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arXiv 2305.20005hep-phhep-exhep-lat
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$τ$ 数据驱动的强子真空极化欧几里得窗口评估

$τ$ data-driven evaluation of Euclidean windows for the hadronic vacuum polarization

Pere Masjuan, Alejandro Miranda, Pablo Roig

AI总结:

本文首次用 $τ$ 数据计算强子真空极化对缪子 $g-2$ 的欧几里得窗口,结果与格点评估一致,尤其在中间窗口,有助于缓解 $e^+e^-$ 与格点结果的差异。

摘要:

我们首次计算了基于 $τ$ 数据驱动的强子真空极化对缪子 $g-2$ 贡献的欧几里得窗口。我们表明,基于 $τ$ 的结果与现有的格点窗口评估及完整结果一致。在中间窗口,所有格点评估都相当精确且一致,基于 $τ$ 的结果与它们兼容。这一点特别有趣,因为 $e^+e^-$ 数据驱动结果与该窗口中格点值的分歧是它们差异的主要原因,影响了对 $a_μ$ 测量在可能的新物理方面的解释。

英文摘要:

We compute for the first time the $τ$ data-driven Euclidean windows for the hadronic vacuum polarization contribution to the muon $g-2$. We show that $τ$-based results agree with the available lattice window evaluations and with the full result. On the intermediate window, where all lattice evaluations are rather precise and agree, $τ$-based results are compatible with them. This is particularly interesting, given that the disagreement of the $e^+e^-$ data-driven result with the lattice values in this window is the main cause for their discrepancy, affecting the interpretation of the $a_μ$ measurement in terms of possible new physics.

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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