Flavor structure of the nucleon electromagnetic form factors and transverse charge densities in the chiral quark–soliton model

Silva, António (Departamento de Engenharia Física, Faculdade de Engenharia, Universidade do Porto, rua Dr. Roberto Frias, 4200-465 Porto, Portugal) (Centro de Física do Porto, Faculdade de Ciências da Universidade do Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal) ; Urbano, Diana (Departamento de Engenharia Física, Faculdade de Engenharia, Universidade do Porto, rua Dr. Roberto Frias, 4200-465 Porto, Portugal) ; Kim, Hyun-Chul (Department of Physics, Inha University, Incheon 402-751, Korea) (School of Physics, Korea Institute for Advanced Study (KIAS), Seoul 130-722, Republic of Korea)

09 February 2018

Abstract: We investigate the flavor decomposition of the electromagnetic form factors of the nucleon, based on the chiral quark–soliton model ( QSM) with symmetry-conserving quantization. We consider the rotational and linear strange-quark mass ( ) corrections. We discuss the results of the flavor-decomposed electromagnetic form factors in comparison with the recent experimental data. In order to see the effects of the strange quark, we compare the SU(3) results with those of SU(2). Finally, we discuss the transverse charge densities for both unpolarized and polarized nucleons. The transverse charge density inside a neutron turns out to be negative in the vicinity of the center within the SU(3) QSM, which can be explained by the contribution of the strange quark.


Published in: PTEP 2018 (2018) 023D01
Published by: Oxford University Press/Physical Society of Japan
DOI: 10.1093/ptep/ptx190
arXiv: 1305.6373
License: CC-BY-3.0



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