Pion structure from improved lattice QCD: form factor and charge radius at low masses

Abstract

The charge form factor of the pion is calculated in lattice QCD. The non-perturbatively improved Sheikholeslami-Wohlert action is used together with the $\mathcal{O}(a)$ improved vector current. Other choices for the current are examined. The form factor is extracted for pion masses from 970 MeV down to 360 MeV and for momentum transfers $Q^2\le 2{\mathrm{GeV}}^2$. The mean square charge radius is extracted, compared to previous determinations and its extrapolation to lower masses discussed.

12 pages REVTeX, 15 figures. Designation of currents clarified. Details concerning extraction of parameters added. Version accepted by Phys. Rev. D

References in corpus (18)

• Non-perturbative O(a) improvement of lattice QCD
• Measurement of the Charged Pion Electromagnetic Form Factor
• Non-perturbative determination of the axial current normalization constant in O(a) improved lattice QCD
• Accurate Scale Determinations for the Wilson Gauge Action
• Scaling of Non-Perturbatively O(a) Improved Wilson Fermions: Hadron Spectrum, Quark Masses and Decay Constants
• Order a improved renormalization constants
• Quenched QCD with O(a) improvement: I. The spectrum of light hadrons
• Efficient Hadronic Operators in Lattice Gauge Theory
• Quenched Chiral Perturbation Theory to one loop
• Non-perturbative O(a) improvement of the vector current
• Calculation and Interpretation of Hadron Correlation Functions in Lattice QCD
• Non-perturbative renormalisation and improvement of the local vector current for quenched and unquenched Wilson fermions
• Probing hadron wave functions in Lattice QCD
• Meson Screening Masses at high Temperature in quenched QCD with improved Wilson Quarks
• Bethe-Salpeter Amplitudes and Density Correlations for Mesons with Wilson Fermions
• Continuum Moment Equations on the Lattice
• Problems with the Quenched Approximation in the Chiral Limit
• The pion form factor in improved lattice QCD

Cited by in corpus (22)

• Charged pion form factor between Q^2=0.60 and 2.45 GeV^2. II. Determination of, and results for, the pion form factor
• Hadron structure from lattice quantum chromodynamics
• Perspective on rainbow-ladder truncation
• QCD modeling of hadron physics
• The pion form factor from lattice QCD with two dynamical flavours
• Electromagnetic form factor of the pion from twisted-mass lattice QCD at Nf=2
• Pseudoscalar and vector meson form factors from lattice QCD
• Lattice Computations of the Pion Form Factor
• Pion form factors from two-flavor lattice QCD with exact chiral symmetry
• Pseudoscalar and vector mesons as q\bar{q} bound states
• Extrapolations of Lattice Meson Form Factors
• Light meson electromagnetic form factors from three-flavor lattice QCD with exact chiral symmetry
• Twisted mass QCD for the pion electromagnetic form factor
• Pion constituent quarks couplings strong form factors: a dynamical approach
• A lattice calculation of the pion form factor with Ginsparg-Wilson-type fermions
• Charged pion electric polarizability from four-point functions in lattice QCD
• Pion wave function from lattice QCD vs. chiral quark models
• The electromagnetic form factor of the pion: Results from the lattice
• Pion form factor with twisted mass QCD
• Pion form factor using domain wall valence and asqtad sea quarks
• Pion form factor with chirally improved fermions
• Electromagnetic vertex function of the pion at T > 0