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

ATLAS Collaboration

doi:10.1140/epjc/s10052-015-3685-1

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

ATLAS Collaboration

iThemba Labs
Department of Physics
University of South Africa
Cadi Ayyad University
Moroccan Foundation for Advanced Science Innovation and Research (MAScIR)
Dep Física and CEFITEC of Faculdade de Ciências e Tecnologia
NOVA University Lisbon
CERN
Aix-Marseille Université
University of Oklahoma
Academia Sinica - Institute of Physics
Azerbaijan National Academy of Sciences
University of Amsterdam
Michigan State University
University of Toronto
Tel Aviv University
Technion-Israel Institute of Technology
University of Oregon
Stockholm University
Oskar Klein Centre
National Institute for Nuclear Physics
Abdus Salam International Centre for Theoretical Physics
King's College London
AGH University of Krakow
United States Department of Energy
Northern Illinois University
Ludwig Maximilian University of Munich
Rutherford Appleton Laboratory
University of Liverpool
University of Belgrade
University of Göttingen
University of Lisbon
University of Granada
Boston University
Joint Institute for Nuclear Research
University of Rome Tor Vergata
Lund University
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
University of Bologna
University of Victoria BC
Université Grenoble Alpes
Universidad Nacional de La Plata
Horia Hulubei National Institute of Physics and Nuclear Engineering
National Technical University of Athens
The University of Chicago
Columbia University
University of Birmingham
University of Naples Federico II

Research output: Contribution to journal › Article › peer-review

173 Scopus citations

Abstract

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 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, 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^∗ → 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.

Original language	English
Article number	476
Journal	European Physical Journal C
Volume	75
Issue number	10
DOIs	https://doi.org/10.1140/epjc/s10052-015-3685-1
State	Published - 2015

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@article{7c62adeb4c0948e28cf3d2cdcc790388,

title = "Study of the spin and parity of the Higgs boson in Diboson decays with the ATLAS detector",

abstract = "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 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, 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. 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.",

author = "\{ATLAS Collaboration\} and G. Aad and B. Abbott and J. Abdallah and O. Abdinov and R. Aben and M. Abolins and Abouzeid, \{O. S.\} and H. Abramowicz and H. Abreu and R. Abreu and Y. Abulaiti and Acharya, \{B. S.\} and L. Adamczyk and Adams, \{D. L.\} and J. Adelman and S. Adomeit and T. Adye and Affolder, \{A. A.\} and T. Agatonovic-Jovin and J. Agricola and Aguilar-Saavedra, \{J. A.\} and Ahlen, \{S. P.\} and F. Ahmadov and G. Aielli and H. Akerstedt and \{A. {\AA}kesson\}, \{T. P.\} and Akimov, \{A. V.\} and Alberghi, \{G. L.\} and J. Albert and S. Albrand and Verzini, \{M. J.Alconada\} and M. Aleksa and Aleksandrov, \{I. N.\} and C. Alexa and G. Alexander and T. Alexopoulos and M. Alhroob and G. Alimonti and L. Alio and J. Alison and Alkire, \{S. P.\} and Allbrooke, \{B. M.M.\} and Allport, \{P. P.\} and A. Aloisio and H. Arnold and V. Dao and J. Hobbs and J. Jia and G. Piacquadio and D. Tsybychev",

note = "Publisher Copyright: {\textcopyright} CERN for the benefit of the ATLAS collaboration 2015.",

year = "2015",

doi = "10.1140/epjc/s10052-015-3685-1",

language = "English",

volume = "75",

journal = "European Physical Journal C",

issn = "1434-6044",

number = "10",

}

TY - JOUR

T1 - Study of the spin and parity of the Higgs boson in Diboson decays with the ATLAS detector

AU - ATLAS Collaboration

AU - Aad, G.

AU - Abbott, B.

AU - Abdallah, J.

AU - Abdinov, O.

AU - Aben, R.

AU - Abolins, M.

AU - Abouzeid, O. S.

AU - Abramowicz, H.

AU - Abreu, H.

AU - Abreu, R.

AU - Abulaiti, Y.

AU - Acharya, B. S.

AU - Adamczyk, L.

AU - Adams, D. L.

AU - Adelman, J.

AU - Adomeit, S.

AU - Adye, T.

AU - Affolder, A. A.

AU - Agatonovic-Jovin, T.

AU - Agricola, J.

AU - Aguilar-Saavedra, J. A.

AU - Ahlen, S. P.

AU - Ahmadov, F.

AU - Aielli, G.

AU - Akerstedt, H.

AU - A. Åkesson, T. P.

AU - Akimov, A. V.

AU - Alberghi, G. L.

AU - Albert, J.

AU - Albrand, S.

AU - Verzini, M. J.Alconada

AU - Aleksa, M.

AU - Aleksandrov, I. N.

AU - Alexa, C.

AU - Alexander, G.

AU - Alexopoulos, T.

AU - Alhroob, M.

AU - Alimonti, G.

AU - Alio, L.

AU - Alison, J.

AU - Alkire, S. P.

AU - Allbrooke, B. M.M.

AU - Allport, P. P.

AU - Aloisio, A.

AU - Arnold, H.

AU - Dao, V.

AU - Hobbs, J.

AU - Jia, J.

AU - Piacquadio, G.

AU - Tsybychev, D.

PY - 2015

Y1 - 2015

N2 - 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 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, 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. 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.

AB - 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 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, 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. 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.

UR - https://www.scopus.com/pages/publications/105026920835

U2 - 10.1140/epjc/s10052-015-3685-1

DO - 10.1140/epjc/s10052-015-3685-1

M3 - Article

AN - SCOPUS:105026920835

SN - 1434-6044

VL - 75

JO - European Physical Journal C

JF - European Physical Journal C

IS - 10

M1 - 476

ER -

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

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