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22-28 July 2018
Kellogg Hotel and Conference Center
EST timezone

Nucleon charges and quark momentum fraction with $N_f=2+1$ Wilson fermions

Jul 26, 2018, 12:00 PM
20m
106 (Kellogg Hotel and Conference Center)

106

Kellogg Hotel and Conference Center

219 S Harrison Rd, East Lansing, MI 48824
Hadron Structure Hadron Structure

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)

Presentation Materials