Search for W′→tb¯ in the lepton plus jets final state in proton-proton collisions at a centre-of-mass energy of √s=8 TeV with the ATLAS detector

Open Access
Authors
  • G. Aad
  • [Unknown] et al.
  • R. Aben
  • I. Angelozzi
Publication date 2015
Journal Physics Letters B
Volume | Issue number 743
Pages (from-to) 235-255
Organisations
  • Faculty of Science (FNWI) - Institute of Physics (IoP) - Institute for High Energy Physics (IHEF)
Abstract
A search for new charged massive gauge bosons, called W′, is performed with the ATLAS detector at the LHC, in proton-proton collisions at a centre-of-mass energy of √s=8 TeV, using a dataset corresponding to an integrated luminosity of 20.3 fb−1. This analysis searches for W′ bosons in the W′→tb¯ decay channel in final states with electrons or muons, using a multivariate method based on boosted decision trees. The search covers masses between 0.5 and 3.0 TeV, for right-handed or left-handed W′ bosons. No significant deviation from the Standard Model expectation is observed and limits are set on the W′→tb¯ cross-section times branching ratio and on the W′-boson effective couplings as a function of the W′-boson mass using the CLs procedure. For a left-handed (right-handed) W′ boson, masses below 1.70 (1.92) TeV are excluded at 95% confidence level.
Document type Article
Note ATLAS Collaboration
Language English
Published at https://doi.org/10.1016/j.physletb.2015.02.051
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