Rapidity gaps and production of minijets in high-energy hadronic collisions

Multiparton interactions and production of minijets in high energy hadronic collisions.

We discuss the inclusive cross section to produce two minijets with a large separation in rapidity in high energy hadronic collisions. The contribution to the inclusive cross section from the exchange of a BFKL Pomeron is compared with the contribution from the exchange of two BFKL Pomerons, which is induced by the unitarization of the semi-hard interaction. The effect of the multiple exchange ...

Transverse Energy and Minijets in High Energy Collisions

Minijet production and transverse energy are important not only to understand hadronic collisions, but also for the interpretation of nucleus collisions at RHIC and LHC, where it determines the “initial conditions” for the flow in a hadronic soup or a plasma. For high collision energies and small q⊥ (minijets) we enter the BFKL region. This implies that we must take into account off-shell parto...

Minijets and Transverse Energy Flow in High Energy Collisions

We study the distribution of jets and transverse energy flow in high energy hadron-hadron or nucleus-nucleus collisions. In the minijet region correlations and coherence effects can be taken into account in a description, where the parton flux is described by non-integrated structure functions. In a “naive” calculation based on integrated structure functions, the cross section blows up for smal...

Rapidity gaps and jets as a new-physics signature in very-high-energy hadron-hadron collisions.

Probabilities of rapidity gaps in high energy interactions

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 characteristic behaviour of the survival probability of the gap. We incorporate this mechanism in a two-channel eikonal model to make an essentially parameter-free estimate of diffractive dijet production at the Tevatron, given ...