Gnome model and deep-inelastic lepton-nucleon structure functions

Abstract

We investigate the gnome model for hadrons, a nonet scheme which has been proposed as an alternative to the quark model and which avoids certain well-known difficulties of the latter concerning fractional charge, spin and statistics. It is found that the gnome model gives the same results as the quark model for semi-leptonic decay and electromagnetic transition matrix elements. The bounds for deep-inelastic lepton-nucleon structure functions are not as restrictive as the ones from the quark model if only SU(2) invariance is imposed. SU(3) invariance together with duality gives more restrictiven bounds.