Axial Nucleon form factors from lattice QCD

Abstract

We present results on the nucleon axial form factors within lattice QCD using two flavors of degenerate twisted mass fermions. Volume effects are examined using simulations at two volumes of spatial length $L=2.1$ fm and $L=2.8$ fm. Cut-off effects are investigated using three different values of the lattice spacings, namely $a=0.089$ fm, $a=0.070$ fm and $a=0.056$ fm. The nucleon axial charge is obtained in the continuum limit and chirally extrapolated to the physical pion mass enabling comparison with experiment.

ETM Collaboration, 14 pages, 12 figures

References in corpus (5)

• Twisted mass lattice QCD
• Light baryon masses with dynamical twisted mass fermions
• Axial, induced pseudoscalar, and pion-nucleon form factors in manifestly Lorentz-invariant chiral perturbation theory
• Axial coupling constant of the nucleon for two flavours of dynamical quarks in finite and infinite volume
• Renormalization constants for 2-twist operators in twisted mass QCD

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