论文标题
重新审视Quarkonium相关器的时刻，强耦合常数
Strong coupling constant from moments of quarkonium correlators revisited
论文作者
论文摘要
我们从（2+1）-Fravor QCD中的Quarkonium相关器的力矩开始对强耦合常数进行先前的确定。我们使用先前计算出的矩，以高度改进的交错夸克（HISQ）动作获得了五个不同的夸克质量和几个晶格间距。我们执行矩矩的仔细连续性外推，从这些矩与扰动结果的比较中，我们确定QCD lambda参数，$λ_{\ overline {ms}}}}^{n_f = 3} = 332 \ 332 \ pm 17 \ pm 2（比例）$ MEV。这对应于$α_s^{n_f = 5}（μ= m_z）= 0.1177（12）$。
We revisit previous determination of the strong coupling constant from moments of quarkonium correlators in (2+1)-flavor QCD. We use previously calculated moments obtained with Highly Improved Staggered Quark (HISQ) action for five different quark masses and several lattice spacings. We perform a careful continuum extrapolations of the moments and from the comparison of these to the perturbative result we determine the QCD Lambda parameter, $Λ_{\overline{MS}}^{n_f=3}=332 \pm 17 \pm 2(scale)$ MeV. This corresponds to $α_s^{n_f=5}(μ=M_Z)=0.1177(12)$.
