Higher twist corrections to Bjorken sum rule

Abstract

Some higher twist corrections to the Bjorken sum rule are estimated in the framework of a quark-diquark model of the nucleon. The parameters of the model have been previously fixed by fitting the measured higher twist corrections to the unpolarized structure function $F_2(x,Q^2)$. The resulting corrections to the Bjorken sum rule turn out to be negligible.

Comments: 7 pages, I Fig (ps file is available from levin@lafex.cbpf.br)