论文标题
互动$ ud $和$ uds $ quark Matter在有限密度和夸克之星上
Interacting $ud$ and $uds$ quark matter at finite densities and quark stars
论文作者
论文摘要
在两种味和（2+1）中研究了夸克物质状态的稳定性和方程 - 包括向量相互作用的nambu-jona-lasinio（NJL）模型。使用免费参数$α$，Lagrangian由两个部分（原始的NJL Lagrangian和Fierz的转换）构建，因为$ L =（1-α）L _ {\ rm {njl}}}+αl_ {\ rm {fierz}} $。我们发现，根据与Quark Vector交互和交换交互频道的限制相互作用，$ UD $ nonstrange和$ uds $奇怪的问题都是绝对稳定的。计算出的Quark Star性质可以与PSR J0030+0451和PSR J0740+6620的最近测得的质量和半径以及GW170817的潮汐变形性调和。此外，与奇怪的人（$ \ sim2.1 \，m _ {\ odot} $）相比，NONDRANGE恒星中更强烈的夸克物质允许状态更严格的方程式，因此具有更高的状态方程（$ \ sim2.7 \，m _ {\ odot} $）。与中子恒星物质相比，简要讨论了奇怪和非夸克恒星事物的声音速度。
The stability and equation of state of quark matter are studied within both two-flavor and (2+1)-flavor Nambu-Jona-Lasinio (NJL) models including the vector interactions. With a free parameter $α$, the Lagrangian is constructed by two parts, the original NJL Lagrangian and the Fierz transformation of it, as $L=(1-α) L_{\rm{NJL}}+αL_{\rm{Fierz}}$. We find that there is a possibility for both $ud$ nonstrange and $uds$ strange matter being absolute stable, depending on the interplay of the confinement with quark vector interaction and the exchange interaction channels. The calculated quark star properties can reconcile with the recently measured masses and radii of PSR J0030+0451 and PSR J0740+6620, as well as the tidal deformability of GW170817. Furthermore, the more strongly-interacting quark matter in the nonstrange stars allows a stiffer equation of state and consequently a higher maximum mass ($\sim2.7\, M_{\odot}$) than the strange ones ($\sim2.1\, M_{\odot}$). The sound velocities in strange and nonstrange quark star matter are briefly discussed compared to those of neutron star matter.
