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
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 Mπ≈200MeV. 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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