Nucleon form factors and couplings with $N_{\mathrm f}=2+1$ Wilson fermions
D. Djukanovic, T. Harris*, G. von Hippel, P. Junnarkar, H.B. Meyer and H. Wittig
Pre-published on:
February 27, 2017
Published on:
March 24, 2017
Abstract
We present updated results on the nucleon electromagnetic form factors and axial coupling calcu- lated using CLS ensembles with $N_\mathrm{f}=2+1$ dynamical flavours of Wilson fermions. The measure- ments 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.
DOI: https://doi.org/10.22323/1.256.0167
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