Comparison of heavy-ion transport simulations: Mean-field dynamics in a box

Maria Colonna, Ying Xun Zhang, Yong Jia Wang, Dan Cozma, Pawel Danielewicz, Che Ming Ko, Akira Ono, Manyee Betty Tsang, Rui Wang, Hermann Wolter, Jun Xu, Zhen Zhang, Lie Wen Chen, Hui Gan Cheng, Hannah Elfner, Zhao Qing Feng, Myungkuk Kim, Youngman Kim, Sangyong Jeon, Chang Hwan LeeBao An Li, Qing Feng Li, Zhu Xia Li, Swagata Mallik, Dmytro Oliinychenko, Jun Su, Taesoo Song, Agnieszka Sorensen, Feng Shou Zhang

Research output: Contribution to journalArticlepeer-review

Abstract

Within the transport model evaluation project (TMEP) of simulations for heavy-ion collisions, the mean-field response is examined here. Specifically, zero-sound propagation is considered for neutron-proton symmetric matter enclosed in a periodic box, at zero temperature and around normal density. The results of several transport codes belonging to two families (BUU-like and QMD-like) are compared among each other and to exact calculations. For BUU-like codes, employing the test particle method, the results depend on the combination of the number of test particles and the spread of the profile functions that weight integration over space. These parameters can be properly adapted to give a good reproduction of the analytical zero-sound features. QMD-like codes, using molecular dynamics methods, are characterized by large damping effects, attributable to the fluctuations inherent in their phase-space representation. Moreover, for a given nuclear effective interaction, they generally lead to slower density oscillations, as compared to BUU-like codes. The latter problem is mitigated in the more recent lattice formulation of some of the QMD codes. The significance of these results for the description of real heavy-ion collisions is discussed.

Original languageEnglish
Article number024603
JournalPhysical Review C
Volume104
Issue number2
DOIs
Publication statusPublished - 2021 Aug

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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