Nucleon charges and quark momentum fraction with Nf=2+1 Wilson fermions
K. Ottnad*, T. Harris, H. Meyer, G. von Hippel, J. Wilhelm and H. Wittig
*: corresponding author
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Published on: May 29, 2019
Abstract
We present a nucleon structure analysis including local isovector charges as well as twist-2 operator insertions. Computations are performed on CLS ensembles with Nf=2+1 Wilson fermions, covering four values of the lattice spacing and pion masses down to Mπ200MeV. Several source-sink separations (typically 1.0fm to 1.5fm) allow us to assess excited-state contaminations. Results on each ensemble are obtained from simultaneous two-state fits including all observables and all available source-sink separations with the mass gap as a free fit parameter. Finally, the chiral, continuum and finite size extrapolation is performed to extract physical results.
DOI: https://doi.org/10.22323/1.334.0129
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