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https://hdl.handle.net/11147/7730
Title: | Measurement of the cross section for top quark pair production in association with a W or Z boson in proton-proton collisions at ?s = 13 TeV | Authors: | CMS Collaboration Karapınar, Güler |
Keywords: | High energy physics Z bosons W boson Top quarks |
Publisher: | Springer | Source: | Sirunyan, A.M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., Brandstetter, J. ...CMS Collaboration (2018). Measurement of the cross section for top quark pair production in association with a W or Z boson in proton-proton collisions at √s = 13 TeV. Journal of High Energy Physics, 2018(8). doi:10.1007/JHEP08(2018)011 | 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(tt¯W)=0.77−0.11+0.12(stat)−0.12+0.13(syst)pb and σ(tt¯Z)=0.99−0.08+0.09(stat)−0.10+0.12(syst)pb. The expected (observed) signal significance for the t t ¯ W production in same-sign dilepton channel is found to be 4.5 (5.3) standard deviations, while for the t t ¯ Z production in three- and 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 t ¯ W and t t ¯ Z production. | URI: | https://doi.org/10.1007/JHEP08(2018)011 https://hdl.handle.net/11147/7730 |
ISSN: | 1029-8479 |
Appears in Collections: | Mathematics / Matematik Rectorate / Rektörlük Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection |
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File | Description | Size | Format | |
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Sirunyan2018_CSFT.pdf | Makale (Article) | 1.55 MB | Adobe PDF | View/Open |
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