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

Aad, G.

doi: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

Journal Article · Tue Oct 06 00:00:00 UTC 2015 · European Physical Journal. C, Particles and Fields

DOI: https://doi.org/10.1140/epjc/s10052-015-3685-1 · OSTI ID:1224458

Aad, G. ^[1]

Aix-Marseille Univ. and CNRS/IN2P3, Marseille (France). et al.

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 25fb^–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. Thus, 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.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC); USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)

Contributing Organization:: ATLAS Collaboration

Grant/Contract Number:: AC02-05CH11231; AC02-06CH11357; AC02-98CH10886; AC03-76SF00515; SC0012704

OSTI ID:: 1224458

Journal Information:: European Physical Journal. C, Particles and Fields, Journal Name: European Physical Journal. C, Particles and Fields Journal Issue: 10 Vol. 75; ISSN 1434-6044

Publisher:: SpringerCopyright Statement

Country of Publication:: United States

Language:: English

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Pair production processes and flavor in gauge-invariant perturbation theory Egger, Larissa; Maas, Axel; Sondenheimer, René arXiv https://doi.org/10.48550/arxiv.1701.02881	text	January 2017
Resummation ambiguities in the Higgs transverse-momentum spectrum in the Standard Model and beyond E., Bagnaschi,; V., Harlander, R.; H., Mantler, Springer https://doi.org/10.5167/uzh-121822	text	January 2016
Resummation ambiguities in the Higgs transverse-momentum spectrum in the Standard Model and beyond Bagnaschi, E.; Harlander, R. V.; Mantler, H. Karlsruhe https://doi.org/10.5445/ir/1000054002	text	January 2016
Gauge-independent renormalization of the 2-Higgs-doublet model Krause, M.; Lorenz, R.; Mühlleitner, M. Karlsruhe https://doi.org/10.5445/ir/1000060305	text	January 2016
Strong first order electroweak phase transition in the CP-conserving 2HDM revisited Basler, P.; Krause, M.; Mühlleitner, M. Karlsruhe https://doi.org/10.5445/ir/1000067551	text	January 2017
The N2HDM under theoretical and experimental scrutiny Mühlleitner, Margarete; Sampaio, M. O. P.; Santos, R. Karlsruhe https://doi.org/10.5445/ir/1000069037	text	January 2017
Phenomenological comparison of models with extended Higgs sectors Mühlleitner, Margarete; Sampaio, Marco O. P.; Santos, Rui Karlsruhe https://doi.org/10.5445/ir/1000077316	text	January 2017
Phenomenological comparison of models with extended Higgs sectors Mühlleitner, Margarete; Sampaio, Marco O. P.; Santos, Rui Karlsruhe https://doi.org/10.5445/ir/1000077316#verlagsausgabe	text	January 2017
The CP-violating 2HDM in light of a strong first order electroweak phase transition and implications for Higgs pair production Basler, P.; Mühlleitner, M.; Wittbrodt, J. Karlsruhe https://doi.org/10.5445/ir/1000081623	text	January 2018

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