Strange nucleon form factors: Solitonic approach to GM s , GE s , and and comparison with world data

K. Goeke; H. -C. Kim; A. Silva; D. Urbano

doi:10.1140/epja/i2006-10398-7

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2023 Impact factor 2.6

Hadrons and Nuclei

Eur. Phys. J. A (2007) 32: 393-397
https://doi.org/10.1140/epja/i2006-10398-7

PAVI 2006

Strange nucleon form factors: Solitonic approach to G_M ^s , G_E ^s , $\tilde{{G}}_{{A}}^{{p}}$ and $\tilde{{G}}_{{A}}^{{n}}$ and comparison with world data

K. Goeke¹^*, H. -C. Kim², A. Silva³^,4 and D. Urbano³^,4

¹ Institut für Theoretische Physik II, Ruhr-Universität Bochum, D-44780, Bochum, Germany
² Department of Physics and Nuclear Physics and Radiation Technology Institute (NuRI), Pusan National University, 609-735, Busan, Republic of Korea
³ Departamento de Fısica and Centro de Fısica Computacional, Universidade de Coimbra, P-3000, Coimbra, Portugal
⁴ Faculdade de Engenharia da Universidade do Porto, P-4200-465, Porto, Portugal

^* e-mail: Klaus.Goeke@tp2.ruhr-uni-bochum.de

Received: 31 August 2006
Accepted: 18 March 2007
Published online: 15 June 2007

Abstract

We summarize the results of the chiral quark-soliton model (χ QSM) concerning basically all form factors necessary to interpret the present data of the parity-violating electron scattering experiments SAMPLE, HAPPEX, A4 and G0. The results particularly focus on the recently measured asymmetries and the detailed data for various combinations of G _M ^s , G _E ^s , $\tilde{{G}}_{{A}}^{{p}}$ and $\tilde{{G}}_{{A}}^{{n}}$ at Q ² = 0.1 GeV^2. The calculations yield positive strange magnetic and electric form factors and a negative axial vector one, all being rather small. The results are very close to the combined experimental world data from parity-violating electron scattering and elastic νp and ¯ scattering.