On the phase structure of twisted mass lattice QCD
On the phase structure of twisted mass lattice QCD
复制标题
扭曲质量晶格QCD的相结构
DOI：
10.1088/1126-6708/2004/09/035
复制
发表时间：
2004
期刊：
影响因子：
--
通讯作者：
G. Munster
中科院分区：
文献类型：
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作者：
G. Munster
引入手性扭曲质量项被认为是一种有吸引力的方法来改善晶格上威尔森费米子的量子色动力学。对于数值模拟工程来说，了解理论在小夸克质量区域的相结构是很重要的。我们在手性微扰理论的框架下研究了这个问题。推广Sharpe和Singleton的分析，得到了正常相和Aoki相情形的扩展，以及一个手性对称性自发击穿的可能的新相到离散的$Z_2$。
The introduction of a chirally twisted mass term has been proposed as an attractive approach to O(a) improvement of Quantum Chromodynamics with Wilson fermions on a lattice. For numerical simulation projects it is important to know the phase structure of the theory in the region of small quark masses. We study this question in the framework of chiral perturbation theory. Generalizing the analysis of Sharpe and Singleton we find extensions of normal and Aoki phase scenarios and a possible new phase with spontaneous breakdown of chiral symmetry to a discrete $Z_2$.