Publication
Measurement of the $ t\overline{t}W $ and $ t\overline{t}Z $ production cross sections in pp collisions at $ \sqrt{s}=8 $ TeV with the ATLAS detector
| dc.contributor.author | ATLAS collaboration (2858 authors) | |
| dc.contributor.author | Aguilar-Saavedra, Juan Antonio | |
| dc.contributor.author | Amor Dos Santos, Susana Patricia | |
| dc.contributor.author | Anjos, Nuno | |
| dc.contributor.author | Araque, Juan Pedro | |
| dc.contributor.author | Cantrill, Robert | |
| dc.contributor.author | Carvalho, João | |
| dc.contributor.author | Castro, Nuno Filipe | |
| dc.contributor.author | Conde Muiño, Patricia | |
| dc.contributor.author | Da Cunha Sargedas De Sousa, Mario Jose | |
| dc.contributor.author | Fiolhais, Miguel | |
| dc.contributor.author | Galhardo, Bruno | |
| dc.contributor.author | Gomes, Agostinho | |
| dc.contributor.author | Gonçalo, Ricardo | |
| dc.contributor.author | Jorge, Pedro | |
| dc.contributor.author | Lopes, Lourenco | |
| dc.contributor.author | Machado Miguens, Joana | |
| dc.contributor.author | Maio, Amélia | |
| dc.contributor.author | Maneira, José | |
| dc.contributor.author | Onofre, António | |
| dc.contributor.author | Palma, Alberto | |
| dc.contributor.author | Pedro, Rute | |
| dc.contributor.author | Pina, João Antonio | |
| dc.contributor.author | Santos, Helena | |
| dc.contributor.author | Saraiva, João | |
| dc.contributor.author | Silva, José | |
| dc.contributor.author | Tavares Delgado, Ademar | |
| dc.contributor.author | Veloso, Filipe | |
| dc.contributor.author | Wolters, Helmut | |
| dc.date.accessioned | 2019-02-04T08:09:09Z | |
| dc.date.available | 2019-02-04T08:09:09Z | |
| dc.date.issued | 2015-11-24 | |
| dc.date.updated | 2019-02-04T08:09:09Z | |
| dc.description.abstract | The production cross sections of top-quark pairs in association with massive vector bosons have been measured using data from pp collisions at $ \sqrt{s}=8 $ TeV. The dataset corresponds to an integrated luminosity of 20.3 fb$^{−1}$ collected by the ATLAS detector in 2012 at the LHC. Final states with two, three or four leptons are considered. A fit to the data considering the $ t\overline{t}W $ and $ t\overline{t}Z $ processes simultaneously yields a significance of 5.0σ (4.2σ) over the background-only hypothesis for $ t\overline{t}W $ ( $ t\overline{t}Z $ ) production. The measured cross sections are $ {\sigma}_{t\overline{t}W}={369}_{-91}^{+100} $ fb and $ {\sigma}_{t\overline{t}Z}={176}_{-52}^{+58} $ fb. The background-only hypothesis with neither $ t\overline{t}W $ nor $ t\overline{t}Z $ production is excluded at 7.1σ. All measurements are consistent with next-to-leading-order calculations for the $ t\overline{t}W $ and $ t\overline{t}Z $ processes. | |
| dc.description.version | Peer Reviewed | |
| dc.identifier | JHEP 1511 (2015) 172 JHEP11(2015)172; DOI 10.1007/JHEP11(2015)172 | |
| dc.identifier.uri | http://dx.doi.org/10.1007/JHEP11(2015)172 | |
| dc.identifier.uri | http://hdl.handle.net/10400.26/26935 | |
| dc.language.iso | eng | |
| dc.title | Measurement of the $ t\overline{t}W $ and $ t\overline{t}Z $ production cross sections in pp collisions at $ \sqrt{s}=8 $ TeV with the ATLAS detector | |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| rcaap.rights | openAccess | pt |
| rcaap.type | article |