Initialization effects of nucleon profile on the π yields in heavy-ion collisions at medium energies
| Autor: | Xiao-Hua Fan, Nicolas Michel, Zu-Xing Yang, Wei Zuo |
|---|---|
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Journal of Physics G: Nuclear and Particle Physics. 48:105105 |
| ISSN: | 1361-6471 0954-3899 |
| DOI: | 10.1088/1361-6471/ac1392 |
| Popis: | We study a problem of $\pi$ production in heavy ion collisions in the context of the Isospin-dependent Boltzmann-Uehling-Uhlenbeck (IBUU) transport model. We generated nucleon densities using two different models, the Skyrme-Hartree-Fock (SHF) model and 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 $\pi^{-}$ and $\pi^{+}$ 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 SM framework with $b_{HO}$ = 2.5 fm and SHF can be distinguished by the yield of $\pi$ mesons, in this case the density distribution calculated by the shell model produces more $\pi$ in the collision. In comparison, SM with $b_{HO}$ = 2.0 fm is characterized from SHF by the double $\pi^{-}/\pi^{+}$ ratios with different large impact parameters, from which one can find the double $\pi^{-}/\pi^{+}$ ratios of SM change smoother and are less than those of SHF. Comment: 7 pages, 4 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|