Light hadrons from lattice QCD with light (u, d), strange and charm dynamical quarks
Light hadrons from lattice QCD with light (u, d), strange and charm dynamical quarks
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DOI：
10.1007/jhep06(2010)111
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发表时间：
2010-04
影响因子：
5.4
通讯作者：
R. Baron;P. Boucaud;Jaume Carbonell;A. Deuzeman;V. Drach;F. Farchioni;V. Giménez;G. Herdoiza
中科院分区：
文献类型：
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作者：
R. Baron;P. Boucaud;Jaume Carbonell;A. Deuzeman;V. Drach;F. Farchioni;V. Giménez;G. Herdoiza
本文用Wilson扭曲质量费米子在最大扭曲下对质量简并上下和质量分裂奇异和魅力（Nf = 2+ 1+ 1）动力学夸克进行了格点QCD模拟。奇异夸克和魅夸克质量的调谐是在两个值的晶格间距为一个0.078 fm和一个0.086 fm的晶格尺寸范围从L = 1：9 fm到L = 2：8 fm。我们在270 μ mPS ~ 510 MeV范围内测量了轻赝标质量mPS和衰变常数fPS，并确定了SU（2）手征微扰理论的低能参数f0和fPS。我们用两种格点间距值、几种格点尺寸以及不同的轻夸克、奇夸克和粲夸克质量值来探讨系统效应。第一次研究的离散化效应在轻夸克观测和N f= 2的结果进行比较。
We present results of lattice QCD simulations with mass-degenerate up and down and mass-split strange and charm (N f= 2+ 1+ 1) dynamical quarks using Wilson twisted mass fermions at maximal twist. The tuning of the strange and charm quark masses is performed at two values of the lattice spacing a≈ 0: 078 fm and a≈ 0: 086 fm with lattice sizes ranging from L≈ 1: 9 fm to L≈ 2: 8 fm. We measure with high statistical precision the light pseudoscalar mass m PS and decay constant f PS in a range 270≲ m PS≲ 510 MeV and determine the low energy parameters f 0 andof SU (2) chiral perturbation theory. We use the two values of the lattice spacing, several lattice sizes as well as different values of the light, strange and charm quark masses to explore the systematic effects. A first study of discretisation effects in light-quark observables and a comparison to N f= 2 results are performed.