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

2015-10-06Journal article Open access
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dc.contributor.authorATLAS collaboration (2842 authors)
dc.contributor.authorAguilar-Saavedra, Juan Antonio
dc.contributor.authorAmor Dos Santos, Susana Patricia
dc.contributor.authorAnjos, Nuno
dc.contributor.authorAraque, Juan Pedro
dc.contributor.authorCantrill, Robert
dc.contributor.authorCarvalho, João
dc.contributor.authorCastro, Nuno Filipe
dc.contributor.authorConde Muiño, Patricia
dc.contributor.authorDa Cunha Sargedas De Sousa, Mario Jose
dc.contributor.authorFiolhais, Miguel
dc.contributor.authorGalhardo, Bruno
dc.contributor.authorGomes, Agostinho
dc.contributor.authorGonçalo, Ricardo
dc.contributor.authorJorge, Pedro
dc.contributor.authorLopes, Lourenco
dc.contributor.authorMachado Miguens, Joana
dc.contributor.authorMaio, Amélia
dc.contributor.authorManeira, José
dc.contributor.authorOnofre, António
dc.contributor.authorPalma, Alberto
dc.contributor.authorPedro, Rute
dc.contributor.authorPina, João Antonio
dc.contributor.authorPinto, Belmiro
dc.contributor.authorSantos, Helena
dc.contributor.authorSaraiva, João
dc.contributor.authorSilva, José
dc.contributor.authorTavares Delgado, Ademar
dc.contributor.authorVeloso, Filipe
dc.contributor.authorWolters, Helmut
dc.date.accessioned2019-02-04T07:09:09Z
dc.date.available2019-02-04T07:09:09Z
dc.date.issued2015-10-06
dc.date.updated2019-02-04T07:09:09Z
dc.description.abstractStudies of the spin, parity and tensor couplings of the Higgs boson in the $H \rightarrow ZZ^{*} \rightarrow 4 \ell $ , $H \rightarrow WW^{*} \rightarrow e \nu \mu \nu $ and $H \rightarrow \gamma \gamma $ decay processes at the LHC are presented. The investigations are based on $25\,\mathrm{fb}^{-1}$ of pp collision data collected by the ATLAS experiment at $\sqrt{s}=7$  TeV and $\sqrt{s}=8$  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 \rightarrow ZZ^{*} \rightarrow 4 \ell $ and $H \rightarrow WW^{*} \rightarrow 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.
dc.description.versionPeer Reviewed
dc.identifierEur.Phys.J. C76 (2016) 152; DOI 10.1140/epjc/s10052-015-3685-1, 10.1140/epjc/s10052-016-3934-y
dc.identifier.urihttp://dx.doi.org/10.1140/epjc/s10052-015-3685-1, 10.1140/epjc/s10052-016-3934-y
dc.identifier.urihttp://hdl.handle.net/10400.26/26863
dc.language.isoeng
dc.titleStudy of the spin and parity of the Higgs boson in diboson decays with the ATLAS detector
dc.typejournal article
dspace.entity.typePublication
rcaap.rightsopenAccesspt
rcaap.typearticle

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