Determination of the width of the top quark.
Phys Rev Lett
; 106(2): 022001, 2011 Jan 14.
Article
em En
| MEDLINE
| ID: mdl-21405220
ABSTRACT
We extract the total width of the top quark, Γ(t), from the partial decay width Γ(t â Wb) measured using the t-channel cross section for single top-quark production and from the branching fraction B(t â Wb) measured in tt events using up to 2.3 fb(-1) of integrated luminosity collected by the D0 Collaboration at the Tevatron pp Collider. The result is Γ(t) = 1.99(-0.55)(+0.69) GeV, which translates to a top-quark lifetime of τ(t) = (3.3(-0.9)(+1.3)) × 10(-25) s. Assuming a high mass fourth generation b' quark and unitarity of the four-generation quark-mixing matrix, we set the first upper limit on |V(tb')| < 0.63 at 95% C.L.
Buscar no Google
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Ano de publicação:
2011
Tipo de documento:
Article