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
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¯ dec...
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Veröffentlicht in: | Physics letters. B 2015-01, Vol.743 (235), p.235-255 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | 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. |
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ISSN: | 0370-2693 1873-2445 |
DOI: | 10.1016/j.physletb.2015.02.051 |