Speaker
Description
Authors: J. Aichelin, C. Blume, E. Bratkovskaya, G. Coci, S. Gläßel, V. Kireyeu, Y. Leung, V. Voronyuk, I. Vassiliev, M. Winn, Y. Zhou
The equation-of-state (EoS) at high baryon density is crucial for understanding the behavior of nuclear matter under extreme conditions. The directed flow of protons and $\Lambda$ baryons has long been proposed as a sensitive observable for probing the high-density EoS. Recent data from the STAR experiment in Au+Au collisions at 3 GeV, particularly on the transverse momentum, rapidity distributions, and collective flow of light nuclei and hypernuclei, provide a valuable opportunity to further explore properties of high baryon density matter.
We employ the Parton-Hadron-Quantum-Molecular Dynamics (PHQMD) model to investigate the sensitivity of various observables to different equation-of-state scenarios. We consider two static EoS models, labeled "soft" and "hard", which differ in compressibility modulus, as well as a momentum-dependent soft EoS model. In PHQMD, (hyper)nuclei are formed dynamically throughout the entire heavy-ion collision by the potential interaction between nucleons, which is sensitive to the EoS. In this talk, by comparing PHQMD simulations with STAR experimental data on particle spectra and flow at $\sqrt{s_{\rm NN}}$ = 3 GeV, we find that the production of light nuclei and hypernuclei, as well as their collective flow, are sensitive to the choice of the EoS. By analyzing these observables, we can gain valuable information about the underlying nuclear interactions and the properties of dense matter. Our results demonstrate the potential of hypernuclei as powerful probes of the high-density EoS and provide important insights for future experiments like CBM at FAIR.
| Category | Theory |
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