Study of nuclear matter in hard proton-nuclei and nuclei-nuclei collisions at the U70 accelerator (FLUKTON project propo
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udy of Nuclear Matter in Hard Proton-Nuclei and Nuclei-Nuclei Collisions at the U70 Accelerator (FLUKTON Project Proposal) N. N. Antonova, A. A. Baldinb, V. A. Viktorova, V. A. Gapienkoa, *, G. S. Gapienkoa, V. N. Gresa, M. A. Ilyushin a, V. A. Korotkova, A. I. Mysnika, A. F. Prudkoglyada, D. S. Pryanikova, A. A. Semaka, A. V. Stavinskyc, V. I. Terekhova, V. Ya. Uglekova, M. N. Ukhanova, B. V. Chuikoa, and S. S. Shimanskyb aNational
Research Center “Kurchatov Institute”—Institute for High Energy Physics, Protvino, 142280 Russia b Joint Institute for Nuclear Research, Dubna, 141980 Russia cNational Research Center Kurchatov Institute, Institute for Experimental and Theoretical Physics, Moscow, 117218 Russia *e-mail: [email protected] Abstract⎯A two-arm spectrometer FLUKTON for investigations in the field of relativistic nuclear physics at U70 energies is proposed to be constructed on base of the existing detector SPIN (IHEP, Protvino). The main objective is to obtain new data on clusters of cold superdense nuclear matter. Interaction of a high intensity proton beam with nuclear targets and an ion beam with liquid hydrogen and nuclear targets will be studied. DOI: 10.1134/S1063779617060041
The main objective of the proposed experiment FLUKTON is to continue the investigation of cold superdense constituents (fluctons) inside nuclear matter that is performed at present at the SPIN setup in proton–nuclear and nuclear–nuclear collisions. The data obtained at SPIN demonstrated for the first time [1] the cumulative effect for charged particles at high transverse momenta (рТ > 2 GeV/c), where, according to theoretical estimates [2], the main contribution should come from the interaction with fluctons. An indication of the local character of proton, pion, and light nuclear fragment (d and t) production was obtained [3, 4]. In other words, it was demonstrated that intranuclear rescattering does not play a noticeable role in particle production at high рТ (рТ > 2 GeV/c). It is proposed to study the properties of multinucleon configurations inside nuclei in correlation measurements in the framework of the new experiment under discussion. Most experimental data on cumulative processes were obtained from cumulative particles emitted from nuclei into the back hemisphere and described in the framework of flucton fragmentation. In the proposed experiment, it is possible to visualize the f lucton by knocking it out and subsequently recording either the flucton or jets from its fragmentation. Figure 1 shows schematically the idea of this experiment. The ion beam with an energy of 10– 20 A GeV hits the hydrogen target. The proton, hit by the flucton, is recorded in the recoil arm in the cumulative kinematic region and serves as the triggering
particle. The flucton (or its fragmentation jet), being knocked out by the proton, moves in the direction of the forward arm. The nuclear residues move in the direction of the beam and do not interfere in the recording of the reaction products. The SPIN data [3] on cumulative particle pro
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