标题： 有限温度T和μ_B条件下强子到夸克物质的相变 显示英文标题

标题： Phase transitions of hadronic to quark matter at finite T and μ_B

摘要： 手征物质到夸克物质的相变以及混合的手征-夸克共存相的边界在双状态方程（EoS）模型中进行了研究。 使用带有恒定和密度依赖介子-核耦合的相对论有效平均场方法来描述手征物质，并采用MIT袋模型来描述夸克物质。 通过求解Gibbs方程得到了不同袋常数的混合相边界。 我们注意到，在零化学势的情况下，临界温度对袋参数的依赖可以通过费米子超相对论夸克气体模型很好地再现，而没有来自手征部分的贡献。 相反，临界化学势（在零温度下）对手征部分的状态方程非常敏感。 因此，对于有限的重子密度和低温度下的夸克-胶子等离子体转变，研究手征状态方程更为相关。 此外，在低温和有限化学势区域，对于较小的袋常数值（B < (135 MeV)^4），Gibbs条件没有解存在。 在非对称物质中的同位旋效应在较低温度下的高化学势区域显得尤为重要，这对手星内部核心的性质以及中间能量下的重离子碰撞感兴趣。 显示英文摘要

摘要： The phase transition of hadronic to quark matter and the boundaries of the mixed hadron-quark coexistence phase are studied within the two Equation of State (EoS) model. The relativistic effective mean field approach with constant and density dependent meson-nucleon couplings is used to describe hadronic matter, and the MIT Bag model is adopted to describe quark matter. The boundaries of the mixed phase for different Bag constants are obtained solving the Gibbs equations. We notice that the dependence on the Bag parameter of the critical temperatures (at zero chemical potential) can be well reproduced by a fermion ultrarelativistic quark gas model, without contribution from the hadron part. At variance the critical chemical potentials (at zero temperature) are very sensitive to the EoS of the hadron sector. Hence the study of the hadronic EoS is much more relevant for the determination of the transition to the quark-gluon-plasma at finite baryon density and low-T. Moreover in the low temperature and finite chemical potential region no solutions of the Gibbs conditions are existing for small Bag constant values, B < (135 MeV)^4. Isospin effects in asymmetric matter appear relevant in the high chemical potential regions at lower temperatures, of interest for the inner core properties of neutron stars and for heavy ion collisions at intermediate energies.