Excited state systematics in extracting nucleon electromagnetic form factors

Stefano Capitani, Michele Della Morte, Georg von Hippel, Benjamin Jäger, Bastian Knippschild, Harvey B. Meyer, Thomas D. Rae, Hartmut Wittig

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

We present updated preliminary results for the nucleon electromagnetic form factors for non-perturbatively $\mathcal{O}(a)$ improved Wilson fermions in $N_f=2$ QCD measured on the CLS ensembles. The use of the summed operator insertion method allows us to suppress the influence of excited states in our measurements. A study of the effect that excited state contaminations have on the $Q^2$ dependence of the extracted nucleon form factors may then be made through comparisons of the summation method to standard plateau fits, as well as to excited state fits.
Original languageUndefined/Unknown
JournalPoS LAT
Publication statusPublished - 6. Nov 2012

Bibliographical note

7 pages, 3 figures, talk presented at the 30th International Symposium on Lattice Field Theory (Lattice 2012), Cairns, Australia, June 24-29, 2012

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