论文标题
用$ξ^{ - }/ξ^{0} $比率探测高密度的核对称能
Probing high-density nuclear symmetry energy with $Ξ^{-}/Ξ^{0}$ ratio in heavy-ion collisions at $\sqrt{s_{NN}} \sim 3$ GeV
论文作者
论文摘要
恒星协作（PLB {\ bf 827}，137003（2022）和prl {\ bf 128}，202303（2022））在RHIC进行的最新光束能量扫描（BES）实验，发现HADRONIC相互作用占据了集体互动的主导和Proton累积比率由Baryon Novering predon the Baryon Novering prienc. $ \ sqrt {s_ {nn}} $ = 3 gev au+au反应，表明在这种碰撞中形成的密集介质很可能是耐药的。在具有动量依赖性的等速膜和异卵形的单核平均场电位的更新的艺术（一种相对论传输）中，与超饱和密度的不同对称能相对应，$ n/p $，$ n/p $，$ n/p $，$π^{ - }/ph { - }/π^{+} $σ^{ - }/σ^{+} $和$ξ^{ - }/ξ^{0} $比率在中央Au+au碰撞中进行了$ \ sqrt {s_ {nn}} $ = 3 GEV，最大中央密度达到$（3.6 \ sim 4.0 $ sim 4.0 $ $）。发现双重奇怪的$ξ^{ - }/ξ^{0} $比率对高密度核对称能的变化具有最强的敏感性。因此，在$ \ sqrt {s_ {s_ {nn}} \ sim 3 $ GEV中，相对论重型离子反应中的$ξ^{ - }/ξ^{0} $比率可能有助于探究众所周知的对称能量，这些对称能量对了解各种属性的多种物质具有重要的中子含量为重要的中子。
Recent beam energy scan (BES) experiments at RHIC by the STAR Collaboration (PLB {\bf 827},137003 (2022) and PRL {\bf 128}, 202303 (2022)) found that hadronic interactions dominate the collective flow and the proton cumulant ratios are driven by baryon number conservation in a region of high baryon density in $\sqrt{s_{NN}}$ = 3 GeV Au+Au reactions, indicating the dense medium formed in such collisions is likely hadronic matter. Within an updated ART (A Relativistic Transport) model with momentum dependent isoscalar and isovector single-nucleon mean-field potentials corresponding to different symmetry energies at suprasaturation densities, the $n/p$, $π^{-}/π^{+}$, $K_{s}^{0}/K^{+}$, $Σ^{-}/Σ^{+}$ and $Ξ^{-}/Ξ^{0}$ ratios are studied for central Au+Au collisions at $\sqrt{s_{NN}}$ = 3 GeV where the maximum central density reaches about $(3.6\sim 4.0)ρ_0$. The doubly strange $Ξ^{-}/Ξ^{0}$ ratio is found to have the strongest sensitivity to the variation of high-density nuclear symmetry energy. Thus, the $Ξ^{-}/Ξ^{0}$ ratio in relativistic heavy-ion reactions at $\sqrt{s_{NN}} \sim 3$ GeV may help probe sensitively the poorly known symmetry energy of dense neutron-rich matter critically important for understanding various properties of neutron stars.
