2014/11/26 by Kelly Beernaert, Beernaert, Kelly
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.48550/arxiv.1411.7203
4 pages, 6 figures, Proceedings of TOP2014, 7th International Workshop on Top Quark Physics, Cannes, France, September 29 - October 3 2014
arxiv created 2014/11/26 · openalex publication_date 2014/11/26 · arxiv updated 2014/11/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We present an overview of the measurements of tt spin correlations in the CMS Collaboration. We present two analyses both in the dilepton channel using proton-proton collisions at √(s) = 7 TeV based on an integrated luminosity of 5.0 fb-1. The spin correlations and polarization are measured using angular asymmetries. The results are consistent with unpolarized top quarks and Standard Model spin correlation. The second analysis sets a limit on the real part of the top-quark chromo-magnetic dipole moment of -0.043 < Re(μt) < 0.117 at 95 % confidence level through the measured azimuthal angle difference between the two charged leptons from tt production.