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The Fourier harmonics, v 2 and v 3 of negative pions are measured at center-of-mass energy per nucleon pair of s NN = 17.3 GeV around midrapidity by the CERES/NA45 experiment at the CERN SPS in 0–30% central PbAu collisions with a mean centrality of 5.5%. The analysis is performed in two centrality bins as a function of the transverse momentum p T from 0.05 GeV/ c to more than 2 GeV/ c . This is the first measurement of the v 3 1 / 3 / v 2 1 / 2 ratio as a function of transverse momentum at SPS energies, that reveals, independently of the hydrodynamic models, hydrodynamic behavior of the formed system. For p T above 0.5 GeV/ c , the ratio is nearly flat in accordance with the hydrodynamic prediction and as previously observed by the ATLAS and ALICE experiments at the much higher LHC energies. The results are also compared with the SMASH-vHLLE hybrid model predictions, as well as with the SMASH model applied alone.

The Fourier harmonics,$$v_2$$v 2 and$$v_3$$v 3 of negative pions are measured at center-of-mass energy per nucleon pair of$$\\sqrt{s_{\\textrm{NN}}}$$s NN = 17.3 GeV around midrapidity by the CERES/NA45 experiment at the CERN SPS in 0–30% central PbAu collisions with a mean centrality of 5.5%. The analysis is performed in two centrality bins as a function of the transverse momentum$$\\mathrm {p_{\\textrm{T}}}$$p T from 0.05 GeV/ c to more than 2 GeV/ c . This is the first measurement of the$$v^{1/3}_{3}/v^{1/2}_{2}$$v 3 1 / 3 / v 2 1 / 2 ratio as a function of transverse momentum at SPS energies, that reveals, independently of the hydrodynamic models, hydrodynamic behavior of the formed system. For$$\\mathrm {p_{\\textrm{T}}}$$p T above 0.5 GeV/ c , the ratio is nearly flat in accordance with the hydrodynamic prediction and as previously observed by the ATLAS and ALICE experiments at the much higher LHC energies. The results are also compared with the SMASH-vHLLE hybrid model predictions, as well as with the SMASH model applied alone.

The article describes the basic technical solutions and the composition of units for laser dismantling of spent fuel assemblies and cutting of fuel rods for reactors with a liquid-metal coolant during the processing of spent nuclear fuel. The use of lasers as part of robotic and automated complexes for fuel assembly dismantling and fuel rod fragmentation will reduce the loss of valuable fuel materials, prevent their entrainment, reduce the cost of processing, minimize the contamination of solid radioactive waste with fission products, and optimize primary operations in general.

The new JINR project [1] is aimed at studies of highly excited nuclear matter created in nuclei by a high-energy deuteron beam. The matter is studied through observation of its particular decay products - pairs of energetic particles with a wide opening angle, close to 180°. The new precision hybrid magnetic spectrometer SCAN-3 is to be built for detecting charged (π±, K±, p) and neutral (n) particles produced at the JINR Nuclotron internal target in dA collisions. One of the main and complex tasks is a study of low-energy ηA interaction and a search for η-bound states (η-mesic nuclei). Basic elements of the spectrometer and its characteristics are discussed in the article.

In a joint experiment the TAPS and CERES collaborations have studied the production of the neutral mesons and in 450 GeV p-Be and p-Au collisions at the CERN SPS. The mesons were identified by their , , and decay modes. The cross sections were measured down to very low ( 20 MeV/c) near mid-rapidity (). The and cross sections are smaller than expected from extrapolations of earlier data to low . Integrated over all , the ratios and / are lower by about 25% compared to previously published values. The reduction may be attributed to the large number of low pions from decays of heavier mesons. In addition, we have studied the dependence of neutral meson production on the mass of the nuclear target and find it in good agreement with previous measurements of charged mesons.

