2000/02/29 by D0 Collaboration, B. Abbott, M. Abolins +98 · 46 citations
Mathematics · Physics and Astronomy · #Combinatorics #High-Energy Particle Collisions Research #Materials science #Mathematics #Particle physics #Particle physics theoretical and experimental studies #Physics #Production (economics) #Quantum Chromodynamics and Particle Interactions #Spin (aerodynamics) #Standard Model (mathematical formulation) #Thermodynamics #hep-ex
paper · pdf · doi:10.1103/physrevlett.85.256
published in Physical Review Letters 85(2), 256-261 (American Physical Society) · Submitted to PRL, Added references, minor changes to text
arxiv created 2000/05/11 · openalex publication_date 2000/07/10 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The D0 collaboration has performed a study of spin correlation in tt production for the process tt\ensuremath→bW+bW^\ensuremath-, where the W bosons decay to e\ensuremathν or \ensuremathμ\ensuremathν. A sample of six events was collected during an exposure of the D0 detector to an integrated luminosity of approximately 125pb^\ensuremath-1 of √(s)\phantom\rule0ex0ex=\phantom\rule0ex0ex1.8TeV pp collisions. The standard model (SM) predicts that the short lifetime of the top quark ensures the transmission of any spin information at production to the tt decay products. The degree of spin correlation is characterized by a correlation coefficient \ensuremathκ. We find that \ensuremathκ>\ensuremath-0.25 at the 68% confidence level, in agreement with the SM prediction of \ensuremathκ\phantom\rule0ex0ex=\phantom\rule0ex0ex0.88.