Initialization effects of nucleon profile on the π yields in heavy-ion collisions at medium energies. (13th September 2021)

• Record Type: Journal Article
• Authors: Yang, Zu-Xing; Michel, Nicolas; Fan, Xiao-Hua; Zuo, Wei
• Is Part Of: Journal of physics. Volume 48:Number 10(2021)
• Publication Date: 2021-09-13
• Subjects: pion yields -- heavy-ion collisions -- nuclear profile -- shell model; Nuclear physics -- Periodicals; Particles (Nuclear physics) -- Periodicals; Physique nucléaire -- Périodiques; Particules (Physique nucléaire) -- Périodiques; Kernfysica; Elementaire deeltjes; 539.7
• DOI: 10.1088/1361-6471/ac1392
• Languages: English
• ISSNs: 0954-3899

Abstract

Abstract: We study the problem of π production in heavy-ion collisions in the context of the isospin-dependent Boltzmann–Uehling–Uhlenbeck transport model. We generated nucleon densities using two different models, the Skyrme–Hartree–Fock (SHF) model and the configuration interaction shell model (SM). Indeed, inter-nucleon correlations are explicitly taken into account in SM, while they are averaged in the SHF model. As an application of our theoretical frameworks, we calculated the π − and π + yields in collisions of nuclei with A = 30–40 nucleons. We used different harmonic oscillator lengths b HO to generate the harmonic oscillator basis for SM in order to study both theoretical and experimental cases. It is found that the SM framework with b HO = 2.5 fm and SHF can be distinguished by the yield of π mesons, in this case the density distribution calculated by the SM produces more π in the collision. In comparison, SM with b HO = 2.0 fm is distinguished from SHF by the double π − / π + ratios with different large impact parameters, from which one can find that the double π − / π + ratios of SM change smoother and are less than those of SHF.