| Issue |
EPJ Web Conf.
Volume 296, 2024
30th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions (Quark Matter 2023)
|
|
|---|---|---|
| Article Number | 14009 | |
| Number of page(s) | 4 | |
| Section | QCD at Finite T and Density | |
| DOI | https://doi.org/10.1051/epjconf/202429614009 | |
| Published online | 26 June 2024 | |
https://doi.org/10.1051/epjconf/202429614009
Particle production in Au+Au collisions at beam energy scan II energies at STAR
University of California, Davis
Published online: 26 June 2024
We report on measurements of light charged hadron production in Au+Au collisions at √SNN = 14.6, 19.6, 27, and 54.4 GeV from the second phase of the beam energy scan (BES-II) program at RHIC. Transverse mass spectra and rapidity density distributions of π±, K±, p, and ¯p are measured as a function of collision energy, centrality, and rapidity. This work extends the previously published BES-I mid-rapidity (|y| < 0.1) measurement to a rapidity of 0.9. This new rapidity dependence highlights the effects of baryon stopping for proton yields and the different production mechanisms of π± and K±. The relative abundance of these light hadrons indicates different thermodynamic environments at different energies, centralities, and rapidities. The temperature (T) and chemical potentials (μB and μS) at chemical freeze-out are reported with their dependence on rapidity to further understand the QCD phase diagram.
© The Authors, published by EDP Sciences, 2024
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