中文

来自格点 QCD 的轻夸克连通中间窗口对缪子 $g-2$ 强子真空极化的贡献

高能物理 - 格点 2023-06-30 v3 高能物理 - 唯象学

摘要

我们给出与缪子反常磁矩 aμHVP,LOa_\mu^{\mathrm{HVP,LO}} 领头阶强子真空极化贡献相关的窗口可观测量之轻夸克连通贡献的格点 QCD 计算。我们采用 MILC 合作组的同位旋对称 QCD 规范场系综,其包含四种味动力学高度改进交错夸克,格距介于 a0.06a\approx 0.06-0.150.15~fm 且夸克质量接近物理值。我们考虑若干基于有效场论的有限体积与其他格点修正方案,并通过贝叶斯模型平均合并结果,以获得对相关系统不确定度的稳健估计。解盲后,我们对中间窗口与“W2”窗口的最终结果分别为 aμll,W(conn.)=206.6(1.0)×1010a^{ll,{\mathrm W}}_{\mu}(\mathrm{conn.})=206.6(1.0) \times 10^{-10}aμll,W2(conn.)=100.7(3.2)×1010a^{ll,\mathrm {W2}}_{\mu}(\mathrm{conn.}) = 100.7(3.2)\times 10^{-10}

关键词

引用

@article{arxiv.2301.08274,
  title  = {Light-quark connected intermediate-window contributions to the muon $g-2$ hadronic vacuum polarization from lattice QCD},
  author = {Alexei Bazavov and Christine Davies and Carleton DeTar and Aida X. El-Khadra and Elvira Gámiz and Steven Gottlieb and William I. Jay and Hwancheol Jeong and Andreas S. Kronfeld and Shaun Lahert and G. Peter Lepage and Michael Lynch and Andrew T. Lytle and Paul B. Mackenzie and Craig McNeile and Ethan T. Neil and Curtis T. Peterson and Gaurav Ray and James N. Simone and Ruth S. Van de Water and Alejandro Vaquero},
  journal= {arXiv preprint arXiv:2301.08274},
  year   = {2023}
}

备注

v3: Updated to reflect published version, which includes updates to the text in Sections II.B, III.C,D,E. Numerical results unchanged