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]x10-10 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.

Biography

Dr. 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.