Nucleon electromagnetic form factors from lattice QCD using a nearly physical pion mass

Abstract

We present lattice QCD calculations of nucleon electromagnetic form factors using pion masses $m_{\pi }$ = 149, 202, and 254 MeV and an action with clover-improved Wilson quarks coupled to smeared gauge fields, as used by the Budapest-Marseille-Wuppertal collaboration. Particular attention is given to removal of the effects of excited state contamination by calculation at three source-sink separations and use of the summation and generalized pencil-of-function methods. The combination of calculation at the nearly physical mass $m_{\pi }$ = 149 MeV in a large spatial volume ($m_{\pi }{L}_s$ = 4.2) and removal of excited state effects yields agreement with experiment for the electric and magnetic form factors $G_E(Q^2)$ and $G_M(Q^2)$ up to $Q^2$ = 0.5 GeV${}^2$.

v2: published version; 30 pages, 25 figures, 6 tables

References in corpus (11)

• On the generalized eigenvalue method for energies and matrix elements in lattice field theory
• Global analysis of proton elastic form factor data with two-photon exchange corrections
• Dispersion analysis of the nucleon form factors including meson continua
• Nucleon electromagnetic form factors
• The Flavor Structure of the Excited Baryon Spectra from Lattice QCD
• The size of the proton - closing in on the radius puzzle
• The nucleon electromagnetic form factors from Lattice QCD
• Rationale for UV-filtered clover fermions
• Electromagnetic form factors of the nucleon: new fit and analysis of uncertainties
• Nucleon structure with two flavors of dynamical domain-wall fermions
• External Momentum, Volume Effects, and the Nucleon Magnetic Moment

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