arXiv 1704.044332017-04-14nucl-thastro-ph.HEhep-ph

中子星并合的唯象QCD状态方程

Phenomenological QCD equations of state for neutron star mergers

Toru Kojo

备注：: 5 pages, 2 figures; prepared for quark matter 2017, Chicago, Illinois, USA
DOI：: 10.1016/j.nuclphysa.2017.06.034

摘要：

重子密度下的热QCD状态方程对相结构和由此产生的激发模很敏感。低温下的主要贡献可以是~p_F^2 T^2（pF：费米动量，T：温度）（对于无带隙夸克的相位）或~T^4（对于带隙夸克的相位）。在后者的热压力是由集体模式为主。从一个为中子星结构发展的示意性夸克模型出发，通过将它们建立在色味锁夸克物质的平均场背景上，我们估算了Nambu-Goldstone模的热贡献和零点能量.应用热力学势的相移表示，我们不仅包括束缚态对，而且还包括共振态对。根据Levinson定理，高能量贡献倾向于抵消热力学的极点贡献，在零点能处缓和UV行为。我们在这次演讲中的主要目标是重子密度nB大到~ 5-10n_0（n_0 = 0.16 fm^{-3}：核饱和密度），温度T为~30-100 MeV的区域。通过对中子星并合事件引力波的探测，可以对这一领域有更深的认识。

英文摘要：

Thermal QCD equations of state at high baryon density are sensitive to the phase structure and the resulting excitation modes. The leading contribution at low temperature can be either ~p_F^2 T^2 (pF: Fermi momentum, T: temperature) for phases with gapless quarks, or ~T^4 for phases with gapped quarks. In the latter the thermal pressure is dominated by collective modes. Starting with a schematic quark model developed for neutron star structure, we estimate the thermal contributions and zero point energy from the Nambu-Goldstone modes by building them upon the mean field background for the color-flavor-locked quark matter. Applying the phase shift representation for thermodynamic potentials, we include not only the bound state pairs but also resonating pairs. According to the Levinson's theorem, the high energy contributions tend to cancel the pole contributions to the thermodynamics, tempering the UV behaviors in the zero point energy. Our primary target in this talk is the domain with baryon density nB as large as ~ 5-10n_0 (n_0 = 0.16 fm^{-3}: nuclear saturation density), and the temperature T of the order ~30-100 MeV. The insights into this domain may be obtained through the future detection of gravitational waves from neutron star merging events.

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。

摘要：

英文摘要：

相关论文