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arXiv 1707.09404hep-ph
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具有校准不确定度的粲夸克质量

Charm Quark Mass with Calibrated Uncertainty

Jens Erler, Pere Masjuan, Hubert Spiesberger

摘要:

我们从微扰QCD中计算的矢量流相关矩的QCD求和规则确定了粲夸克质量${\hat m}_c({\hat m}_c)$。在我们的方法中,只需要低于连续阈值的魅力共振的实验数据,而连续贡献是通过要求各种求和规则之间的自洽性来确定的,包括零阶矩。然后,可以使用来自连续区的现有数据来限制理论误差。我们的结果是$\hatα_s(M_Z) = 0.1182$的${\hat m}_c({\hat m}_c) = 1272 \pm 8$ MeV。特别注意的问题是如何量化和证明的不确定性。

英文摘要:

We determine the charm quark mass ${\hat m}_c({\hat m}_c)$ from QCD sum rules of moments of the vector current correlator calculated in perturbative QCD. Only experimental data for the charm resonances below the continuum threshold are needed in our approach, while the continuum contribution is determined by requiring self-consistency between various sum rules, including the one for the zeroth moment. Existing data from the continuum region can then be used to bound the theoretical error. Our result is ${\hat m}_c({\hat m}_c) = 1272 \pm 8$ MeV for $\hatα_s(M_Z) = 0.1182$. Special attention is given to the question how to quantify and justify the uncertainty.

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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