DOI 10.1007/s100529900240
Studying the perturbative Reggeon
S. Griffiths, D.A. Ross
Physics Department,
University of Southampton,
Southampton SO17 1BJ, UK
Received: 30 June 1999 / Published online: 16 November 1999
Abstract
We consider the flavour non-singlet Reggeon within the context of
perturbative QCD. This consists of ladders built out of "reggeized''
quarks. We propose a method for the numerical solution of the
integro-differential equation for the amplitude describing the
exchange of such a Reggeon. The solution is known to have a sharp
rise at low values of Bjorken-x when applied to non-singlet
quantities in deep-inelastic scattering. We show that when the
running of the coupling is taken into account this sharp rise is
further enhanced, although the Q2 dependence is suppressed by the
introduction of the running coupling. We also investigate the effects
of simulating non-perturbative physics by introducing a constituent
mass for the soft quarks and an effective mass for the soft gluons
exchanged in the t-channel.
Copyright Springer-Verlag 2000
