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

Aad, G.
•
Abbott, B.
•
Abdallah, J.
altro
GIORDANI, Mario
2015
  • journal article

Periodico
THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS
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.
DOI
10.1140/epjc/s10052-015-3685-1
WOS
WOS:000366310400001
Archivio
http://hdl.handle.net/11390/1096663
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84947594156
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84947594156&partnerID=40&md5=928da15a9ae574749c1c7b3f70af70a0
Diritti
metadata only access
Scopus© citazioni
161
Data di acquisizione
Jun 2, 2022
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Web of Science© citazioni
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Data di acquisizione
Mar 4, 2024
Visualizzazioni
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Data di acquisizione
Apr 19, 2024
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