Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/9683
Title: Study of the spin and parity of the Higgs boson in diboson decays with the ATLAS detector
Authors: Aad, G.
Abbott, B.
Abdallah, J.
Abdinov, O.
Aben, R.
Abolins, M.
Adye, T.
Issue Date: 2015
Publisher: Springer
Abstract: Studies of the spin, parity and tensor couplings of the Higgs boson in the H -> ZZ* -> 4l, H -> WW* -> e nu mu nu and H -> gamma gamma 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 root s = 7 TeV and root 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* -> 4l and H -> WW* -> e nu mu nu. 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://doi.org/10.1140/epjc/s10052-015-3685-1
https://hdl.handle.net/20.500.11851/9683
ISSN: 1434-6044
1434-6052
Appears in Collections:PubMed İndeksli Yayınlar Koleksiyonu / PubMed Indexed Publications Collection
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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