论文标题
Kaon-Meson凝结和$δ$共振在相对论均值模型中
Kaon-meson condensation and $Δ$ resonance in hyperonic stellar matter within a relativistic mean-field model
论文作者
论文摘要
我们研究了相对论均值场模型中致密巴属物质状态的方程，并将$δ$（1232）等异荷斯群包括在具有超子的IUFSU模型中，并考虑了Kaon Meson凝结的可能性。我们发现有必要考虑大型中子恒星内的$δ$共振状态。 KAON MESON和HYPYOS的临界密度转移到了更高的密度区域，在这方面，$δ$共振的早期出现对于确保高光恒星分支的稳定性至关重要，并且耦合参数$ x_ {σΔ} $约束基于核问题中的QCD规则的差异。 $δ$共振在低密度区域中产生一个柔和的状态方程，这使得潮汐变形和半径与GW170817的观察一致。由于增加了新的自由度将导致状态方程的软化，因此$σ$ -CUT方案（$σ$ -CUT方案都可以降低中子星质量的降低，如果人们假设$ {ρ_b} $（$ρ_b> p p p p p phats）的$σ$ -Meson强度有限降低$σ$ -Meson的强度，则与$ {ρ_b>ρ_0相比， 2 $ m _ {\ odot} $。
We study the equation of state of dense baryon matter within the relativistic mean-field model, and we include $Δ$(1232) isobars into IUFSU model with hyperons and consider the possibility of kaon meson condensation. We find that it is necessary to consider the $Δ$ resonance state inside the massive neutron star. The critical density of Kaon mesons and hyperons is shifted to a higher density region, in this respect an early appearance of $Δ$ resonances is crucial to guarantee the stability of the branch of hyperonized star with the difference of the coupling parameter $x_{σΔ}$ constrained based on the QCD rules in nuclear matter. The $Δ$ resonance produces a softer equation of state in the low density region, which makes the tidal deformability and radius consistent with the observation of GW170817. As the addition of new degrees of freedom will lead to a softening of the equation of state, the $σ$-cut scheme, which states the decrease of neutron star mass can be lowered if one assumes a limited decrease of the $σ$-meson strength at ${ρ_B}$($ρ_B > ρ_0$), finally we get a maximum mass neutron star with $Δ$ resonance heavier than 2$M_{\odot}$.
