BFKL-type generators for minimum-bias collisions and forward-physics at the LHC

by Leif Lonnblad (Lund University)

Thursday 9 Jun 2011, 11:00 → 12:00 Europe/Zurich

4/2-011 - TH common room (CERN)

I will give a presentation of a new model for simulating exclusive final states in minimum-bias collisions between hadrons. In a series of papers a Monte Carlo model has been developed based on Mueller's dipole picture of BFKL-evolution, supplemented with non-leading corrections, which has shown to be very successful in describing inclusive and semi-inclusive observables in hadron collisions. I will discuss a further extension of this model to also describe exclusive final states. This is a highly non-trivial extension, for which no guidance from perturbative QCD could be found. Hence many choices had to be made based on semi-classical and phenomenological arguments. The end result is a new event generator called DIPSY, which can be used to simulate complete minimum-bias non-diffractive hadronic collision events. Although the description of data from the Tevatron and LHC is not quite as good as for PYTHIA, the new results are clearly competitive, and can be expected to improve with careful tuning. In addition, as the model is very different from conventional multiple scattering scenaria, the DIPSY program can be used to gain deeper insight in the soft and semi-hard processes involved both in hadronic and heavy ion collisions.

Paper

• http://arxiv.org/abs/arXiv:0807.0325
• http://arxiv.org/abs/arXiv:1103.4320
• http://arxiv.org/abs/arXiv:1103.4321