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arXiv 1111.3391hep-lathep-phhep-th
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phase diagrams在QCD和类QCD理论中的普适性

Universality of phase diagrams in QCD and QCD-like theories

Masanori Hanada, Naoki Yamamoto

摘要:

我们通过大N_c等价性证明了QCD和类QCD理论中相图的普遍性。有限同位旋化学势下的QCD与有限重子化学势下的SO(2N_c)和Sp(2N_c)规范理论的整个相图是一致的。在手征极限下,它们也与有限手征化学势下的QCD完全相同。在这些理论中的π介子或双夸克凝聚相之外,相图的普适性适用于有限重子化学势下的QCD。我们进一步论证了普适性甚至对N_c=3也近似成立。我们的结果使得在有限重子化学势和高温下用格点无符号理论研究QCD,特别是手征相变成为可能。

英文摘要:

We show the universality of phase diagrams in QCD and QCD-like theories through the large-N_c equivalence. The whole phase diagrams are identical between QCD at finite isospin chemical potential and SO(2N_c) and Sp(2N_c) gauge theories at finite baryon chemical potential. In the chiral limit, they are also identical to that of QCD at finite chiral chemical potential. Outside the pion or diquark condensed phase in these theories, the universality of phase diagrams is applicable to QCD at finite baryon chemical potential. We further argue that the universality may work approximately even for N_c=3. Our result makes it possible to study QCD at finite baryon chemical potential and high temperature, especially the chiral phase transition, using sign-free theories on the lattice.

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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