Multiparticle production in small-x deep inelastic scattering and the
  nature of the Pomeron

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Abstract

Properties of multiparticle final states produced in the central rapidity region of small-x deep inelastic scattering (DIS) are discussed. It is pointed out that these properties contain important information on the nature of the Pomeron - used for the description of total cross section and diffractive production in DIS. It is shown that models based on universality of the Pomeron predict charged particle multiplicities in small-x DIS which are in good agreement with recent HERA results.

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On the pomeranchuk singularity in asymptotically free theories

V.S. Fadin, E.A. Kuraev, L.N. Lipatov (1975)

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Is Open Access

Parton Distributions of the Proton

, , (2010)

To obtain improved parton densities of the proton, we present a new global analysis of deep inelastic and related data including, in particular, the recent measurements of \(F_2\) at HERA, of the asymmetry of the rapidity distributions of \(W^\pm\) production at the FNAL \(pp\) collider and of the asymmetry in Drell-Yan production in \(pp\) and \(pn\) collisions. We also incorporate data to determine the flavour dependence of the quark sea distributions. We find that the behaviour of the partons at small \(x\) is consistent with the precocious onset of BFKL leading \(\log(1/x)\) dynamics. We discuss the ambiguities remaining in the gluon distribution. We present improved predictions for \(W\) boson (and \(t\) quark) production at the FNAL \(\pp\) collider.