Excited state systematics in extracting nucleon electromagnetic form factors

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...

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Bibliographic Details
Published in:arXiv.org 2012-11
Main Authors: Capitani, Stefano, Michele Della Morte, Georg von Hippel, Jäger, Benjamin, Knippschild, Bastian, Meyer, Harvey B, Rae, Thomas D, Wittig, Hartmut
Format: Article
Language:English
Subjects:
Dependence
Fermions
Form factors
Online Access:Get full text
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Summary: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.
ISSN:2331-8422