arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1206.5191hep-phhep-latnucl-th
收藏

Nf=2和Nf=2+1 QCD的相变子和相结构

Propagators and phase structure of Nf=2 and Nf=2+1 QCD

Christian S. Fischer, Jan Luecker

摘要:

通过求解夸克和胶子传播子的耦合截断Dyson-Schwinger方程组,研究了有限温度和化学势下QCD的相结构。与以前的计算不同,我们考虑了夸克对杨-米尔斯扇形的完全反作用,并包括了奇异夸克的影响。我们讨论了由此产生的非猝灭胶子传播子的热质量和提取序参量的手征和解除禁闭的夸克过渡。零化学势下夸克凝聚的温度依赖性的结果与相应的格点计算符合得很好。我们确定了有限化学势下的相图,并在(mu_q,T)=(190,100)MeV处找到了一个潜在的临界端点。

英文摘要:

We investigate the phase structure of QCD at finite temperature and chemical potential by solving a coupled set of truncated Dyson-Schwinger equations for the quark and gluon propagator. In contrast to previous calculations we take into account the full back-reaction of the quarks onto the Yang-Mills sector and we include the effects of strange quarks. We discuss the resulting thermal mass of the unquenched gluon propagator and extract order parameters for the chiral and deconfinement transition from the quarks. Our result for the temperature dependence of the quark condensate at zero chemical potential agrees well with corresponding lattice calculations. We determine the phase diagram at finite chemical potential and find a potential critical endpoint at (mu_q,T) = (190,100) MeV.

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。

↑