Nucleon electromagnetic form factors at high Q2 from Wilson-clover fermions

Christos Kallidonis; Sergey Syritsyn; Michael Engelhardt; Jeremy Green; Stefan Meinel; John Negele; Andrew Pochinsky

Nucleon electromagnetic form factors at high Q² from Wilson-clover fermions

Christos Kallidonis, Sergey Syritsyn, Michael Engelhardt, Jeremy Green, Stefan Meinel, John Negele, Andrew Pochinsky

Physics

Research output: Contribution to journal › Conference article › peer-review

5 Scopus citations

Abstract

We present results on the nucleon electromagnetic form factors from Lattice QCD at momentum transfer up to about 12 GeV². We analyze two gauge ensembles with the Wilson-clover fermion action, a lattice spacing of a≈0.09 fm and pion masses m_π ≈170 MeV and m_π ≈280 MeV. In our analysis we employ momentum smearing as well as a set of techniques to investigate excited state effects. Good agreement with experiment and phenomenology is found for the ratios G_E/G_M and F₂/F₁, whereas discrepancies are observed for the individual form factors F₁ and F₂. We discuss various systematics that may affect our calculation.

Original language	English (US)
Article number	125
Journal	Proceedings of Science
Volume	334
State	Published - 2018
Event	36th Annual International Symposium on Lattice Field Theory, LATTICE 2018 - East Lansing, United States Duration: Jul 22 2018 → Jul 28 2018

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Cite this

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title = "Nucleon electromagnetic form factors at high Q2 from Wilson-clover fermions",

abstract = "We present results on the nucleon electromagnetic form factors from Lattice QCD at momentum transfer up to about 12 GeV2. We analyze two gauge ensembles with the Wilson-clover fermion action, a lattice spacing of a≈0.09 fm and pion masses mπ ≈170 MeV and mπ ≈280 MeV. In our analysis we employ momentum smearing as well as a set of techniques to investigate excited state effects. Good agreement with experiment and phenomenology is found for the ratios GE/GM and F2/F1, whereas discrepancies are observed for the individual form factors F1 and F2. We discuss various systematics that may affect our calculation.",

author = "Christos Kallidonis and Sergey Syritsyn and Michael Engelhardt and Jeremy Green and Stefan Meinel and John Negele and Andrew Pochinsky",

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T1 - Nucleon electromagnetic form factors at high Q2 from Wilson-clover fermions

AU - Kallidonis, Christos

AU - Syritsyn, Sergey

AU - Engelhardt, Michael

AU - Green, Jeremy

AU - Meinel, Stefan

AU - Negele, John

AU - Pochinsky, Andrew

N1 - Publisher Copyright: © Copyright Copyright owned owned by by the the author(s) author(s) under under the the terms terms of of the the Creative Creative Commons Commons Attribution-NonCommercial-ShareAlike Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0).

PY - 2018

Y1 - 2018

N2 - We present results on the nucleon electromagnetic form factors from Lattice QCD at momentum transfer up to about 12 GeV2. We analyze two gauge ensembles with the Wilson-clover fermion action, a lattice spacing of a≈0.09 fm and pion masses mπ ≈170 MeV and mπ ≈280 MeV. In our analysis we employ momentum smearing as well as a set of techniques to investigate excited state effects. Good agreement with experiment and phenomenology is found for the ratios GE/GM and F2/F1, whereas discrepancies are observed for the individual form factors F1 and F2. We discuss various systematics that may affect our calculation.

AB - We present results on the nucleon electromagnetic form factors from Lattice QCD at momentum transfer up to about 12 GeV2. We analyze two gauge ensembles with the Wilson-clover fermion action, a lattice spacing of a≈0.09 fm and pion masses mπ ≈170 MeV and mπ ≈280 MeV. In our analysis we employ momentum smearing as well as a set of techniques to investigate excited state effects. Good agreement with experiment and phenomenology is found for the ratios GE/GM and F2/F1, whereas discrepancies are observed for the individual form factors F1 and F2. We discuss various systematics that may affect our calculation.

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M3 - Conference article

AN - SCOPUS:85069975330

SN - 1824-8039

VL - 334

JO - Proceedings of Science

JF - Proceedings of Science

M1 - 125

T2 - 36th Annual International Symposium on Lattice Field Theory, LATTICE 2018

Y2 - 22 July 2018 through 28 July 2018

ER -

Nucleon electromagnetic form factors at high Q² from Wilson-clover fermions

Abstract

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