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arXiv 0812.0570hep-lat
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费米子在更高的表示。关于伴随费米子的SU(2)的一些结果

Fermions in higher representations. Some results about SU(2) with adjoint fermions

Luigi Del Debbio, Agostino Patella, Claudio Pica

摘要:

讨论了色群任意表示的费米子规范理论的格点形式,并给出了模拟动态Wilson费米子的RHMC算法的实现.第一个数据集的SU(2)规范理论与两个费米子的伴随表示,已被提出作为一个可能的人工色候选人。模拟是在8^3x16晶格上以固定的晶格间距进行的。计算了PCAC介子的质量、赝标介子质量、矢量介子质量、轴向介子质量和赝标介子衰变常数。外推到手征极限进行了讨论。然而,需要更广泛的调查,以控制系统误差的数值结果,然后详细了解这些理论的相位结构。

英文摘要:

We discuss the lattice formulation of gauge theories with fermions in arbitrary representations of the color group, and present the implementation of the RHMC algorithm for simulating dynamical Wilson fermions. A first dataset is presented for the SU(2) gauge theory with two fermions in the adjoint representation, which has been proposed as a possible technicolor candidate. Simulations are performed on 8^3x16 lattices, at fixed lattice spacing. The PCAC mass, the pseudoscalar, vector and axial meson masses, the pseudoscalar meson decay constant are computed. The extrapolation to the chiral limit is discussed. However more extensive investigations are needed in order to control the systematic errors in the numerical results, and then understand in detail the phase structure of these theories.

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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