论文标题
等层和等异分型 - 标准介子混合对中子恒星结构的影响
Effects of isoscalar- and isovector-scalar meson mixing on neutron star structure
论文作者
论文摘要
根据FSUGOLD的准确校准的交互，我们表明，在相对论平均值（RMF）模型中，包括ISOVECTOR标量$Δ$ MESON及其与Isoscalar标量$σ$ Meson的耦合可以软化对称能量$ e _ {\ rm rm {sym}}（\ rm {sym}}（\ rm {sym}}） $ e _ {\ rm {sym}}（n）$在高密度下。 We find this new RMF model can be simultaneously compatible with (1) the constraints on the equation of state of symmetric nuclear matter at suprasaturation densities from flow data in heavy-ion collisions, (2) the neutron skin thickness of $^{208}$Pb from the PREX-II experiment, (3) the largest mass of neutron star (NS) reported so far from PSR J0740+6620, （4）$λ_{1.4} \ leq580 $的极限，用于无量纲的潮汐可变形性1.4 $ m _ {\ odot} $ ns从引力波信号GW170817中，（5）通过psr j0030+0451和psr j0451和psr J0740+6620的mass-radius相关性。在常规RMF模型中观察到的Prex-II和GW170817之间。
Based on the accurately calibrated interaction FSUGold, we show that including isovector scalar $δ$ meson and its coupling to isoscalar scalar $σ$ meson in the relativistic mean field (RMF) model can soften the symmetry energy $E_{\rm{sym}}(n)$ at intermediate densities while stiffen the $E_{\rm{sym}}(n)$ at high densities. We find this new RMF model can be simultaneously compatible with (1) the constraints on the equation of state of symmetric nuclear matter at suprasaturation densities from flow data in heavy-ion collisions, (2) the neutron skin thickness of $^{208}$Pb from the PREX-II experiment, (3) the largest mass of neutron star (NS) reported so far from PSR J0740+6620, (4) the limit of $Λ_{1.4}\leq580$ for the dimensionless tidal deformability of the canonical 1.4$M_{\odot}$ NS from the gravitational wave signal GW170817, (5) the mass-radius relation of PSR J0030+0451 and PSR J0740+6620 measured by NICER, and thus remove the tension between PREX-II and GW170817 observed in the conventional RMF model.
