Please use this identifier to cite or link to this item:
https://hdl.handle.net/10316/109209
Title: | Measurement of the tt¯W and tt¯Z production cross sections in pp collisions at √s = 8 TeV with the ATLAS detector | Authors: | Santos, S. P. Amor dos Carvalho, J. Fiolhais, M. C. N. Galhardo, B. Veloso, F. Wolters, H. ATLAS Collaboration |
Keywords: | Electroweak interaction; Hadron-Hadron scattering; Top physics | Issue Date: | 2015 | Publisher: | Springer Nature | Serial title, monograph or event: | Journal of High Energy Physics | Volume: | 2015 | Issue: | 11 | Abstract: | The production cross sections of top-quark pairs in association with massive vector bosons have been measured using data from pp collisions at √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 tt¯W and tt¯Z processes simultaneously yields a significance of 5.0σ (4.2σ) over the background-only hypothesis for tt¯W (tt¯Z) production. The measured cross sections are (Formula presented.) fb and (Formula presented.) fb. The background-only hypothesis with neither tt¯W nor tt¯Z production is excluded at 7.1σ. All measurements are consistent with next-to-leading-order calculations for the tt¯W and tt¯Z processes. | URI: | https://hdl.handle.net/10316/109209 | DOI: | 10.1007/JHEP11(2015)172 | Rights: | openAccess |
Appears in Collections: | FCTUC Física - Artigos em Revistas Internacionais |
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Measurement-of-the-ttW-and-ttZ-production-cross-sections-in-pp-collisions-at-s--8-TeV-with-the-ATLAS-detectorJournal-of-High-Energy-Physics.pdf | 2.01 MB | Adobe PDF | View/Open |
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