We review the application of perturbative QCD to diffractive processes. We introduce the two-
gluon exchange model to describe diffractive and production in deep inelastic scattering. We …

We reconsider the calculation of a non-global QCD observable and find the possible
breakdown of QCD coherence. This breakdown arises as a result of wide angle soft gluon …

We report on the absolute antiproton flux and the antiproton to proton ratio in the energy
range 0.62–3.19 GeV at the top of the atmosphere, measured by the balloon-borne …

We show that high energy hadronic reactions which contain a rapidity gap and a hard
subprocess have a specific dependence on the kinematic variables, which results in a …

A measurement of the jet activity in t̄t events produced in proton–proton collisions at a
centre-of-mass energy of 7 TeV is presented, using 2.05 fb− 1 of integrated luminosity …

Additional jet activity in dijet events is measured using pp pp collisions at ATLAS at a centre-
of-mass energy of 7\, TeV 7 TeV, for jets reconstructed using the anti-k_t anti-kt algorithm …

Multifragmentation of a “fused system” was observed for central collisions between 32
MeV/nucleon 129 Xe and nat Sn. Most of the resulting charged products were well identified …

A measurement of jet activity in the rapidity interval bounded by a dijet system is presented.
Events are vetoed if a jet with transverse momentum greater than 20 GeV is found between …

A model for the production of large rapidity gaps being implemented in the Monte Carlo
event generator PHOJET is discussed. In this model, high-mass diffraction dissociation …

Small-x phenomenology – Summary of the 3rd Lund small-x workshop in 2004 | The European
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