at the 14th channel of the IFVE accelerator (IHEP) is described. The experiments were conducted using both the secondary pion beam with 40-GeV/c momentum and the primary proton beam with 70-GeV energy, brought to the setup zone by means of a bent single crystal. The main characteristics of the detectors and data-acquisition system are presented.