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https://hdl.handle.net/10316/109103
Title: | Study of the spin and parity of the Higgs boson in Diboson decays with the ATLAS detector | Authors: | Santos, S. P. Amor dos Carvalho, J. Fiolhais, M. C. N. Galhardo, B. Veloso, F. Wolters, H. ATLAS Collaboration |
Issue Date: | 2015 | Publisher: | Springer Nature | Serial title, monograph or event: | European Physical Journal C | Volume: | 75 | Issue: | 10 | Abstract: | 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 | Rights: | openAccess |
Appears in Collections: | FCTUC Física - Artigos em Revistas Internacionais |
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