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arXiv 1111.1575hep-lathep-ph
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SU的红外行为（3）Nf=12的规范理论-关于共形不动点的存在性-

The Infrared behavior of SU(3) Nf=12 gauge theory -about the existence of conformal fixed point-

Kenji Ogawa, Tatsumi Aoyama, Hiroaki Ikeda, Etsuko Itou, Masafumi Kurachi, C. -J. David Lin, Hideo Matsufuru, Hiroshi Ohki, Tetsuya Onogi, Eigo Shintani, Takeshi Yamazaki

备注：
7 pages, 7 figures
发表信息：
PoS Lattice2011:081,2011
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摘要：

结合扭曲边界条件，Polyakov回路算符可以给出重整化耦合的定义。我们将此方案用于步长为s = 2的步长标度法中，搜索了12种无质量味的SU（3）规范理论的共形不动点.交错费米子和元格规范的作用中使用的晶格模拟与六个不同的晶格尺寸，L/a = 20，16，12，10，8和6。对于最大的晶格尺寸L/a = 20，我们使用了大量的图形处理单元（GPU），总共积累了3，000，000个轨迹。我们发现阶跃标度函数sigma（u）在低能区域与u一致。这意味着共形不动点的存在性。我们的分析和模拟的一些细节也将提出。

英文摘要：

Incorporated with twisted boundary condition, Polyakov loop correlators can give a definition of the renormalized coupling. We employ this scheme for the step scaling method (with step size s = 2) in the search of conformal fixed point of SU(3) gauge theory with 12 massless flavors. Staggered fermion and plaquette gauge action are used in the lattice simulation with six different lattice sizes, L/a = 20, 16, 12, 10, 8 and 6. For the largest lattice size, L/a = 20, we used a large number of Graphics Processing Units (GPUs) and accumulated 3,000,000 trajectories in total. We found that the step scaling function sigma (u) is consistent with u in the low-energy region. This means the existence of conformal fixed point. Some details of our analysis and simulations will also be presented.

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