AI Article Synopsis
- The research focuses on calculating the strange quark contributions to nucleon's electromagnetic form factors using lattice simulations with improved Wilson fermions.
- Multiple source-sink separations are explored to assess and minimize excited-state contamination in the results.
- The study utilizes six different simulation ensembles with varying lattice spacings and pion masses to ensure accurate chiral and continuum extrapolations, employing hierarchical probing to enhance the precision of quark-disconnected contributions.
Article Abstract
We present results for the strange contribution to the electromagnetic form factors of the nucleon computed on the coordinated lattice simulation ensembles with N_{f}=2+1 flavors of O(a)-improved Wilson fermions and an O(a)-improved vector current. Several source-sink separations are investigated in order to estimate the excited-state contamination. We calculate the form factors on six ensembles with lattice spacings in the range of a=0.049-0.086 fm and pion masses in the range of m_{π}=200-360 MeV, which allows for a controlled chiral and continuum extrapolation. In the computation of the quark-disconnected contributions, we employ hierarchical probing as a variance-reduction technique.
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| http://dx.doi.org/10.1103/PhysRevLett.123.212001 | DOI Listing |
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