Abstract
The system size dependence of baryon-strangeness (BS) correlations ($C_{BS}$) are investigated with a multiphase transport (AMPT) model for various collision systems from $\mathrm{^{10}B+^{10}B}$, $\mathrm{^{12}C+^{12}C}$, $\mathrm{^{16}O+^{16}O}$, $\mathrm{^{20}Ne+^{20}Ne}$, $\mathrm{^{40}Ca+^{40}Ca}$, $\mathrm{^{96}Zr+^{96}Zr}$, and $\mathrm{^{197}Au+^{197}Au}$ at RHIC energies $\sqrt{s_{NN}}$ of 200, 39, 27, 20, and 7.7 GeV. Both effects of hadron rescattering and a combination of different hadrons play a leading role for baryon-strangeness correlations. When the kinetic window is limited to absolute rapidity $|y|>3$, these correlations tend to be constant after the final-state interaction whatever kind of hadrons subset we chose based on the AMPT framework. The correlation is found to smoothly increase with baryon chemical potential $\mu_B$, corresponding to the collision system or energy from the quark-gluon-plasma-like phase to the hadron-gas-like phase. Besides, the influence of initial nuclear geometrical structures of $\alpha$-clustered nuclear collision systems of $\mathrm{^{12}C+^{12}C}$ as well as $\mathrm{^{16}O+^{16}O}$ collisions is discussed but the effect is found negligible. The current model studies provide baselines for searching for the signals of Quantum Chromodynamics (QCD) phase transition and critical point in heavy-ion collisions through the BS correlation.
Highlights
Relativistic heavy-ion collisions create nuclear matter with sufficient energy density that one expects a quark-gluon plasma (QGP) to form [1,2,3,4]
Experimental analysis of event-by-event fluctuations of net conserved charges like baryon number (B), electric charge (Q), and strangeness (S), in particular, their higher-order cumulants were reported at Relativistic Heavy Ion Collider (RHIC) [15,16] and the Large Hadron Collider (LHC) [17,18]
We focus on the hadron combination case for calculating correlations, and present case I results for comparing effects from different hadron combinations
Summary
Relativistic heavy-ion collisions create nuclear matter with sufficient energy density that one expects a quark-gluon plasma (QGP) to form [1,2,3,4]. Experimental analysis of event-by-event fluctuations of net conserved charges like baryon number (B), electric charge (Q), and strangeness (S), in particular, their higher-order cumulants were reported at RHIC [15,16] and the Large Hadron Collider (LHC) [17,18]. 16×104 10×104 10×104 2×104 1×104 3×104 3×104 baryon-strangeness correlation which is related to the QGP phase transition may be sensitive to the fluctuations from small systems to large systems through heavy-ion collisions. We adopt a multiphase transport model to study the influence of collision system size on baryonstrangeness correlation CBS.
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call