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arXiv 0809.5228hep-lat
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具有扭转质量Wilson费米子的格点量子色动力学的有限温度相结构

The finite-temperature phase structure of lattice QCD with twisted-mass Wilson fermions

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

摘要:

本文报道了我们在时间晶格尺寸N_τ=8的情况下,用扭曲质量Wilson费米子和树能级Symanzik改进规范作用量研究双味格点量子色动力学有限温度相结构的进展.将我们的调查扩展到更广泛的参数空间区域,我们获得了丰富的相结构的全局视图。我们确定了在足够高的β下,在零温度临界线附近的非零扭曲质量参数的有限温度转变/交叉。我们的研究结果是一致的Creutz猜想的圆锥形的有限温度过渡面。通过与非线性光学晶格手征微扰理论的比较,我们对这种形状有了更好的理解。

英文摘要:

We report progress in our exploration of the finite-temperature phase structure of two-flavour lattice QCD with twisted-mass Wilson fermions and a tree-level Symanzik-improved gauge action for a temporal lattice size N_τ=8. Extending our investigations to a wider region of parameter space we gain a global view of the rich phase structure. We identify the finite temperature transition/crossover for a non-vanishing twisted-mass parameter in the neighbourhood of the zero-temperature critical line at sufficiently high β. Our findings are consistent with Creutz's conjecture of a conical shape of the finite temperature transition surface. Comparing with NLO lattice chiral perturbation theory we achieve an improved understanding of this shape.

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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