Sirunyan, AM;
Tumasyan, A;
Adam, W;
Ambrogi, F;
Asilar, E;
Bergauer, T;
Brandstetter, J;
... Woods, N; + view all
(2018)
Measurement of the cross section for top quark pair production in association with a W or Z boson in proton-proton collisions at root s=13 TeV.
Journal of High Energy Physics
, 2018
(8)
, Article 11. 10.1007/JHEP08(2018)011.
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Abstract
A measurement is performed of the cross section of top quark pair production in association with a W or Z boson using proton-proton collisions at a center-of-mass energy of 13 TeV at the LHC. The data sample corresponds to an integrated luminosity of 35.9 fb−1 , collected by the CMS experiment in 2016. The measurement is performed in the same-sign dilepton, three- and four-lepton final states. The production cross sections are measured to be σ(t¯tW) = 0.77+0.12 −0.11(stat)+0.13 −0.12(syst) pb and σ(t¯tZ) = 0.99+0.09 −0.08(stat)+0.12 −0.10(syst) pb. The expected (observed) signal significance for the t¯tW production in same-sign dilepton channel is found to be 4.5 (5.3) standard deviations, while for the t¯tZ production in threeand four-lepton channels both the expected and the observed significances are found to be in excess of 5 standard deviations. The results are in agreement with the standard model predictions and are used to constrain the Wilson coefficients for eight dimension-six operators describing new interactions that would modify t¯tW and t¯tZ production.
| Type: | Article |
|---|---|
| Title: | Measurement of the cross section for top quark pair production in association with a W or Z boson in proton-proton collisions at root s=13 TeV |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1007/JHEP08(2018)011 |
| Publisher version: | https://doi.org/110.1007/JHEP08(2018)011 |
| Language: | English |
| Additional information: | This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited. https://creativecommons.org/licenses/by/4.0/ |
| Keywords: | Hadron-Hadron scattering (experiments), Top physics |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10097453 |
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