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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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
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Dependence
Fermions
Form factors
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Michele Della Morte
Georg von Hippel
Jäger, Benjamin
Knippschild, Bastian
Meyer, Harvey B
Rae, Thomas D
Wittig, Hartmut
description 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.
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subjects Dependence
Fermions
Form factors
title Excited state systematics in extracting nucleon electromagnetic form factors
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