arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2203.05070hep-phhep-exhep-lat
收藏

从实验数据估算三味夸克不连通对μ子反常磁矩的贡献

Evaluation of the three-flavor quark-disconnected contribution to the muon anomalous magnetic moment from experimental data

Diogo Boito, Maarten Golterman, Kim Maltman, Santi Peris

摘要:

我们指出,奇夸克连接和完整的三味夸克不连接对强子真空极化的贡献$a_μ^{\mathrm{LO,HVP}}$对μ子反常磁矩的贡献之和是一个物理可观测的量,并在同位旋极限下提供了一个基于数据的确定这个量的方法.结果$40.1(1.5)\times 10^{-10}$或$38.7(2.0)\times 10^{-10}$(取决于使用哪种数据编译)用作相同同位旋极限组合的晶格计算的比较目标。从这个结果中减去奇夸克连接贡献的晶格决定的平均值,也得到了对$a_μ^{\mathrm{LO,HVP}}$的同位旋极限三味不连接贡献的另一个决定。该测定的结果,$-13.3(1.5)\times 10^{-10}$或$-14.6(2.0)\times 10^{-10}$,取决于使用哪种数据编译,很好地吻合,并且与最精确的电流晶格测定具有竞争力。

英文摘要:

We point out that the sum of the strange-quark-connected and full, three-flavor quark-disconnected contributions to the leading-order hadronic vacuum polarization contribution, $a_μ^{\mathrm{LO,HVP}}$, to the anomalous magnetic moment of the muon, is a physical observable, and provide a data-based determination of this quantity in the isospin limit. The result, $40.1(1.5)\times 10^{-10}$, or $38.7(2.0)\times 10^{-10}$, depending on which data compilation is used, serves as a target of comparison for lattice calculations of the same isospin-limit combination. Subtracting from this result the average of lattice determinations of the strange-quark-connected contribution, one obtains also an alternate determination of the isospin-limit three-flavor disconnected contribution to $a_μ^{\mathrm{LO,HVP}}$. The result of this determination, $-13.3(1.5)\times 10^{-10}$, or $-14.6(2.0)\times 10^{-10}$, depending on which data compilation is used, agrees well and is competitive with the most precise current lattice determination.

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。

↑