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arXiv · hep-ph/9906550

Studying the Perturbative Reggeon

S. Griffiths·D. A. Ross
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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 Q^2 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.

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S. Griffiths, D. A. Ross. 1999-06-30. Studying the Perturbative Reggeon. https://doi.org/10.1007/s100529900240

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