Isoscalar-vector interaction and its influence on the hadron-quark phase transition  

作　　者：SHAO Guoyun COLONNA Maria DI TORO Massimo LIU Yuxin LIU Bo 

机构地区：[1]Department of Applied Physics,Xi'an Jiao Tong University [2]INFN-Laboratori Nazionali del Sud,Via S. Sofia 62 [3]Department of Physics and Astronomy,University of Catania,Via S.Sofia 64 [4]Department of Physics and State Key Laboratory of Nuclear Physics and Technology,Peking University [5]Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator [6]Institute of High Energy Physics,Chinese Academy of Sciences [7]Theoretical Physics Center for Scientific Facilities,Chinese Academy of Sciences

出　　处：《Nuclear Science and Techniques》2013年第5期122-126,共5页核技术（英文）

基　　金：Supported by National Natural Science Foundation of China(NSFC) projects (Nos.11147144 and 11305121)

摘　　要：The hadron-quark phase transition is studied with the newly constructed Hadron-Poyakov-Nambu- Jona-Lasinio(PNJL) model.Particularly,in the description of quark matter,we include the isoscalar-vector interaction.With the constraints of neutron star observations,our calculation shows the isoscalar-vector interaction between quarks is indispensable if massive hybrids star exist in the universe.Its strength determines the onset density of quark matter,and the mass-radius relations of hybrid stars.Also,as a connection with heavy-ion-collision experiments,we discuss the strength of isoscalar-vector interaction and its effect on the signals of hadron-quark phase transition in heavy-ion collisions,such as NICA at JINR-Dubna and FAIR at GSI-Darmstadt.The hadron-quark phase transition is studied with the newly constructed Hadron-Poyakov-Nambu- Jona-Lasinio （PNJL） model. Particularly, in the description of quark matter, we include the isoscalar-vector interaction. With the constraints of neutron star observations, our calculation shows the isoscalar-vector interaction between quarks is indispensable if massive hybrids star exist in the universe. Its strength determines the onset density of quark matter, and the mass-radius relations of hybrid stars. Also, as a connection with heavy-ion-collision experiments, we discuss the strength of isoscalar-vector interaction and its effect on the signals of hadron-quark phase transition in heavy-ion collisions, such as NICA at JINR-Dubna and FAIR at GSI-Darmstadt.

关 键 词：同位旋矢量 夸克物质 相互作用 强子 相变 重离子碰撞实验 中子星 计算表 

分 类 号：O572.33[理学—粒子物理与原子核物理]