# Spin correlation in $t\overline{t}$ production from $p\overline{p}$ collisions at $\sqrt{s} = 1.8 TeV$

Abstract : he 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.
Keywords :
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00005600
Contributor : Lpsc Bibliotheque <>
Submitted on : Monday, July 17, 2000 - 3:01:32 PM
Last modification on : Monday, March 29, 2021 - 3:22:08 PM
Long-term archiving on: : Monday, June 21, 2010 - 4:21:10 PM

### Identifiers

• HAL Id : in2p3-00005600, version 1

### Citation

B. Abbott, M. Abolins, V. Abramov, B.S. Acharya, D.L. Adams, et al.. Spin correlation in $t\overline{t}$ production from $p\overline{p}$ collisions at $\sqrt{s} = 1.8 TeV$. Physical Review Letters, American Physical Society, 2000, 85, pp.256-261. ⟨in2p3-00005600⟩

Record views