Abstract The Fourier harmonics,$$v_2$$v 2 and$$v_3$$v 3 of negative pions are measured at center-of-mass energy per nucleon pair of$$\\sqrt{s_{\\textrm{NN}}}$$s NN = 17.3 GeV around midrapidity by the CERES/NA45 experiment at the CERN SPS in 0–30% central PbAu collisions with a mean centrality of 5.5%. The analysis is performed in two centrality bins as a function of the transverse momentum$$\\mathrm {p_{\\textrm{T}}}$$p T from 0.05 GeV/c to more than 2 GeV/c. This is the first measurement of the$$v^{1/3}_{3}/v^{1/2}_{2}$$v 3 1 / 3 / v 2 1 / 2 ratio as a function of transverse momentum at SPS energies, that reveals, independently of the hydrodynamic models, hydrodynamic behavior of the formed system. For$$\\mathrm {p_{\\textrm{T}}}$$p T above 0.5 GeV/c, the ratio is nearly flat in accordance with the hydrodynamic prediction and as previously observed by the ATLAS and ALICE experiments at the much higher LHC energies. The results are also compared with the SMASH-vHLLE hybrid model predictions, as well as with the SMASH model applied alone.

A study of elliptic flow and two-particle azimuthal correlations of charged particles (\\(0.5 < p_{{\\text{T}}} < 2.5\\) GeV/c) and high-\\(p_{\\rm T}\\) pions (\\(1.2 < p_{{\\text{T}}} < 3.5\\) GeV/c) in Pb + Au collisions at 158A GeV/c, close to midrapidity, is presented. Elliptic flow (v2) rises linearly with \\(p_{\\rm T}\\) to a value of about 10\\(\\%\\) at 2 GeV/c. Beyond \\(p_{\\rm T}\\approx\\) 1.5 GeV/c, the slope decreases and possibly indicates a v2 saturation at high \\(p_{\\rm T}\\). Two-pion azimuthal anisotropies for \\(p_{\\rm T} > \\) 1.2 GeV/c exceed the v2 values by about 60\\(\\%\\) in semicentral collisions. This non-flow component is attributed to near-side and away-side jetlike correlations. While the near-side peak remains constant with centrality 0.23\\(\\pm\\)0.03 rad, as expected for fragmentation, the away-side peak experiences broadening and disappears in central collisions.

The Fourier harmonics, \\(v_2\\) and \\(v_3\\) of negative pions are measured at center-of-mass energy per nucleon pair of \\(s_NN\\)= 17.3 GeV around midrapidity by the CERES/NA45 experiment at the CERN SPS in 0--30\\% central PbAu collisions with a mean centrality of 5.5\\%. The analysis is performed in two centrality bins as a function of the transverse momentum \\(p_T\\) from 0.05 GeV/\\(c\\) to more than 2 GeV/\\(c\\). This is the first measurement of the \\(v^1/3_3/v^1/2_2\\) ratio as a function of transverse momentum at SPS energies, that reveals, independently of the hydrodynamic models, hydrodynamic behavior of the formed system. For \\(p_T\\) above 0.5 GeV/\\(c\\), the ratio is nearly flat in accordance with the hydrodynamic prediction and as previously observed by the ATLAS and ALICE experiments at the much higher LHC energies. The results are also compared with the SMASH-vHLLE hybrid model predictions, as well as with the SMASH model applied alone.

The Spin Physics Detector collaboration proposes to install a universal detector in the second interaction point of the NICA collider under construction (JINR, Dubna) to study the spin structure of the proton and deuteron and other spin-related phenomena using a unique possibility to operate with polarized proton and deuteron beams at a collision energy up to 27 GeV and a luminosity up to \\(10^{32}\\) cm\\(^{-2}\\) s\\(^{-1}\\). As the main goal, the experiment aims to provide access to the gluon TMD PDFs in the proton and deuteron, as well as the gluon transversity distribution and tensor PDFs in the deuteron, via the measurement of specific single and double spin asymmetries using different complementary probes such as charmonia, open charm, and prompt photon production processes. Other polarized and unpolarized physics is possible, especially at the first stage of NICA operation with reduced luminosity and collision energy of the proton and ion beams. This document is dedicated exclusively to technical issues of the SPD setup construction.