2012/09/30 by Christian Groß, Christian Gross, Gustavo Marques Tavares +2 · 27 citations
Physics and Astronomy · #Asymmetry #Branching fraction #High-Energy Particle Collisions Research #Large Hadron Collider #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Quantum Chromodynamics and Particle Interactions #Sigma #Tevatron #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevd.87.014004
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 87(1) (American Physical Society) · 35 pages, 15 figures; references added
arxiv created 2012/10/17 · openalex publication_date 2013/01/02 · arxiv updated 2013/05/29 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The tt asymmetry measured at the Tevatron continues to disagree with Standard Model predictions at the 3 sigma level. We update the status of the phenomenological light axigluon model in explaining the asymmetry data, taking into account constraints from the charge asymmetry at the LHC and the tt cross section at both the Tevatron and LHC. We find that an axigluon with a mass between 100 and 400 GeV provides an excellent fit to the data. Recent searches by ATLAS and CMS for pair production of heavy resonances which decay to dijets rule out axigluons with large branching fractions to dijets. However, axigluons which predominantly decay to multijets via intermediate resonances are still a possibility. We outline four distinct scenarios which cover the most important decay topologies and discuss how one might exclude or discover axigluons as multijet resonances at the LHC. MadGraph implementations for each of the scenarios are provided.