M. M. Chumakov

Experimental study of the subthreshold production of K+-mesons in proton-nucleus collisions

Energy dependence of the differential cross sections for the production of K+-mesons with a momentum of 1.28 GeV/c (c is the speed of light) by protons incident on Be, Al, Cu, and Ta nuclei was measured for energies both above and below the K+-meson production threshold in pp collisions. Evidence is given for the dominance of the mechanism of direct production in the experiment. The characteristics of momentum distribution are determined for nucleons in the Be and Al nuclei up to 650 MeV/c. The data cannot be described in the model of nuclear spectral function.

Precise determination of inhomogeneous magnetic field components with a hall probe

Abstract The possibility of precise determination of inhomogeneous magnetic field components with a Hall probe is shown. The adjustment technique, a set of necessary probe calibrations, and the method of mathematical treatment of the results of the measurements are described.

Subthreshold and near-threshold kaon and antikaon production in proton–nucleus reactions

The differential production cross sections of K+ and K− mesons have been measured at the ITEP proton synchrotron in p + Be, p + Cu collisions under a laboratory angle of 10.5°, respectively, at 1.7 and 2.25, 2.4 GeV beam energies. A detailed comparison of these data with the results of calculations within an appropriate folding model for incoherent primary proton–nucleon, secondary pion–nucleon kaon and antikaon production processes and processes associated with the creation of antikaons via the decay of intermediate mesons is given. We show that the strangeness exchange process YN → NNK− gives a small contribution to the antikaon yield in the kinematics of the performed experiment. We argue that in the case when antikaon production processes are dominated by the channels with KK− in the final state, the cross sections of the corresponding reactions are weakly influenced by the in-medium kaon and antikaon mean fields.

Probing of compact baryonic configurations in nuclei in

Inclusive cross sections

A(p,{\bar p})X

\sigma^A=Ed^3{\sigma(X,P_t^2)/d^3p}

reactions and antiproton formation length in nuclear matter

of antiproton and negative pion production on Be, Al, Cu and Ta targets hit by 10 GeV protons were measured at the laboratory angles of 10.5

Study of in-medium ω-meson properties in Ap and pA collisions

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SubthresholdK + production in proton-nucleus collisions as a probe for short range nucleon correlations

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K +-meson production inpBe interactions atT p=2.9 GeV

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Production of Protons and Deuterons Under Angles Near 100-degrees and 130-degrees in Inclusive Reactions on Nuclei Exposed to

. Antiproton cross sections were obtained in both kinematically allowed and kinematically forbidden regions for antiproton production on a free nucleon. The antiproton cross section ratio as a function of the longitudinal variable