Calculation of the Nucleon Axial Form Factor Using Staggered Lattice QCD

Abstract

The nucleon axial form factor is a dominant contribution to errors in neutrino oscillation studies. Lattice QCD calculations can help control theory errors by providing first-principles information on nucleon form factors. In these proceedings, we present preliminary results on a blinded calculation of $g_A$ and the axial form factor using HISQ staggered baryons with 2+1+1 flavors of sea quarks. Calculations are done using physical light quark masses and are absolutely normalized. We discuss fitting form factor data with the model-independent $z$ expansion parametrization.

arXiv comment7 pages, 3 figures

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Cited by in corpus (2)

• Nucleon Axial Radius and Muonic Hydrogen - A New Analysis and Review
• Review of experimental and theoretical status of the proton radius puzzle