论文标题
紧凑型星星中的QCD颜色超导率：重力波信号的颜色味锁定夸克星候选人GW190814
QCD color superconductivity in compact stars: color-flavor locked quark star candidate for the gravitational-wave signal GW190814
论文作者
论文摘要
在足够高的密度和低温下，预计将表现为形成库珀对的夸克气体，即形成库珀对的夸克气体，即颜色超导体，正如Alford，Rajagopal和Wilczek [核物理学B 537，443（1999）]最初建议的那样。基态是一种超流体，是一种破坏手性对称性的电磁绝缘子，称为颜色味锁定相。如果在紧凑型恒星的核心中发生这样的相，则最大质量可能会超过辐射物质的质量。重力波信号GW190814涉及一个紧凑的对象，质量为$ 2.6 {\ rm m} _ \ odot $，在所谓的低质量间隙中。由于它太重了，无法成为中子恒星，而且太轻而无法成为黑洞，因此尚未确定其性质。在这里，我们不仅表明具有该质量的颜色味锁定的夸克之星是可行的，而且还计算了模型参数的范围，即超导差距$δ$和袋子常数$ b $，可以满足状态方程的严格限制。我们发现，如果$δ\ geq 200 {\ rm mev} $和$ b \ geq 83 {\ rmmev}/domentd for，$ 2.6 {\ rm m} _ \ odot $如果$δ\ geq 200 {\ rm mev} $和$ b \ geq 83 {\ rmMev}/drestance forndy，则满足状态方程的观察约束。 $ m_s = 95〜 {\ rm mev}/c^2 $，并达到半径$（12.7-13.6）{\ rm km} $和中央密度$（7.5-9.8）10^{14} {\ rm g}/{\ rm g}/{\ rm cm cm cm}^3 $。
At sufficiently high densities and low temperatures matter is expected to behave as a degenerate Fermi gas of quarks forming Cooper pairs, namely a color superconductor, as was originally suggested by Alford, Rajagopal and Wilczek [Nuclear Physics B 537, 443 (1999)]. The ground state is a superfluid, an electromagnetic insulator that breaks chiral symmetry, called the color-flavor locked phase. If such a phase occurs in the cores of compact stars, the maximum mass may exceed that of hadronic matter. The gravitational-wave signal GW190814 involves a compact object with mass $2.6{\rm M}_\odot$, within the so-called low mass gap. Since it is too heavy to be a neutron star and too light to be a black hole, its nature has not been identified with certainty yet. Here, we show not only that a color-flavor locked quark star with this mass is viable, but also we calculate the range of the model-parameters, namely the superconducting gap $Δ$ and the bag constant $B$, that satisfies the strict LIGO constraints on the equation of state. We find that a color-flavor locked quark star with mass $2.6{\rm M}_\odot$ satisfies the observational constraints on the equation of state if $Δ\geq 200{\rm MeV}$ and $B\geq 83{ \rm MeV}/{\rm fm^3}$ for a strange quark mass $m_s=95~{\rm MeV}/c^2$, and attains a radius $(12.7-13.6) {\rm km}$ and central density $(7.5-9.8) 10^{14}{\rm g}/{\rm cm}^3$.
