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https://hdl.handle.net/1822/39959
Título: | Search for W′→tb→qqbb Decays in pp Collisions at s√ = 8 TeV with the ATLAS Detector |
Autor(es): | Onofre, A. Castro, Nuno Filipe Silva Fernandes ATLAS Collaboration |
Palavras-chave: | Exotics |
Data: | 2015 |
Editora: | Springer Verlag |
Revista: | The European Physical Journal C: Particles and Fields |
Citação: | Aad, G., Abbott, B., Abdallah, J., Khalek, S. A., Abdinov, O., Aben, R., . . . Collaboration, A. (2015). Search for W ' -> tb -> qqbb decays in pp collisions at root s=8 TeV with the ATLAS detector. European Physical Journal C, 75(4). doi: 10.1140/epjc/s10052-015-3372-2 |
Resumo(s): | A search for a massive W′ gauge boson is performed with the ATLAS detector at the LHC in pp collisions at a centre-of-mass energy of s√ = 8 TeV, corresponding to 20.3 fb−1 of integrated luminosity. This analysis is done in the W′→tb→qqbb mode for W′ masses above 1.5 TeV, where the W′ decay products are highly boosted. Novel jet substructure techniques are used to identify jets from high-momentum top quarks to ensure high sensitivity, independent of W′ mass, up to 3 TeV; b-tagging is also used to identify jets originating from b-quarks. The data are consistent with Standard Model background-only expectations, and upper limits at 95% confidence level are set on the W′→tb cross section times branching ratio ranging from 0.16 pb to 0.33 pb for left-handed W′ bosons, and ranging from 0.10 pb to 0.21 pb for W′ bosons with purely right-handed couplings. Upper limits at 95% confidence level are set on the W′-boson coupling to tb as a function of the W′ mass using an effective field theory approach, which is independent of details of particular models predicting a W′ boson. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/39959 |
DOI: | 10.1140/epjc/s10052-015-3372-2 |
ISSN: | 1434-6044 1434-6052 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | LIP - Artigos/papers |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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ATLAS-20140806.pdf | 2,22 MB | Adobe PDF | Ver/Abrir |