2012/11/30 by M. Wobisch, K. Chakravarthula, R. Dhullipudi +2 · 8 citations
Physics and Astronomy · #Azimuth #High-Energy Particle Collisions Research #Large Hadron Collider #Momentum (technical analysis) #Monte Carlo method #Particle physics theoretical and experimental studies #Parton #Quantum Chromodynamics and Particle Interactions #Rapidity #Tevatron #Transverse plane #hep-ex #hep-ph
paper · pdf · doi:10.1007/jhep01(2013)172
published in Journal of High Energy Physics 2013(1) (Springer Nature) · 20 pages, 11 figures, 1 table, submitted to JHEP
arxiv created 2012/11/30 · openalex publication_date 2012/12/29 · openalex created_date 2016/06/24 · arxiv updated 2021/12/01 · openalex updated_date 2026/08/05
We introduce a new measurable quantity, RΔϕ, for studies of the rapidity and transverse momentum dependence of dijet azimuthal decorrelations in hadron-hadron collisions. In pQCD, RΔϕ is computed as a ratio of three-jet and dijet cross sections in which the parton distribution functions cancel to a large extent. At the leading order, RΔϕ is proportional to αs, and the transverse momentum dependence of can therefore be exploited to determine αs. We compute the NLO pQCD theory predictions and non-perturbative corrections for RΔϕ at the LHC and the Tevatron and investigate the corresponding uncertainties. From this, we estimate the theory uncertainties for αs determinations based on RΔϕ at both colliders. The potential of RΔϕ measurements for tuning Monte Carlo event generators is also demonstrated.