Multi-jet merging with NLO matrix elements
Frank Siegert, Stefan Hoeche, Frank Krauss, Marek Schonherr
TL;DR
This paper introduces a novel method combining ME+PS merging with NLO accuracy using POWHEG, improving the precision of simulated multi-jet events across various collider processes.
Contribution
It presents a new algorithm that merges tree-level matrix elements with NLO corrections within the parton shower framework, implemented in Sherpa.
Findings
Enhanced accuracy in multi-jet event simulations.
Successful application to multiple collider processes.
Improved agreement with experimental data.
Abstract
In the algorithm presented here, the ME+PS approach to merge samples of tree-level matrix elements into inclusive event samples is combined with the POWHEG method, which includes exact next-to-leading order matrix elements in the parton shower. The advantages of the method are discussed and the quality of its implementation in Sherpa is exemplified by results for e+e- annihilation into hadrons at LEP, for deep-inelastic lepton-nucleon scattering at HERA, for Drell-Yan lepton-pair production at the Tevatron and for W+W- production at LHC energies.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · High-Energy Particle Collisions Research · Quantum Chromodynamics and Particle Interactions