Nucleon electromagnetic form factors and axial charge from CLS $N_\mathrm{f}=2+1$ ensembles

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

Nucleon electromagnetic form factors and axial charge from CLS $N_\mathrm{f}=2+1$ ensembles

High Energy Physics - Lattice 2015-11-25 v1

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

Abstract

We present preliminary results on the electromagnetic form factors and axial charge of the nucleon from ensembles generated by the CLS effort with $N_\mathrm{f}=2+1$ flavours of non-perturbatively $\mathrm{O}(a)$ -improved Wilson fermions and open temporal boundary conditions. Systematic effects due to excited-state contamination are accounted for using both two-state fits and the method of summed operator insertions. This exploratory analysis demonstrates the viability of obtaining precision baryon observables with $N_\mathrm{f}=2+1$ flavours of Wilson fermions on fine lattices, aiming towards controlled chiral and continuum limits in the future.

Keywords

nucleon electromagnetic form factors axial charge CLS ensembles N_f=2+1 Wilson fermions excited-state contamination two-state fits summed operator insertions

Cite

@article{arxiv.1511.07481,
  title  = {Nucleon electromagnetic form factors and axial charge from CLS $N_\mathrm{f}=2+1$ ensembles},
  author = {Dalibor Djukanovic and Tim Harris and Georg von Hippel and Parikshit Junnarkar and Harvey B. Meyer and Hartmut Wittig},
  journal= {arXiv preprint arXiv:1511.07481},
  year   = {2015}
}

Comments

7 pages, 4 figures; contribution to the proceedings of the 33rd International Symposium on Lattice Field Theory, July 14-18, 2015, Kobe, Japan

Nucleon electromagnetic form factors and axial charge from CLS $N_\mathrm{f}=2+1$ ensembles

Abstract

Keywords

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