Shapes and Forward Jet Production at HERA

Event Shapes and Forward Jet Production at HERA

Forward jet production at HERA

We discuss forward jet production data recently published by the H1 and ZEUS collaborations at HERA. We review how several Monte-Carlo models compare to the data. QCD calculations based on the BFKL formalism and on fixed NLO perturbation theory with and without resolved virtual photons are described. ‡ Invited talk at the Ringberg Workshop New Trends in HERA Physics 1999, Ringberg Castle, Teger...

Forward jet production at HERA

Forward jet and particle cross sections have been measured in lepton-proton collisions by the H1 and ZEUS collaborations at HERA. Parton evolution schemes are tested by requiring a forward jet or particle with E T ∼ Q 2 or a forward jet plus a central dijet system. The measurements are compared to next-to-leading order QCD predictions and various QCD-based Monte Carlo models.

Forward Jet Production at HERA in the Low x Regimein Next - to - Leading

The production of forward jets of transverse momentum p T (j) Q and large momentum fraction x jet x probes the onset of BFKL dynamics at HERA. A full O(2 s) calculation of the inclusive forward jet cross section is presented and compared to the expected BFKL cross section. The kinematical region populated by these events and the scale dependence of the xed order perturbative QCD cross sections ...

Deep inelastic events containing two forward jets at HERA

We use the BFKL equation to calculate the rate of deep inelastic scattering events containing two forward jets (adjacent to the proton remnants) at HERA. We compare the production of two forward jets with that of only one forward jet (the “Mueller” process). We obtain a stable prediction for this two to one jet ratio, which may serve as a measure of the BFKL vertex function.