PoS - Proceedings of Science
Volume 334 - The 36th Annual International Symposium on Lattice Field Theory (LATTICE2018) - Hadron Structure
Nucleon electromagnetic form factors at high $Q^2$ from Wilson-clover fermions
C. Kallidonis*, S. Syritsyn, M. Engelhardt, J. Green, S. Meinel, J. Negele and A. Pochinsky
Full text: pdf
Published on: May 29, 2019
We present results on the nucleon electromagnetic form factors from Lattice QCD at momentum transfer up to about $12$ GeV$^2$. We analyze two gauge ensembles with the Wilson-clover fermion action, a lattice spacing of $a\approx 0.09$ fm and pion masses $m_\pi\approx 170$ MeV and $m_\pi\approx 280$ 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 $F_2/F_1$, whereas discrepancies are observed for the individual form factors $F_1$ and $F_2$. We discuss various systematics that may affect our calculation.
DOI: https://doi.org/10.22323/1.334.0125
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.