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# Observation of the Associated Production of a Single Top Quark and a W Boson in pp Collisions at √s=8  TeV

Chatrchyan, S. , The CMS Collaboration (2014) Observation of the Associated Production of a Single Top Quark and a W Boson in pp Collisions at √s=8  TeV. Physical Review Letters, 112 (23), [231802].

Record type: Article

## 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??fb?1 of proton-proton collisions at 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 tt¯ 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

Published date: 9 June 2014
Organisations: Physics & Astronomy

## Identifiers

Local EPrints ID: 369469
URI: http://eprints.soton.ac.uk/id/eprint/369469
ORCID for Alexander Belyaev: orcid.org/0000-0002-1733-4408

## Catalogue record

Date deposited: 26 Sep 2014 14:50

## Contributors

Author: S. Chatrchyan
Author: V. Khachatryan
Author: A.M. Sirunyan
Corporate Author: The CMS Collaboration