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Search for a new scalar resonance decaying to a pair of Z bosons in proton-proton collisions at √‾s=13 TeV

Search for a new scalar resonance decaying to a pair of Z bosons in proton-proton collisions at √‾s=13 TeV
Search for a new scalar resonance decaying to a pair of Z bosons in proton-proton collisions at √‾s=13 TeV
A search for a new scalar resonance decaying to a pair of Z bosons is performed in the mass range from 130 GeV to 3 TeV, and for various width scenarios. The analysis is based on proton-proton collisions recorded by the CMS experiment at the LHC in 2016, corresponding to an integrated luminosity of 35.9 fb−1 at a center-of-mass energy of 13 TeV. The Z boson pair decays are reconstructed using the 4ℓ, 2ℓ2q, and 2ℓ2ν final states, where ℓ = e or μ. Both gluon fusion and electroweak production of the scalar resonance are considered, with a free parameter describing their relative cross sections. A dedicated categorization of events, based on the kinematic properties of associated jets, and matrix element techniques are employed for an optimal signal and background separation. A description of the interference between signal and background amplitudes for a resonance of an arbitrary width is included. No significant excess of events with respect to the standard model expectation is observed and limits are set on the product of the cross section for a new scalar boson and the branching fraction for its decay to ZZ for a large range of masses and widths.
1029-8479
1-53
Sirunyan, A.M.
846a7137-803d-49de-aae7-d6b85519e829
Tumasyan, A.
6e9fc82d-9104-48e4-8a4d-60f52fdb9ee5
Adam, W.
cf28e097-e876-491a-b325-652e123da3c0
Belyaev, A.
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
The CMS Collaboration
Sirunyan, A.M.
846a7137-803d-49de-aae7-d6b85519e829
Tumasyan, A.
6e9fc82d-9104-48e4-8a4d-60f52fdb9ee5
Adam, W.
cf28e097-e876-491a-b325-652e123da3c0
Belyaev, A.
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3

Sirunyan, A.M., Tumasyan, A. and Adam, W. , The CMS Collaboration (2018) Search for a new scalar resonance decaying to a pair of Z bosons in proton-proton collisions at √‾s=13 TeV. Journal of High Energy Physics, 2018 (127), 1-53. (doi:10.1007/JHEP06(2018)127).

Record type: Article

Abstract

A search for a new scalar resonance decaying to a pair of Z bosons is performed in the mass range from 130 GeV to 3 TeV, and for various width scenarios. The analysis is based on proton-proton collisions recorded by the CMS experiment at the LHC in 2016, corresponding to an integrated luminosity of 35.9 fb−1 at a center-of-mass energy of 13 TeV. The Z boson pair decays are reconstructed using the 4ℓ, 2ℓ2q, and 2ℓ2ν final states, where ℓ = e or μ. Both gluon fusion and electroweak production of the scalar resonance are considered, with a free parameter describing their relative cross sections. A dedicated categorization of events, based on the kinematic properties of associated jets, and matrix element techniques are employed for an optimal signal and background separation. A description of the interference between signal and background amplitudes for a resonance of an arbitrary width is included. No significant excess of events with respect to the standard model expectation is observed and limits are set on the product of the cross section for a new scalar boson and the branching fraction for its decay to ZZ for a large range of masses and widths.

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Accepted/In Press date: 11 June 2018
e-pub ahead of print date: 25 June 2018
Published date: June 2018

Identifiers

Local EPrints ID: 424665
URI: http://eprints.soton.ac.uk/id/eprint/424665
ISSN: 1029-8479
PURE UUID: b829e178-150f-4063-afda-c206dfa74157
ORCID for A. Belyaev: ORCID iD orcid.org/0000-0002-1733-4408

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Date deposited: 05 Oct 2018 11:40
Last modified: 07 Oct 2020 01:53

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Contributors

Author: A.M. Sirunyan
Author: A. Tumasyan
Author: W. Adam
Author: A. Belyaev ORCID iD
Corporate Author: The CMS Collaboration

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