Abstract
The first data on production of cumulative K+, K– mesons and antiprotons with high transverse momenta outgoing at the lab angle of 40 degrees in proton–nucleus interactions are presented. Inclusive cross sections are studied for the C, Al, Cu, and W targets at the proton beam momentum of 50 GeV/c. The investigated range of transverse momenta from 0.6 to 2.7 GeV/c is partially beyond the proton–nucleon kinematics. The \(\bar {p}\)/π– and K+/K– ratios are identical for all investigated targets within the experimental errors. The data indicate a noticeable contribution of multiparton processes to production of cumulative mesons and antiprotons. The investigations have been performed in the SPIN experiment at the U-70 accelerator.
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ACKNOWLEDGMENTS
The authors are grateful to the directorate of the NRC Kurchatov Institute–IHEP for the support of this research and to the personnel of the accelerator department and the beam department for the efficient operation of the U-70 accelerator and channel 8. The authors are also grateful to S.S. Shimansky for participation in the discussion of the results and to A.T. Golovin for technical assistance in the preparation of the SPIN setup for measurements.
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Antonov, N.N., Gapienko, V.A., Gapienko, G.S. et al. High pt Antiproton and Meson Production in the Cumulative pA Reaction at 50 GeV/c. Phys. Part. Nuclei 53, 366–371 (2022). https://doi.org/10.1134/S1063779622020113
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DOI: https://doi.org/10.1134/S1063779622020113