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arXiv 0709.2235hep-ph
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强耦合夸克物质中的束缚双夸克及其玻色-爱因斯坦凝聚

Bound diquarks and their Bose-Einstein condensation in strongly coupled quark matter

Masakiyo Kitazawa, Dirk H. Rischke, Igor A. Shovkovy

摘要:

在非零温度T和夸克化学势μ的三味夸克物质相图中,研究了双夸克分子的形成及其玻色-爱因斯坦凝聚(BEC)。使用夸克模型与四费米子相互作用,我们确定可能的双夸克激发的微观计算的双夸克传播子的极点。夸克质量是通过求解手征凝聚体的动力学方程得到的,并被发现确定双夸克激发的稳定性。在T-mu平面上研究了不同双夸克耦合强度下双夸克激发的稳定性。我们发现,束缚双夸克分子出现在小夸克化学势在中间耦合和非奇异双夸克分子的BEC发生,如果夸克之间的吸引力足够强。

英文摘要:

We explore the formation of diquark molecules and their Bose-Einstein condensation (BEC) in the phase diagram of three-flavor quark matter at nonzero temperature, T, and quark chemical potential, mu. Using a quark model with a four-fermion interaction, we identify possible diquark excitations as poles of the microscopically computed diquark propagator. The quark masses are obtained by solving a dynamical equation for the chiral condensate and are found to determine the stability of the diquark excitations. The stability of diquark excitations is investigated in the T-mu plane for different values of the diquark coupling strength. We find that bound diquark molecules appear at small quark chemical potentials at intermediate coupling and that BEC of non-strange diquark molecules occurs if the attractive interaction between quarks is sufficiently strong.

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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