# 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

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

### Resumé

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.
Originalsprog Udefineret/Ukendt PoS LAT Udgivet - 6. nov. 2012

### Bibliografisk note

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

• hep-lat

### Citer dette

Capitani, S., Morte, M. D., Hippel, G. V., Jäger, B., Knippschild, B., Meyer, H. B., ... Wittig, H. (2012). Excited state systematics in extracting nucleon electromagnetic form factors. PoS LAT.
Capitani, Stefano ; Morte, Michele Della ; Hippel, Georg von ; Jäger, Benjamin ; Knippschild, Bastian ; Meyer, Harvey B. ; Rae, Thomas D. ; Wittig, Hartmut. / Excited state systematics in extracting nucleon electromagnetic form factors. I: PoS LAT. 2012.
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title = "Excited state systematics in extracting nucleon electromagnetic form factors",
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.",
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author = "Stefano Capitani and Morte, {Michele Della} and Hippel, {Georg von} and Benjamin J{\"a}ger and Bastian Knippschild and Meyer, {Harvey B.} and Rae, {Thomas D.} and Hartmut Wittig",
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Capitani, S, Morte, MD, Hippel, GV, Jäger, B, Knippschild, B, Meyer, HB, Rae, TD & Wittig, H 2012, 'Excited state systematics in extracting nucleon electromagnetic form factors', PoS LAT.

Excited state systematics in extracting nucleon electromagnetic form factors. / Capitani, Stefano; Morte, Michele Della; Hippel, Georg von; Jäger, Benjamin; Knippschild, Bastian; Meyer, Harvey B.; Rae, Thomas D.; Wittig, Hartmut.

I: PoS LAT, 06.11.2012.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Excited state systematics in extracting nucleon electromagnetic form factors

AU - Capitani, Stefano

AU - Morte, Michele Della

AU - Hippel, Georg von

AU - Jäger, Benjamin

AU - Knippschild, Bastian

AU - Meyer, Harvey B.

AU - Rae, Thomas D.

AU - Wittig, Hartmut

N1 - 7 pages, 3 figures, talk presented at the 30th International Symposium on Lattice Field Theory (Lattice 2012), Cairns, Australia, June 24-29, 2012

PY - 2012/11/6

Y1 - 2012/11/6

N2 - 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.

AB - 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.

KW - hep-lat

M3 - Tidsskriftartikel

JO - PoS LAT

JF - PoS LAT

ER -

Capitani S, Morte MD, Hippel GV, Jäger B, Knippschild B, Meyer HB et al. Excited state systematics in extracting nucleon electromagnetic form factors. PoS LAT. 2012 nov 6.