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arXiv 1106.5293hep-lathep-ph
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基于2格点MCRG匹配的12费米子SU(3)规范模型的红外不动点

Infrared fixed point of the 12-fermion SU(3) gauge model based on 2-lattice MCRG matching

Anna Hasenfratz

摘要:

本文研究了一个具有12个基本费米子的SU(3)规范模型。这个强耦合系统的物理感兴趣的区域可以受到紫外固定点由于晶格文物。我建议使用规范作用量加上一个负伴随元格项来减少这个问题。我还介绍了一种新的分析方法,2晶格匹配蒙特卡罗重整化群技术,显着减少有限体积效应。这两个改进的结合使我能够测量裸阶标度函数的区域中的规范耦合,它显然是负的,这表明一个积极的重整化群$β$功能和红外保形。

英文摘要:

I investigate an SU(3) gauge model with 12 fundamental fermions. The physically interesting region of this strongly coupled system can be influenced by an ultraviolet fixed point due to lattice artifacts. I suggest to use a gauge action with an additional negative adjoint plaquette term that lessens this problem. I also introduce a new analysis method for the 2-lattice matching Monte Carlo renormalization group technique that significantly reduces finite volume effects. The combination of these two improvements allows me to measure the bare step scaling function in a region of the gauge coupling where it is clearly negative, indicating a positive renormalization group $β$ function and infrared conformality.

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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