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首页> 外文期刊>Nuclear Physics, A: Journal Devoted to the Experimental Study of the Fundamental Constituents of Matter and Their Actions >How robust is a 2SC quark matter phase under compact star constraints?
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How robust is a 2SC quark matter phase under compact star constraints?

机译：在紧凑恒星约束下2SC夸克物质相的鲁棒性如何？

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摘要

We study the phase structure and equation of state for two-flavor quark matter at low temperature under compact star constraints within a nonlocal chiral quark model. We find that the occurrence of a two-flavor color superconducting (2SC) phase is sensitive to variations of both the formfactor of the interaction and the ratio eta between the coupling constants in the diquark and the scalar meson channels. Our study suggests that for standard values of the coupling ratio 0.5 < eta < 0.75 either the 2SC phase does not occur (Gaussian formfactor) or it exists only in a mixed phase with normal quark matter with a volume fraction less than 10-30%, occurring at high baryon chemical potentials mu(B) > 1200 MeV and most likely not relevant for compact stars. We also present the relevant region of the phase diagram for compact star applications and obtain that no gapless 2SC phase occurs at low temperatures. (c) 2005 Elsevier B.V All rights reserved.
机译：我们研究了在非局部手性夸克模型中，在紧凑恒星约束下，低温下的两味夸克物质的相结构和状态方程。我们发现，两种口味的彩色超导（2SC）相的出现对相互作用的形状因数以及diquark和标量介子通道中耦合常数之比eta的变化都敏感。我们的研究表明，对于耦合比0.5 1200 MeV且最可能与紧凑恒星无关的情况下。我们还介绍了紧凑型恒星应用的相图相关区域，并获得了在低温下不会出现无间隙2SC相的信息。 （c）2005 Elsevier B.V保留所有权利。

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