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

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Study of the spin and parity of the Higgs boson in diboson decays with the ATLAS detector	2 MB	Adobe Acrobat PDF	Read	Download
DOI Доступ к ресурсу на сайте издателя			10.1140/epjc/s10052-015-3685-1

Title: Study of the spin and parity of the Higgs boson in diboson decays with the ATLAS detector
Creator: Aad, G.
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Abdallah, J.
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Chelkov, G. A.
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Abbott, B.
Contributor: Томский государственный университет Радиофизический факультет Научные подразделения РФФ
Date: 2015
DOI: 10.1140/epjc/s10052-015-3685-1
Description: Studies of the spin, parity and tensor couplingsof 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, сorresponding 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.

Created: 26-02-2016

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