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arXiv 0907.0919hep-lat
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用Monte Carlo重整化群匹配研究超QCD理论的临界性质

Investigating the critical properties of beyond-QCD theories using Monte Carlo Renormalization Group matching

Anna Hasenfratz

摘要:

蒙特卡罗重整化群(MCRG)方法被设计用于研究统计系统和量子场论的非微扰相结构和临界行为。我采用了20世纪80年代广泛使用的2-格点匹配方法,并展示了它是如何被用来预测非微扰不动点的存在性及其相关的临界指数在许多风味SU(3)规范理论。这项工作用于测试该方法,我研究了相对较好理解的系统:$N_f=0$、4和16风味模型。纯规范体系和$N_f=4$体系是禁闭的、手征破缺的,MCRG方法可以预言它们的裸阶标度函数。$N_f=16$模型的结果表明,存在一个红外固定点,几乎边缘规范耦合。我提出了初步的结果,在这个新的固定点的质量的缩放尺寸。

英文摘要:

Monte Carlo Renormalization Group (MCRG) methods were designed to study the non-perturbative phase structure and critical behavior of statistical systems and quantum field theories. I adopt the 2-lattice matching method used extensively in the 1980's and show how it can be used to predict the existence of non-perturbative fixed points and their related critical exponents in many flavor SU(3) gauge theories. This work serves to test the method and I study relatively well understood systems: the $N_f=0$, 4 and 16 flavor models. The pure gauge and $N_f=4$ systems are confining and chirally broken and the MCRG method can predict their bare step scaling functions. Results for the $N_f=16$ model indicate the existence of an infrared fixed point with nearly marginal gauge coupling. I present preliminary results for the scaling dimension of the mass at this new fixed point.

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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