论文标题
在相对论重离子碰撞中测试中子星内中子恒星内的相变参数
Testing the phase transition parameters inside neutron stars with the production of protons and lambdas in relativistic heavy-ion collisions
论文作者
论文摘要
我们证明了在β稳定的中子恒星物质以及重型离子碰撞（HICS）中形成的几乎对称的核物质中，夸克解粉相变的一致性。我们使用多相传输模型的纯制力体级联反应，在3和4.5 GEV/NOCLEON入射束能量中调查了Au+Au碰撞中的质子和$λ$。基于HADRONIC相的Quark平均场模型和高密度Quark阶段的恒定速度参数化，根据Quark平均模型的一类状态杂种方程来描述HIC和中子星中的相变。恒星协作以3 GEV/核的各向异性质子流量的测量值相对较低，相对较低的相变密度低于$ \ sim 2.5 $ 2.5 $乘以的饱和密度，这是由中子星的重力波和电磁观察结果指示的。 4.5 GEV/核子的较高能量的质子流数据可用于有效约束状态的高密度夸克物质方程的柔软度。最后，与质子流相比，发现$λ$流量不太敏感，并且不限制对状态方程。
We demonstrate the consistency of the quark deconfinement phase transition parameters in the beta-stable neutron star matter and in the nearly symmetric nuclear matter formed in heavy-ion collisions (HICs). We investigate the proton and $Λ$ flow in Au+Au collisions at 3 and 4.5 GeV/nucleon incident beam energies with the pure hadron cascade version of a multi-phase transport model. The phase transition in HICs and neutron stars is described based on a class of hybrid equations of state from the quark mean-field model for the hadronic phase and a constant-speed-of-sound parametrization for the high-density quark phase. The measurements of the anisotropic proton flow at 3 GeV/nucleon by the STAR collaboration favor a relatively low phase transition density lower than $\sim 2.5$ times saturation density indicated by the gravitational wave and electromagnetic observations of neutron stars. And the proton flow data at the higher energy of 4.5 GeV/nucleon can be used to effectively constrain the softness of high-density quark matter equations of state. Finally, compared to the proton flow, the $Λ$ flow is found to be less sensitive and not constraining to the equations of state.
