The hadronic vacuum polarization function with O(a)-improved Wilson fermions - an update

2016/02/12 by Michele Della Morte, Gregorio Herdoíza, Gregorio Herdoiza +11
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-lat

paper · pdf · doi:10.48550/arxiv.1602.03976

7 pages, 3 figures in PoS LATTICE2015 (2015) 111

arxiv created 2016/02/12 · openalex publication_date 2016/02/12 · arxiv updated 2016/02/15 · openalex created_date 2022/10/05 · openalex updated_date 2026/07/28

Abstract

We present an update of our lattice QCD study of the vacuum polarization function using O(a)-improved N_ \rm f =2 Wilson fermions with increased statistics and a large set of momenta. The resulting points are highly correlated and thus require a correlated fitting procedure. We employ an extended frequentist method to estimate the systematic uncertainties due to the momentum dependence and to the continuum and chiral extrapolations. We present preliminary results of the leading order hadronic contribution of the anomalous magnetic moment of the muon (a_μ^HLO) at the physical point for u,d,s and c valence quarks.

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