2010/06/30 by Mathieu Rubin, Gavin P. Salam, Sebastian Sapeta · 1 citation
Physics and Astronomy · #Hadron #High-Energy Particle Collisions Research #Jet (fluid) #Large Hadron Collider #Lepton #Nuclear physics #Observable #Order (exchange) #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #Unitarity #hep-ph
paper · pdf · doi:10.1007/jhep09(2010)084
published as JHEP 1009:084,2010 · 38 pages, 13 figures; v2 includes additional references
arxiv created 2010/07/03 · openalex publication_date 2010/09/01 · arxiv updated 2014/11/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Hadronic observables in Z+ jet events can be subject to large NLO corrections at TeV scales, with K-factors that even reach values of order 50 in some cases. We develop a method, LoopSim, by which approximate NNLO predictions can be obtained for such observables, supplementing NLO Z+ jet and NLO Z+ 2-jet results with a unitarity-based approximation for missing higher loop terms. We first test the method against known NNLO results for Drell-Yan lepton p t spectra. We then show our approximate NNLO results for the Z+ jet observables. Finally we examine whether the LoopSim method can provide useful information even in cases without giant K-factors, with results for observables in dijet events that can be compared to early LHC data.