A new approach to multi-jet calculations in hadron collisions

Abstract

We present an algorithm to evaluate the exact, tree-level matrix elements for multi-parton processes in QCD. We tested this technique, based on the recursive evaluation of the S-matrix, on processes such as gg -> n gluons and q qbar -> n gluons, with n up to 9. The summation over colour configurations is designed to allow the construction of parton-level event generators suitable to interfacing with a parton-shower evolution including the effects of colour-coherence. This leads to a fully exclusive, hadron-level description of multi-jet final states, accurately incorporating the dynamics of large jet-jet separation angles. Explicit results for the total rates and differential distributions of processes with 8 final-state partons are given.

17 pages, Latex, 5 figures

References in corpus (7)

• Multi-Parton Amplitudes in Gauge Theories
• Progress in One-Loop QCD Computations
• Weight optimization in multichannel Monte Carlo
• An Algorithm to Compute Born Scattering Amplitudes without Feynman Graphs
• On the computation of multigluon amplitudes
• Four Fermions Productions at a $\gamma \gamma$ Collider
• Calculation of Z Plus Four Jet Production at the Tevatron

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