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https://hdl.handle.net/10316/109103
Título: | Study of the spin and parity of the Higgs boson in Diboson decays with the ATLAS detector | Autor: | Santos, S. P. Amor dos Carvalho, J. Fiolhais, M. C. N. Galhardo, B. Veloso, F. Wolters, H. ATLAS Collaboration |
Data: | 2015 | Editora: | Springer Nature | Título da revista, periódico, livro ou evento: | European Physical Journal C | Volume: | 75 | Número: | 10 | Resumo: | Studies of the spin, parity and tensor couplings of the Higgs boson in the H → ZZ∗ → 4 , H → WW∗ → eνμν and H → γγ decay processes at the LHC are presented. The investigations are based on 25 fb−1 of pp collision data collected by the ATLAS experiment at √ s = 7 TeV and √ s = 8 TeV. The Standard Model (SM) Higgs boson hypothesis, corresponding to the quantum numbers J P = 0+, is tested against several alternative spin scenarios, including non-SM spin-0 and spin-2 models with universal and non-universal couplings to fermions and vector bosons. All tested alternative models are excluded in favour of the SM Higgs boson hypothesis at more than 99.9% confidence level. Using the H → ZZ∗ → 4 and H → WW∗ → eνμν decays, the tensor structure of the interaction between the spin-0 boson and the SM vector bosons is also investigated. The observed distributions of variables sensitive to the non-SM tensor couplings are compatible with the SM predictions and constraints on the non- SM couplings are derived. | URI: | https://hdl.handle.net/10316/109103 | DOI: | 10.1140/epjc/s10052-015-3685-1 | Direitos: | openAccess |
Aparece nas coleções: | FCTUC Física - Artigos em Revistas Internacionais |
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Study-of-the-spin-and-parity-of-the-Higgs-boson-in-Diboson-decays-with-the-ATLAS-detectorEuropean-Physical-Journal-C.pdf | 2.55 MB | Adobe PDF | Ver/Abrir |
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