Title: Repulsive Vector Interaction in Three Flavor Magnetized Quark and Stellar Matter Show Chinese title

Title: 三种味道磁化夸克和天体物质中的排斥矢量相互作用

Abstract: The effect of the vector interaction on three flavor magnetized matter is studied within the SU(3) Nambu--Jona-Lasiono quark model. We have considered cold matter under a static external magnetic field within two different models for the vector interaction in order to investigate how the form of the vector interaction and the intensity of the magnetic field affect the equation of state as well as the strangeness content. It was shown that the flavor independent vector interaction predicts a smaller strangeness content and, therefore, harder equations of state. On the other hand, the flavor dependent vector interaction favors larger strangeness content the larger the vector coupling. We have confirmed that at low densities the magnetic field and the vector interaction have opposite competing effects: the first one softens the equation of state while the second hardens it. Quark stars and hybrid stars subject to an external magnetic field were also studied. Larger star masses are obtained for the flavor independent vector interaction. Hybrid stars may bare a core containing deconfined quarks if neither the vector interaction nor the magnetic field are too strong. Also, the presence of strong magnetic fields seems to disfavor the existence of a quark core in hybrid stars. Show Chinese abstract

Abstract: 向量相互作用对三种味磁化物质的影响在SU(3) Nambu--Jona-Lasiono夸克模型中进行了研究。 我们考虑了在静态外部磁场下的冷物质，并采用了两种不同的向量相互作用模型，以研究向量相互作用的形式和磁场强度如何影响状态方程以及奇异数含量。 结果表明，与味无关的向量相互作用预测了较小的奇异数含量，因此状态方程更硬。 另一方面，与味相关的向量相互作用倾向于更大的奇异数含量，且向量耦合越大，效果越明显。 我们确认，在低密度下，磁场和向量相互作用具有相反的竞争效应：前者使状态方程变软，而后者使其变硬。 还研究了受外部磁场影响的夸克星和混合星。 对于与味无关的向量相互作用，可以获得更大的恒星质量。 如果向量相互作用和磁场都不太强，混合星可能拥有包含禁闭夸克的核心。 此外，强磁场的存在似乎不利于混合星中夸克核心的存在。