Observation of the associated production of a single top quark and a W boson in pp collisions at sqrt(s) = 8 TeV - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Physical Review Letters Year : 2014

Observation of the associated production of a single top quark and a W boson in pp collisions at sqrt(s) = 8 TeV

S. Chatrchyan
  • Function : Author
P. Busson
R. Granier de Cassagnac
C. Mironov
P. Paganini
J.-L. Agram
C. Collard
E. Conte
P. van Hove
D. Contardo
M. Gouzevitch
M. Lethuillier
V. Sordini
P. Verdier
S. Viret

Abstract

The first observation of the associated production of a single top quark and a W boson is presented. The analysis is based on a data set corresponding to an integrated luminosity of 12.2 inverse femtobarns of proton-proton collisions at sqrt(s) = 8 TeV recorded by the CMS experiment at the LHC. Events with two leptons and a jet originating from a b quark are selected. A multivariate analysis based on kinematic and topological properties is used to separate the signal from the dominant t t-bar background. An excess consistent with the signal hypothesis is observed, with a significance which corresponds to 6.1 standard deviations above a background-only hypothesis. The measured production cross section is 23.4 +/- 5.4 pb, in agreement with the standard model prediction.

Dates and versions

in2p3-00929819 , version 1 (14-01-2014)

Identifiers

Cite

S. Chatrchyan, S. Baffioni, F. Beaudette, P. Busson, C. Charlot, et al.. Observation of the associated production of a single top quark and a W boson in pp collisions at sqrt(s) = 8 TeV. Physical Review Letters, 2014, 112, pp.231802. ⟨10.1103/PhysRevLett.112.231802⟩. ⟨in2p3-00929819⟩
45 View
0 Download

Altmetric

Share

Gmail Facebook X LinkedIn More