报告题目：Computation of the HVP contribution to the muon anomaly with precise lattice spacing determination
报告人：王根 博士 （Aix-Marseille University）
报告时间：2024年9月13日 下午2:30
报告地点：理8栋118学术报告厅
报告内容：
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 $714.1(2.2)(2.5)[3.3] \times 10^{-10}$ that differs from the experimental measurement of $a_\mu$ 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：
Gen Wang graduated from University of Kentucky, US and current postdoc at Aix-Marseille University, France under Budapest-Marseille-Wuppertal collaboration. His main research interest is on high-precision lattice calculation of the hadron structure, such as muon anomalous magnetic moment, proton spin decompositions and standard model parameter determinations.