arXiv 0810.13112008-10-07hep-lat

具有畴壁费米子的QCD热力学

QCD Thermodynamics with Domain Wall Fermions

Michael Cheng

备注：: 7 pages, 6 figures. Talk presented at the XXVI International Symposium on Lattice Field Theory, July 14-19, 2008, Williamsburg, Virginia, US
发表信息：: PoS LATTICE2008:180,2008

摘要：

本文介绍了我们最近用畴壁费米子研究QCD的赝临界温度$T_c$.畴壁费米子的优点是在$L_s \to \infty$的限制下，它们在有限的晶格间距下保持精确的SU（2）手征对称性。RBC协作组在$L_s = 32$和$N_t = 8$上进行了一系列动力学计算，使用了两个轻夸克（$m_l a = 0.003$）和一个奇夸克（$m_s a = 0.037$）的岩崎规范作用量。在光手性极化率和威尔逊线中可以看到交叉跃迁的清晰信号。然而，在$L_s = 32$，残余的手征对称性破缺尚未完全受控。我们还提出了初步的结果，从HotQCD合作$N_t = 8$和$L_s = 96$，其中剩余的手征对称性破缺的影响相比，$L_s = 32$减少。

英文摘要：

We present our recent studies of the pseudo-critical temperature, $T_c$, of QCD using domain wall fermions. Domain wall fermions have the advantage that they preserve exact SU(2) chiral symmetry at finite lattice spacing in the limit that $L_s \to \infty$. The RBC Collaboration has performed a set of dynamical calculations at $L_s = 32$ and $N_t = 8$ using the Iwasaki gauge action with two light quarks ($m_l a = 0.003$) and one strange quark ($m_s a = 0.037$). A clear signal for the crossover transition can be seen in the light chiral susceptibility, as well as in the Wilson line. However, at $L_s = 32$, the residual chiral symmetry breaking is not yet fully under control. We also present preliminary results from the HotQCD Collaboration with $N_t = 8$ and $L_s = 96$, where the effects of the residual chiral symmetry breaking are reduced compared to $L_s = 32$.

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摘要：

英文摘要：

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