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arXiv 1002.1793astro-ph.COastro-ph.HEnucl-th
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天体物理学与宇宙学中的奇异现象

Strangeness in Astrophysics and Cosmology

Tillmann Boeckel, Matthias Hempel, Irina Sagert, Giuseppe Pagliara, Basil Sa'd, Jurgen Schaffner-Bielich

摘要:

讨论了奇异夸克物质在天体物理系统中的作用和早期宇宙中QCD相变的一些最新进展。软核物质状态方程的因果关系约束提取的阈下K介子的生产在重离子碰撞被用来推导致密星的质量上限。本文概述了奇异夸克物质的粘滞性与旋转动力夸克的引力波辐射之间的相互作用。通过对两颗奇异星并合的详细数值研究,透视了宇宙射线中奇异夸克物质块的通量。最后,我们讨论了早期宇宙中QCD相变的一个新的方案,它允许一个小的暴胀时期,由于一个明显的一级相变在大的重荷化学势。

英文摘要:

Some recent developments concerning the role of strange quark matter for astrophysical systems and the QCD phase transition in the early universe are addressed. Causality constraints of the soft nuclear equation of state as extracted from subthreshold kaon production in heavy-ion collisions are used to derive an upper mass limit for compact stars. The interplay between the viscosity of strange quark matter and the gravitational wave emission from rotation-powered pulsars are outlined. The flux of strange quark matter nuggets in cosmic rays is put in perspective with a detailed numerical investigation of the merger of two strange stars. Finally, we discuss a novel scenario for the QCD phase transition in the early universe, which allows for a small inflationary period due to a pronounced first order phase transition at large baryochemical potential.

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。

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