Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-05-07
JHEP0810:113,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
25 pages. Discussion and references expanded; results unchanged. Additional calculations included
Scientific paper
10.1088/1126-6708/2008/10/113
We investigate parton-branching methods based on transverse-momentum dependent (TMD) parton distributions and matrix elements for the Monte Carlo simulation of multi-particle final states at high-energy colliders. We observe that recently measured angular correlations in ep final states with multiple hadronic jets probe QCD coherence effects in the space-like branching, associated with finite-angle gluon radiation from partons carrying small longitudinal momenta, and not included in standard shower generators. We present Monte Carlo calculations for azimuthal two-jet and three-jet distributions, for jet multiplicities and for correlations in the transverse-momentum imbalance between the leading jets. We discuss comparisons with current experimental multi-jet data, and implications of corrections to collinear-ordered showers for LHC final states.
Hautmann Francesco
Jung Haemyeong
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