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′ → t b bar 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′ → t b bar 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.

Aad, G., Abbott, B., Abdallah, J., Abdel Khalek, S., Abdinov, O., Aben, R., et al. (2015). Search for W ' -> t(b)over-bar in the lepton plus jets final state in proton-proton collisions at a centre-of-mass energy of root s=8 TeV with the ATLAS detector. PHYSICS LETTERS. SECTION B, 743, 235-255 [10.1016/j.physletb.2015.02.051].

Search for W ' -> t(b)over-bar in the lepton plus jets final state in proton-proton collisions at a centre-of-mass energy of root s=8 TeV with the ATLAS detector

F. Ceradini;B. Di Micco;R. Di Nardo;D. Orestano;F. Petrucci;D. Puddu;G. Salamanna;C. Taccini;M. Trovatelli;
2015-01-01

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′ → t b bar 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′ → t b bar 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.
2015
Aad, G., Abbott, B., Abdallah, J., Abdel Khalek, S., Abdinov, O., Aben, R., et al. (2015). Search for W ' -> t(b)over-bar in the lepton plus jets final state in proton-proton collisions at a centre-of-mass energy of root s=8 TeV with the ATLAS detector. PHYSICS LETTERS. SECTION B, 743, 235-255 [10.1016/j.physletb.2015.02.051].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/118855
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