Nucleon form factors and couplings with $N_\mathrm{f} = 2 + 1$ Wilson fermions

Dalibor Djukanovic; Tim Harris; Georg von Hippel; Parikshit Junnarkar; Harvey B. Meyer; Hartmut Wittig

Nucleon form factors and couplings with $N_\mathrm{f} = 2 + 1$ Wilson fermions

High Energy Physics - Lattice 2017-03-01 v2

Authors: Dalibor Djukanovic , Tim Harris , Georg von Hippel , Parikshit Junnarkar , Harvey B. Meyer , Hartmut Wittig

Abstract

We present updated results on the nucleon electromagnetic form factors and axial coupling calculated using CLS ensembles with $N_\mathrm{f}=2+1$ dynamical flavours of Wilson fermions. The measurements are performed on large, fine lattices with a pseudoscalar mass reaching down to 200 MeV. The truncated-solver method is employed to reduce the variance of the measurements. Estimation of the matrix elements is challenging due to large contamination from excited states and further investigation is necessary to bring these effects under control.

Keywords

nucleon form factors axial coupling Wilson fermions lattice QCD truncated-solver method CLS ensembles

Cite

@article{arxiv.1611.07918,
  title  = {Nucleon form factors and couplings with $N_\mathrm{f} = 2 + 1$ Wilson fermions},
  author = {Dalibor Djukanovic and Tim Harris and Georg von Hippel and Parikshit Junnarkar and Harvey B. Meyer and Hartmut Wittig},
  journal= {arXiv preprint arXiv:1611.07918},
  year   = {2017}
}

Comments

corrected reference; 7 pages, 4 figures, talk presented at 34th annual International Symposium on Lattice Field Theory, 24-30 July 2016, University of Southampton, UK

Nucleon form factors and couplings with $N_\mathrm{f} = 2 + 1$ Wilson fermions

Abstract

Keywords

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