强子物理在线论坛 Hadron Physics Online Forum (HAPOF)
第一百零三期HAPOF论坛，Computation of the HVP contribution to the muon anomaly with precise lattice spacing determination，王根 博士，2024年09月20日
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Asia/Shanghai
Description
报告人：王根 博士（艾克斯-马赛大学） 报告时间：2024年09月20日 15：00 - 17：00 (北京时间) 会议链接：点击链接 腾讯会议室ID: 985668461 摘要： I will present the latest calculation of HVP contributions to muon anomaly with Lattice QCD from Budapest-Marseille-Wuppertal collaboration (BMWc). The result leads to a prediction 714.1(2.2) (2.5)[3.3]×10^{-10} that differs from the experimental measurement of a_μ by only 0.9 standard deviations. This provides a remarkable validation of the standard model to 0.37 ppm. Since the largest systematic uncertainty comes from the ratio between the intrinsic QCD scale and fermion masses, we measure the precise Ω baryon mass in lattice units at seven lattice spacings down to a≃0.048 fm with N_f=2+1+1 staggered quarks, including QED and strong-isospin corrections. We perform these measurements by solving the Generalized Eigenvalue Problem, adapted to staggered fermions to fully resolve the negative parity and excited states. The most precise intrinsic QCD scale parameter w_0=0.17245 (22)(46)[51] fm in the continuum limit at physical quark masses is determined using the physical Ω baryon mass, with unprecedented 0.3 percent precision. 报告人简介： 王根，2020 年博士毕业于美国肯塔基大学，现在艾克斯-马赛大学Budapest-Marseille-Wuppertal合作组下进行博士后研究。 主要研究方向为强子结构的高精度格点计算，如缪子反常磁矩、质子自旋分解、标准模型参数测定等。 特别鸣谢：本届论坛由彭桓武理论物理创新研究中心支持。
