Journal
EUROPEAN PHYSICAL JOURNAL C
Volume 50, Issue 2, Pages 435-466Publisher
SPRINGER
DOI: 10.1140/epjc/s10052-007-0239-1
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In this report we investigate the models employed by PYTHIA and PHOJET Monte Carlo event generators used to describe soft interactions in hadron-hadron collisions. The aim of this study is to predict the important properties of minimum bias and the underlying event at the LHC energy scale. Focusing on a wide range of measurements dominated by soft interactions in proton-proton and proton-anti-proton collisions, one of the aims of this study is to check the consistency of these models when compared to data and evaluate the accuracy of their descriptions of low-p(t) processes. Based on comparisons to a wide range of minimum bias and underlying event data we present a tuning for PYTHIA6.214 and compare it to other PYTHIA tunings. Our proposed tuning for PYTHIA6.214 has been used for the ATLAS Data Challenge productions.
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