N. N. Antonov, V. A. Viktorov, V. A. Gapienko, G. S. Gapienko, I. V. Lobov, F. N. Novoskol'tsev, A. F. Prudkoglyad, A. A. Semak, I. P. Solodovnikov, V. I. Terekhov, M. N. Ukhanov, S. S. Shimanskii, “Features of the production of antiprotons with high transverse momenta at an angle of $40^\circ$ in collisions of a $50$-GeV proton beam with nuclei”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2024, Volume 119, Issue 1,Pages 3

FIELDS, PARTICLES, AND NUCLEI

Features of the production of antiprotons with high transverse momenta at an angle of $40^\circ$ in collisions of a $50$-GeV proton beam with nuclei

N. N. Antonov^a, V. A. Viktorov^a, V. A. Gapienko^a, G. S. Gapienko^a, I. V. Lobov^a, F. N. Novoskol'tsev^a, A. F. Prudkoglyad^a, A. A. Semak^a, I. P. Solodovnikov^a, V. I. Terekhov^a, M. N. Ukhanov^a, S. S. Shimanskii^b

^a Institute for High Energy Physics, National Research Center Kurchatov Institute, Protvino, Moscow region, 142281 Russia
^b Joint Institute for Nuclear Research, Dubna, Moscow region, 141980 Russia

Abstract: Data on the production of antiprotons at an angle of $40^\circ$ in the laboratory system in collisions of $50$-GeV protons with C, Al, Cu, and W nuclear targets have been obtained in the SPIN experiment (IHEP, Protvino, Russia). Invariant cross sections have been measured at transverse momenta up to $p_T\approx2.6\,$ GeV/c. The analysis of the momentum spectra has shown that multinucleon (multiquark) configurations inside a nucleus are involved in the production of antiprotons.

Received: 27.09.2023
Revised: 15.11.2023
Accepted: 22.11.2023

DOI: 10.31857/S1234567824010014