Электронный каталог

Статья

Ivanov, Yu.B.
Global *L Polarization in Heavy-Ion Collisions at High Baryon Density / Yu.B.Ivanov. – Text : electronic // Physical Review C. – 2025. – Vol. 112, No. 1. – P. 014902. – URL: https://doi.org/10.1103/qn56-fvnq.

Based on the model of three-fluid dynamics (3FD), the global Λ polarization (𝑃Λ) is calculated in Au+Au collisions at 3 ≤√𝑠𝑁⁢𝑁≤ 9 GeV, in which high baryon density is achieved. Various contributions to 𝑃Λ are considered: those from the thermal vorticity, meson field, thermal shear, and spin-Hall effect. Feed-down from higher-lying resonances is also taken into account. The results are compared with available data. Special attention is payed to the collision energies of √𝑠𝑁⁢𝑁=3, 3.2, 3.5, 3.9, and 4.5 GeV, for which a thorough scan of the energy, rapidity, and centrality dependence of 𝑃Λ is performed. The results for 3 GeV reasonably well reproduce the corresponding STAR data. While the results at √𝑠𝑁⁢𝑁=3.2, 3.5, 3.9, and 4.5 GeV can be considered as predictions for results of measurements within the STAR fixed-target (STAR-FXT) program that are expected in the nearest future. It is predicted that a broad maximum of 𝑃Λ is reached at √𝑠𝑁⁢𝑁≈3–3.9 GeV, exact position of which depends on the centrality and width of the midrapidity range of observation. Impact of the meson-field, thermal-shear, and spin-Hall-effect contributions to 𝑃Λ is also studied



ОИЯИ = ОИЯИ (JINR)2025