Multiplicity of (mini-)jets at small x

We derive closed expressions for the mean and variance of the (mini-)jet mu ltiplicity distribution in hard scattering processes at low x. Here (mini-) jets are defined as those due to initial-state radiation of gluons with tra nsverse momenta greater than some resolution scale mu(R), where Lambda(2) m uch less than mu(R)(2) much less than Q(2), Lambda being the intrinsic QCD scale and Q the momentum transfer scale of the hard scattering. Our results are valid to leading order in log(1/x) but include all sub-leading logarit hms of Q(2)/mu(R)(2). As an illustration, we predict the mini-jet multiplic ity in Higgs boson production at the Large Hadron Collider.