Speaker
Mr
Jonas Wilhelm
(University of Mainz - Institut for Nuclear Physics)
Description
We present preliminary results for strange form factors of the nucleon computed on the CLS ensembles with $N_f=2+1$ flavours of O($a$)-improved Wilson fermions. Our calculations are performed at two values of the lattice spacing ($a \in \{0.064, 0.086\} \,\mathrm{fm}$) at a pion mass of $280 \,\mathrm{MeV}$. The determination of strange form factors proceeds by computing quark-disconnected diagrams, for which we employ hierarchical probing in four dimensions, in order to deal with this most challenging part of the calculation. Furthermore, we investigate several source-sink separations to check on excited-state contamination.
Primary author
Mr
Jonas Wilhelm
(University of Mainz - Institut for Nuclear Physics)
Co-authors
Dr
Georg von Hippel
(University of Mainz)
Prof.
Hartmut Wittig
(Johannes Gutenberg Universität)
Prof.
Harvey B. Meyer
(Johannes Gutenberg University Mainz)
Dr
Konstantin Ottnad
(University of Mainz)
Dr
Tim Harris
(Milano Bicocca)