ENERGY CONSERVATION and POMERON LOOPS in HIGH ENERGY EVOLUTION

A convenient approach to small-x evolution in QCD is the dipole picture which was formulated by Mueller a decade ago [1–3]. Mueller’s formalism leads to the BFKL equation but it also goes beyond the BFKL formalism, since here it is possible to take into account unitarisation effects due to multiple scatterings (multiple pomeron exchanges). In Mueller’s model dipoles in the same cascade (wavefunction) are, however, not allowed to interact and the model is therefore valid only in a limited range in rapidity, where this type of saturation effects can be ignored. Saturation effects are included in the so called Colour Glass Condensate (CGC) formalism [4,5], which is an effective theory for QCD valid at high gluon densities. The master equation within the CGC formalism is called the JIMWLK equation which in the weak field limit reduces to the BFKL equation. In this paper we continue to develop our model, introduced in [6], by adding Nc suppressed effects in the dipole evolution. We also improve our proton model and use it to study inclusive data from γp and pp collisions.