Proton and kaon production in Au+Au collisions at $\sqrt{s_{\rm NN}}=3$ GeV
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866914528025903104 |
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| author | Liu, Shuang-Jie Wei, Gao-Feng Zhao, Yu-Liang Zhou, Feng-Chu Wang, Zhen |
| author_facet | Liu, Shuang-Jie Wei, Gao-Feng Zhao, Yu-Liang Zhou, Feng-Chu Wang, Zhen |
| contents | Within an extended isospin- and momentum-dependent Boltzmann-Uehling-Uhlenbeck transport model, we study the protons, $K^+$ mesons and $Λ$ hyperons production in Au+Au collisions at $\sqrt{s_{\rm NN}}=3$ GeV. For the collision in 0-10% centrality, we study the transverse momentum spectra and rapidity dependent mean transverse momentum for protons. For the collision in 10-40% centrality, we study the directed and elliptic flows for protons and $K^+$ mesons. The results show that the momentum-dependent nuclear mean field with an incompressibility $K_0=230$ MeV can fit fairly the STAR experimental data, while the momentum-independent nuclear mean field with both $K_0=230$ MeV and $K_0=380$ MeV can only partially describe the experimental results. In addition, we also study the directed and elliptic flows for the associated $Λ$, observations reveal the same conclusions as for kaons. These findings indicate that the momentum dependence of nuclear mean field plays a significant role in understanding nuclear matter properties in heavy-ion collisions at $\sqrt{s_{\rm NN}}=3$ GeV. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_27678 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Proton and kaon production in Au+Au collisions at $\sqrt{s_{\rm NN}}=3$ GeV Liu, Shuang-Jie Wei, Gao-Feng Zhao, Yu-Liang Zhou, Feng-Chu Wang, Zhen Nuclear Theory Nuclear Experiment Within an extended isospin- and momentum-dependent Boltzmann-Uehling-Uhlenbeck transport model, we study the protons, $K^+$ mesons and $Λ$ hyperons production in Au+Au collisions at $\sqrt{s_{\rm NN}}=3$ GeV. For the collision in 0-10% centrality, we study the transverse momentum spectra and rapidity dependent mean transverse momentum for protons. For the collision in 10-40% centrality, we study the directed and elliptic flows for protons and $K^+$ mesons. The results show that the momentum-dependent nuclear mean field with an incompressibility $K_0=230$ MeV can fit fairly the STAR experimental data, while the momentum-independent nuclear mean field with both $K_0=230$ MeV and $K_0=380$ MeV can only partially describe the experimental results. In addition, we also study the directed and elliptic flows for the associated $Λ$, observations reveal the same conclusions as for kaons. These findings indicate that the momentum dependence of nuclear mean field plays a significant role in understanding nuclear matter properties in heavy-ion collisions at $\sqrt{s_{\rm NN}}=3$ GeV. |
| title | Proton and kaon production in Au+Au collisions at $\sqrt{s_{\rm NN}}=3$ GeV |
| topic | Nuclear Theory Nuclear Experiment |
| url | https://arxiv.org/abs/2604.27678 |