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arXiv 1401.0832hep-ph
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单介子对μ子反常磁矩的贡献

Single meson contributions to the muon's anomalous magnetic moment

Vladyslav Pauk, Marc Vanderhaeghen

摘要:

我们发展了一种改进的形式,通过考虑单个介子对主导赝标介子的贡献,对μ子反常磁矩a μ的强子逐光修正提供了一个改进的估计。我们将现有的实验输入,以及从光的光散射求和规则的限制,以估计轴矢量,标量和张量介子的影响。我们给出了这些态对a_μ的强子逐光贡献的数值计算。提出的形式主义允许进一步改善这些估计,一旦新的数据,这样的介子国家将成为可用。

英文摘要:

We develop the formalism to provide an improved estimate for the hadronic light-by-light correction to the muon's anomalous magnetic moment a_μ, by considering single meson contributions beyond the leading pseudo-scalar mesons. We incorporate available experimental input as well as constraints from light-by-light scattering sum rules to estimate the effects of axial-vector, scalar, and tensor mesons. We give numerical evaluations for the hadronic light-by-light contribution of these states to a_μ. The presented formalism allows to further improve on these estimates, once new data for such meson states will become available.

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