Two-component colour dipole emission in the central region of onium-onium scattering

Abstract

The initial-state radiation of soft colour dipoles produced in the central region of onium-onium scattering via single QCD Pomeron exchange (BFKL) is calculated in the framework of Mueller's dipole approach. The resulting dipole production has a two-component structure. One is constant with energy while the other grows and possesses a power-law tail at appreciably large transverse distances from the collision axis. It may be related to the growth of the gluon distribution at small Bjorken-$x.$

Comments: 3 pages, latex, no figures, requires qcdparis.sty; Contribution to the PARIS Workshop DIS 95', April 19-24, 1995