Evidence for spin correlation in t Ì
t production.
Phys Rev Lett
; 108(3): 032004, 2012 Jan 20.
Article
em En
| MEDLINE
| ID: mdl-22400731
ABSTRACT
We present a measurement of the ratio of events with correlated t and t Ì
t spins to the total number of t Ì
t events. This ratio f is evaluated using a matrix-element-based approach in 729 t Ì
t candidate events with a single lepton â (electron or muon) and at least four jets. The analyzed p Ì
p collisions data correspond to an integrated luminosity of 5.3 fb(-1) and were collected with the D0 detector at the Fermilab Tevatron collider operating at a center-of-mass energy âs=1.96 TeV. Combining this result with a recent measurement of f in dileptonic final states, we find f in agreement with the standard model. In addition, the combination provides evidence for the presence of spin correlation in t Ì
t events with a significance of more than 3 standard deviations.
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Base de dados:
MEDLINE
Idioma:
En
Revista:
Phys Rev Lett
Ano de publicação:
2012
Tipo de documento:
Article