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arXiv 2008.05978hep-phnucl-th
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稠密相对论系统的重整化群研究

Renormalization Group Studies of Dense Relativistic Systems

Jens Braun, Timon Dörnfeld, Benedikt Schallmo, Sebastian Töpfel

摘要:

几十年来,相对论性物质吸引了大量的关注,重点是对致密强相互作用物质的相结构和热力学的理解。密集的强相互作用物质的分析是复杂的,因为系统预计将经历从低密度下由自发手征对称性破缺支配的区域到中密度和高密度下由库珀不稳定性支配的区域的过渡。重整化群(RG)方法在一般的致密物质研究中已经并仍然发挥着重要的作用。在目前的工作中,我们研究RG流的密集相对论系统中存在的库珀不稳定性和分析的银火焰属性的作用。特别是,我们批判性地评估如何应用衍生扩展研究致密物质系统的系统方式。这也涉及到正则化方案的详细讨论。这些正式的发展的指导下,我们引入了一类新的调节功能的功能RG的研究,这是适合于处理库珀不稳定性的存在下,相对论理论。最后,我们通过一个简单的夸克双夸克模型的帮助下,证明其应用。

英文摘要:

Dense relativistic matter has attracted a lot of attention over many decades now, with a focus on an understanding of the phase structure and thermodynamics of dense strong-interaction matter. The analysis of dense strong-interaction matter is complicated by the fact that the system is expected to undergo a transition from a regime governed by spontaneous chiral symmetry breaking at low densities to a regime governed by the presence of a Cooper instability at intermediate and high densities. Renormalization group (RG) approaches have played and still play a prominent role in studies of dense matter in general. In the present work, we study RG flows of dense relativistic systems in the presence of a Cooper instability and analyze the role of the Silver-Blaze property. In particular, we critically assess how to apply the derivative expansion to study dense-matter systems in a systematic fashion. This also involves a detailed discussion of regularization schemes. Guided by these formal developments, we introduce a new class of regulator functions for functional RG studies which is suitable to deal with the presence of a Cooper instability in relativistic theories. We close by demonstrating its application with the aid of a simple quark-diquark model.

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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