Eur. Phys. J. A (2007) 32: 403-407
https://doi.org/10.1140/epja/i2006-10407-y

PAVI 2006

Flavor content of nucleon form factors in a VMD approach

Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, AP 70-543, 04510, México DF, Mexico

^* e-mail: bijker@nucleares.unam.mx

Received: 31 August 2006
Accepted: 18 March 2007
Published online: 21 June 2007

Abstract

The strange form factors of the nucleon are studied in a two-component model consisting of a three-quark intrinsic structure surrounded by a meson cloud. A comparison with the available experimental world data from the SAMPLE, PVA4, HAPPEX and G0 Collaborations shows a good overall agreement. It is shown that the strangeness contribution to the electric and magnetic form factors is of the order of a few percent. In particular, the strange quark contribution to the charge radius is small 〈r ² _s〉_E = 0.005 fm^2 and to the magnetic moment it is positive μ_s = 0.315 μ_N .