Friday, July 19, 2013

1307.5015 (Michael H. Seymour et al.)

Constraining MPI models using sigma_effective and recent Tevatron and
LHC Underlying Event data

Michael H. Seymour, Andrzej Siodmok
We review the modelling of multiple interactions in the event generator Herwig++ and study implications of recent tuning efforts to Tevatron and LHC data. It is often said that measurements of the effective cross section for double-parton scattering, sigma_effective, are in contradiction with models of the final state of multi-parton interactions, but we show that the Herwig++ model is consistent with both and gives stable predictions for underlying event observables at 14 TeV.
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