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Measurement of the tt¯W and tt¯Z production cross sections in pp collisions at vs = 8 TeV with the ATLAS detector

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posted on 2023-06-09, 01:47 authored by Benedict AllbrookeBenedict Allbrooke, Lily AsquithLily Asquith, Alessandro CerriAlessandro Cerri, C A Chavez Barajas, Antonella De SantoAntonella De Santo, C T Potter, Fabrizio SalvatoreFabrizio Salvatore, I Santoyo Castillo, K Suruliz, Mark SuttonMark Sutton, Iacopo Vivarelli, The ATLAS Collaboration
The production cross sections of top-quark pairs in association with massive vector bosons have been measured using data from pp collisions at sv = 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 5.0s (4.2s) over the background-only hypothesis for tt¯Wtt¯W (tt¯Z) production. The measured cross sections are stt¯W = 369 + 100-91 fb and stt¯Z = 176 + 58-52 fb. The background-only hypothesis with neither tt¯W nor tt¯Z production is excluded at 7.1s. All measurements are consistent with next-to-leading-order calculations for the tt¯W and tt¯Z processes.

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Publication status

  • Published

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  • Published version

Journal

Journal of High Energy Physics

ISSN

1029-8479

Publisher

Springer Verlag

Volume

172

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2016-06-21

First Open Access (FOA) Date

2016-06-21

First Compliant Deposit (FCD) Date

2016-06-20

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