Speaker
Description
Two-particle correlation analyses are often used to study the spatial and temporal extents of the particle-emitting source in high-energy nuclear collisions. Information on the final state interactions amongst the particles under study can also be extracted from the measurement. For example, from the p-$\Lambda$ and p-$\Xi^-$ correlation functions, one could study the hyperon-nucleon (Y-N) interactions in such collisions. It is particularly interesting to study the dependence on the collision energy of the source size at the moment of freeze-out. The STAR fixed-target program from $\sqrt{s_{\rm NN}}=3.0$ to 7.7 GeV has enabled us to investigate the high baryon density region from $\mu_{\rm B}$ = 420 to 750 MeV.
In this poster, the first measurements of p-$\Lambda$ and p-$\Xi^-$ correlation functions in Au + Au collisions at $\sqrt{s_{\rm NN}}=3.2$, 3.5, and 3.9 GeV with the fixed-target mode from STAR will be presented. The results will be compared with the data from $\sqrt{s_{\rm NN}}=3$ GeV Au + Au collisions ($\mu_{\rm B}$ = 750 MeV) and the data from higher energies [1, 2], where $\mu_{\rm B}$ is close to 0, along with model calculations generated via the UrQMD hadronic transport model and CRAB afterburner.
References
[1] STAR, Phys. Rev. C 74, 064001 (2006)
[2] ALICE, Nature 588, 232–238 (2020)
| Category | Experiment |
|---|---|
| Collaboration (if applicable) | RHIC STAR |
