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arXiv 2109.05041hep-phhep-ex
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从QCD计算强子对μ子$g-2$的贡献

On a novel evalutation of the hadronic contribution to the muon's $g-2$ from QCD

Marco Frasca, Anish Ghoshal, Stefan Groote

摘要:

通过导出量子色动力学(QCD)的低能极限,计算强子真空极化,计算了强子对μ子$g-2$的贡献。低能极限是一个非定域Nambu-Jona-Lasinio(NJL)模型,它的所有参数都是从QCD中固定的,唯一使用的实验输入是从强子物理测量中已知的约束尺度。我们的估计提供了一个新的分析替代目前的晶格计算,我们发现,我们的结果是接近类似的计算从实验数据。我们还评论如何这种分析方法的技术,在一般情况下,可以提供前瞻性的估计强子计算从暗部门和它的含义在BSM模型建设的未来。

英文摘要:

We evaluate the hadronic contribution to the $g-2$ of the muon by deriving the low-energy limit of quantum chromodynamics (QCD) and computing in this way the hadronic vacuum polarization. The low-energy limit is a non-local Nambu--Jona-Lasinio (NJL) model that has all the parameters fixed from QCD, and the only experimental input used is the confinement scale that is known from measurements of hadronic physics. Our estimations provide a novel analytical alternative to the current lattice computations and we find that our result is close to the similar computation performed from experimental data. We also comment on how this analytical approach technique, in general, may provide prospective estimates for hadronic computations from dark sectors and its implication in BSM model-building in future.

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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