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arXiv 0710.4454hep-lat
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具有单夸克味的QCD的强子谱

Hadron spectrum of QCD with one quark flavor

F. Farchioni, I. Montvay, G. Munster, E. E. Scholz, T. Sudmann, J. Wuilloud

摘要:

用蒙特卡罗模拟研究了单味QCD的强子谱。对规范场采用Symanzik树级改进的Wilson作用量,对费米子采用Wilson作用量。理论模拟的多项式混合蒙特卡罗算法(PHMC)。本文研究了两种不同格点间距a ~ 0.37r_0和a ~ 0.27r_0下强子束缚态的质量谱,对应于普通QCD中的~0.19fm和~0.13fm。格点扩张固定为L ~ 4.4r_0(~2.2fm)。最轻的模拟夸克质量对应于质量约为270 MeV的π介子。利用部分猝灭手征微扰理论(PQChPT)的思想分析了该理论的性质。单味理论的对称性可以通过加入额外的价夸克来人为地增强,这些额外的价夸克可以解释为u和d夸克。价π扇区中的算符可以建立。质量和衰变常数分析使用PQChPT公式在次领先的顺序。

英文摘要:

The hadron spectrum of one flavor QCD is studied by Monte Carlo simulations. The Symanzik tree-level-improved Wilson action is used for the gauge field and the Wilson action for the fermion. The theory is simulated by a polynomial hybrid Monte Carlo algorithm (PHMC). The mass spectrum of hadronic bound states is investigated at two different lattice spacings: a ~ 0.37r_0 and a ~ 0.27r_0, corresponding to ~0.19fm and ~0.13fm in ordinary QCD. The lattice extension is fixed to L ~ 4.4r_0 (~2.2fm). The lightest simulated quark mass corresponds to a pion with mass ~270MeV. Properties of the theory are analyzed by making use of the ideas of partially quenched chiral perturbation theory (PQChPT). The symmetry of the single flavor theory can be artificially enhanced by adding extra valence quarks, which can be interpreted as u and d quarks. Operators in the valence pion sector can be built. Masses and decay constants are analyzed by using PQChPT formulae at next-to-leading order.

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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