Strong coupling constant from moments of quarkonium correlators revisited

Strong coupling constant from moments of quarkonium correlators revisited
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重新审视夸克素相关器矩的强耦合常数

DOI:
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发表时间:
2020
期刊:
The European Physical Journal C
影响因子:
--
通讯作者:
J. Weber
J. Weber
中科院分区:
--
文献类型:
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作者:
P. Petreczky;J. Weber

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我们回顾了以前在(2 + 1)味QCD中用夸克偶素动量确定强耦合常数的方法。我们使用以前计算的时刻与高度改进交错夸克(HISQ)行动五个不同的夸克质量和几个晶格间距。我们对这些矩进行了仔细的连续外推,并将其与微扰结果进行比较,我们确定了QCD λ参数,$$\varLambda _{\overline{MS}}^{n_f=3}=332 \pm 17 \pm 2(scale)$$ Λ MS <$n f = 3 = 332 ± 17 ± 2(s c a l e)MeV。这对应于$$\alpha _s^{n_f=5}(\mu =M_Z)=0.1177(12)$$ 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, $$\varLambda _{\overline{MS}}^{n_f=3}=332 \pm 17 \pm 2(scale)$$ Λ MS ¯ n f = 3 = 332 ± 17 ± 2 ( s c a l e ) MeV. This corresponds to $$\alpha _s^{n_f=5}(\mu =M_Z)=0.1177(12)$$ α s n f = 5 ( μ = M Z ) = 0.1177 ( 12 ) .
DOI: 10.1016/j.cpc.2017.11.014
发表时间: 2017-03
期刊: Comput. Phys. Commun.
影响因子: --
作者:
Florian Herren;M. Steinhauser
通讯作者: Florian Herren;M. Steinhauser