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Spin Correlation in tt-bar Production from pp-bar Collisions at sqrt(s)=1.8 TeV

Collaboration, D; Abbott, B; (2000) Spin Correlation in tt-bar Production from pp-bar Collisions at sqrt(s)=1.8 TeV. Physical Review Letters , 85 (2) 256 - 261. 10.1103/PhysRevLett.85.256. Green open access

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Abstract

The D0 collaboration has performed a study of spin correlation in tt-bar production for the process tt-bar to bb-bar W^+W^-, where the W bosons decay to e-nu or mu-nu. A sample of six events was collected during an exposure of the D0 detector to an integrated luminosity of approximately 125 pb^-1 of sqrt{s}=1.8 TeV pp-bar 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-bar decay products. The degree of spin correlation is characterized by a correlation coefficient k. We find that k>-0.25 at the 68% confidence level, in agreement with the SM prediction of k=0.88.

Type: Article
Title: Spin Correlation in tt-bar Production from pp-bar Collisions at sqrt(s)=1.8 TeV
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.85.256
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.85.256
Language: English
Additional information: © 2000 The American Physical Society. Submitted to PRL, Added references, minor changes to text
URI: https://discovery.ucl.ac.uk/id/eprint/1374203
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