Dynamically integrated transport approach for heavy-ion collisions at high baryon density

作者：Akamatsu Yukinao; Asakawa Masayuki; Hirano Tetsufumi; Kitazawa Masakiyo; Morita Kenji; Murase Koichi; Nara Yasushi; Nonaka Chiho; Ohnishi Akira

来源：PHYSICAL REVIEW C, 2018, 98(2): 024909.

DOI：10.1103/PhysRevC.98.024909

We develop a new dynamical model for high-energy heavy-ion collisions in the beam energy region of the highest net-baryon densities on the basis of nonequilibrium microscopic transport model JAM and macroscopic (3 + 1)-dimensional hydrodynamics by utilizing a dynamical initialization method. In this model, dynamical fluidization of a system is controlled by the source terms of the hydrodynamic fields. In addition, time-dependent core-corona separation of hot regions is implemented. We show that our new model describes multiplicities and mean transverse mass in heavy-ion collisions within a beam-energy region of 3 < root s(NN) < 30 GeV. Good agreement of the beam-energy dependence of the K+/pi(+) ratio is obtained, which is explained by the fact that a part of the system is not thermalized in our core-corona approach.

• 出版日期2018-8-14