Twisted mass QCD for the pion electromagnetic form factor
arXiv:hep-lat/0410047 · doi:10.1103/PhysRevD.71.014503
Abstract
The pion form factor is computed using quenched twisted mass QCD and the GMRES-DR matrix inverter. The momentum averaging procedure of Frezzotti and Rossi is used to remove leading lattice spacing artifacts, and numerical results for the form factor show the expected improvement with respect to the standard Wilson action. Although some matrix inverters are known to fail when applied to twisted mass QCD, GMRES-DR is found to be a viable and powerful option. Results obtained for the pion form factor are consistent with the published results from other O(a) improved actions and are also consistent with the available experimental data.
19 pages, 12 figures
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- Constrained Curve Fitting
- The nucleon's strange electromagnetic and scalar matrix elements
- Scaling test for Wilson twisted mass QCD
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Cited by in corpus (15)
- Charged pion form factor between Q^2=0.60 and 2.45 GeV^2. II. Determination of, and results for, the pion form factor
- 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
- Quenched Scaling of Wilson twisted mass fermions
- Spectrum of quenched twisted mass lattice QCD at maximal twist
- Flavour Breaking Effects of Wilson twisted mass fermions
- Light quarks with twisted mass fermions
- Extrapolations of Lattice Meson Form Factors
- Parton Distribution Functions with Twisted Mass Fermions
- A lattice calculation of the pion form factor with Ginsparg-Wilson-type fermions
- First results with two light flavours of quarks with maximally twisted mass
- Chiral perturbation theory for twisted mass QCD at small quark mass