arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0905.3112hep-lat
收藏

N_f=2扭曲质量Wilson费米子热格点量子色动力学的相结构

Phase structure of thermal lattice QCD with N_f=2 twisted mass Wilson fermions

E. -M. Ilgenfritz, K. Jansen, M. P. Lombardo, M. Müller-Preußker, M. Petschlies, O. Philipsen, L. Zeidlewicz

摘要:

本文给出了有限温度下格点量子色动力学在扭曲质量Wilson费米子和三能级Symanzik改进规范作用量下的相图的数值结果。我们的模拟是在时间范围N_τ=8,晶格耦合β从强耦合到标度域的晶格上进行的。在晶格耦合β、跳跃质量参数κ和扭曲质量参数μ所覆盖的空间范围内,我们得到了晶格理论丰富的相结构的全面图像。特别是,我们验证了在强耦合区域中的青木相的存在和在中间耦合处的夏普-辛格尔顿方案的实现。在弱耦合区域,我们确定的物理有限温度相变/交叉的相边界。它在三维参数空间中的形状与Creutz的锥形热过渡面猜想一致。

英文摘要:

We present numerical results for the phase diagram of lattice QCD at finite temperature in the formulation with twisted mass Wilson fermions and a tree-level Symanzik-improved gauge action. Our simulations are performed on lattices with temporal extent N_τ=8, and lattice coupling βranging from strong coupling to the scaling domain. Covering a wide range in the space spanned by the lattice coupling βand the hopping and twisted mass parameters κand μ, respectively, we obtain a comprehensive picture of the rich phase structure of the lattice theory. In particular, we verify the existence of an Aoki phase in the strong coupling region and the realisation of the Sharpe-Singleton scenario at intermediate couplings. In the weak coupling region we identify the phase boundary for the physical finite temperature phase transition/crossover. Its shape in the three-dimensional parameter space is consistent with Creutz's conjecture of a cone-shaped thermal transition surface.

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。

↑