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arXiv 1201.1883hep-lat
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格点强动力学Schrodinger泛函的微扰改进

Perturbative Improvement of the Schrodinger Functional for Lattice Strong Dynamics

T. Karavirta, K. Rummukainen, K. Tuominen

摘要:

为了确定SU(2)和SU(3)规范理论在超标准模型唯象学中的应用是否满足共形窗口的要求,需要对它们在基本表象、伴随表象和双指数对称表象中的物质场进行格点模拟。威尔逊费米子作用的模拟受到人工制品的晶格间距$a$的线性,必须加以改进。我们提供了必要的系数微扰改进的边界项时,使用薛定谔泛函边界条件,并进一步表明,正确实施O(a)改进的行动是必要的可靠的结果。

英文摘要:

Lattice simulations on SU(2) and SU(3) gauge theories with matter fields in the fundamental, adjoint and two index symmetric representations are needed to determine if these theories are near or within the conformal window as required for their applications in beyond standard model phenomenology. Simulations with Wilson fermion action are subject to artifacts linear in the lattice spacing $a$, and must be improved. We provide the necessary coefficients for perturbative improvement of the boundary terms when using Schrodinger functional boundary conditions and furthermore show that correctly implemented O(a) improved actions are necessary for reliable results.

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