Speaker
Dr
Konstantin Ottnad
(University of Mainz)
Description
We present a nucleon structure analysis including the charges of isovector dimension-three operators as well as the forward matrix elements of twist-2, dimension-four operators. Computations are performed on CLS ensembles with $N_f=2+1$ Wilson fermions, covering four values of the lattice spacing and pion masses down to $M_\pi \approx 200\,\mathrm{MeV}$. Several source-sink separations (typically $\sim 1.0\,\mathrm{fm}$ to $\sim 1.5\,\mathrm{fm}$) allow us to assess excited-state contaminations. Results on each ensemble are obtained from simultaneous two-state fits including all observables and all available source-sink separations with the mass gap as a free fit parameter. Finally, the chiral and continuum extrapolation is performed to extract physical results.
Primary author
Dr
Konstantin Ottnad
(University of Mainz)
Co-authors
Dr
Georg von Hippel
(University of Mainz)
Prof.
Hartmut Wittig
(Johannes Gutenberg Universität)
Prof.
Harvey B. Meyer
(Johannes Gutenberg University Mainz)
Mr
Jonas Wilhelm
(University of Mainz - Institut for Nuclear Physics)
Dr
Tim Harris
(Milano Bicocca)