Speaker
Mr
Miguel Salg
(University of Mainz)
Description
We present results for the isoscalar electromagnetic form factors of the nucleon computed on the CLS ensembles with $N_\mathrm{f} = 2 + 1$ flavors of $\mathcal{O}(a)$-improved Wilson fermions and an $\mathcal{O}(a)$-improved conserved vector current. In order to estimate the excited-state contamination, we investigate several source-sink separations and apply the summation method. For the computation of the quark-disconnected diagrams, a stochastic estimation using the one-end trick is employed. By these means, we obtain a clear signal for the form factors including the quark-disconnected contributions, which have a distinguishable effect on our data.
Primary author
Mr
Miguel Salg
(University of Mainz)
Co-authors
Dr
Dalibor Djukanovic
(Helmholtz Institute Mainz)
Georg von Hippel
(University of Mainz)
Harvey Meyer
(Johannes Gutenberg University Mainz)
Dr
Konstantin Ottnad
(University of Mainz)
Jonas Wilhelm
(Universität Mainz)
Hartmut Wittig
