剪切粘度对中子星中反K介子condensed matter成核的影响
Effect of Shear viscosity on the nucleation of antikaon condensed matter in neutron stars
摘要：
研究了质子中子星冷却阶段强子物质到反K介子凝聚物质的一级相变。相变通过反K介子凝聚态的热成核进行。在这方面，我们研究了剪切粘度对反K介子凝聚态液滴热成核速率的影响。在这里，我们采用相同的状态方程计算剪切粘度和热成核时间。利用相对论平均场模型计算了由中子、质子、电子和μ子组成的中子星物质的剪切粘性。成核速率中的前因子包括剪切粘度，与早期计算的$T^4$近似相比提高了几个数量级。因此，在$T^4$近似的热成核时间高估了我们的结果。此外，反K介子液滴的热成核可能在我们的情况下，表面张力小于20 MeV fm $^{-2}$。
英文摘要：
We investigate a first-order phase transition from hadronic matter to antikaon condensed matter during the cooling stage of protoneutron stars. The phase transition proceeds through the thermal nucleation of antikaon condensed matter. In this connection we study the effect of shear viscosity on the thermal nucleation rate of droplets of antikaon condensed matter. Here we adopt the same equation of state for the calculation of shear viscosity and thermal nucleation time. We compute the shear viscosity of neutron star matter composed of neutrons, protons, electrons and muons using the relativistic mean field model. The prefactor in the nucleation rate which includes the shear viscosity, is enhanced by several orders of magnitude compared with the $T^4$ approximation of earlier calculations. Consequently the thermal nucleation time in the $T^4$ approximation overestimates our result. Further the thermal nucleation of an antikaon droplet might be possible in our case for surface tension smaller than 20 MeV fm$^{-2}$.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
