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Single Top Quark and a W Boson in pp Collisions at √s=8  TeV (CROSBI ID 213453)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Chatrchyan, S. ; ... ; Godinović, Nikola ; Lelas, Damir ; Pleština, Roko ; Polić, Dunja ; Puljak, Ivica ; Antunović, Željko ; Kovač, Marko ; Brigljević, Vuko et al. Single Top Quark and a W Boson in pp Collisions at √s=8  TeV // Physical review letters, 112 (2014), 231802-1-231802-16. doi: 10.1103/PhysRevLett.112.231802

Podaci o odgovornosti

Chatrchyan, S. ; ... ; Godinović, Nikola ; Lelas, Damir ; Pleština, Roko ; Polić, Dunja ; Puljak, Ivica ; Antunović, Željko ; Kovač, Marko ; Brigljević, Vuko ; Đurić, Senka ; Kadija, Krešo ; Luetić, Jelena ; Mekterović, Darko ; Morović, Srećko ; Tikvica, Lucija ; ... ; Swanson, J.

engleski

Single Top Quark and a W Boson in pp Collisions at √s=8  TeV

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.

CMS; Associated Production; Top Quark; W Boson; pp

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Podaci o izdanju

112

2014.

231802-1-231802-16

objavljeno

0031-9007

10.1103/PhysRevLett.112.231802

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Fizika

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