Study of the spin and parity of the Higgs boson in Diboson decays with the ATLAS detector

ATLAS Collaboration

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

183 Citas (Scopus)

Resumen

Studies of the spin, parity and tensor couplings of the Higgs boson in the H → ZZ∗ → 4ℓ, 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 JP = 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 → 4ℓ 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.

Idioma originalInglés
Número de artículo476
PublicaciónEuropean Physical Journal C
Volumen75
N.º10
DOI
EstadoPublicada - 2015
Publicado de forma externa

Huella

Profundice en los temas de investigación de 'Study of the spin and parity of the Higgs boson in Diboson decays with the ATLAS detector'. En conjunto forman una huella única.

Citar esto