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Search for ZZ resonances in the 2ℓ2ν final state in proton-proton collisions at 13 TeV

Search for ZZ resonances in the 2ℓ2ν final state in proton-proton collisions at 13 TeV
Search for ZZ resonances in the 2ℓ2ν final state in proton-proton collisions at 13 TeV
A search for heavy resonances decaying to a pair of Z bosons is performed using data collected with the CMS detector at the LHC. Events are selected by requiring two oppositely charged leptons (electrons or muons), consistent with the decay of a Z boson, and large missing transverse momentum, which is interpreted as arising from the decay of a second Z boson to two neutrinos. The analysis uses data from proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb−1. The hypothesis of a spin-2 bulk graviton (X) decaying to a pair of Z bosons is examined for 600 ≤ mX ≤ 2500 GeV and upper limits at 95% confidence level are set on the product of the production cross section and branching fraction of X → ZZ ranging from 100 to 4 fb. For bulk graviton models characterized by a curvature scale parameter k~=0.5k~=0.5 in the extra dimension, the region mX < 800 GeV is excluded, providing the most stringent limit reported to date. Variations of the model considering the possibility of a wide resonance produced exclusively via gluon-gluon fusion or qq¯¯¯qq¯ annihilation are also examined.
1029-8479
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
The CMS Collaboration
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3

Belyaev, Alexander , The CMS Collaboration (2018) Search for ZZ resonances in the 2ℓ2ν final state in proton-proton collisions at 13 TeV. Journal of High Energy Physics, 2018, [003]. (doi:10.1007/JHEP03(2018)003).

Record type: Article

Abstract

A search for heavy resonances decaying to a pair of Z bosons is performed using data collected with the CMS detector at the LHC. Events are selected by requiring two oppositely charged leptons (electrons or muons), consistent with the decay of a Z boson, and large missing transverse momentum, which is interpreted as arising from the decay of a second Z boson to two neutrinos. The analysis uses data from proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb−1. The hypothesis of a spin-2 bulk graviton (X) decaying to a pair of Z bosons is examined for 600 ≤ mX ≤ 2500 GeV and upper limits at 95% confidence level are set on the product of the production cross section and branching fraction of X → ZZ ranging from 100 to 4 fb. For bulk graviton models characterized by a curvature scale parameter k~=0.5k~=0.5 in the extra dimension, the region mX < 800 GeV is excluded, providing the most stringent limit reported to date. Variations of the model considering the possibility of a wide resonance produced exclusively via gluon-gluon fusion or qq¯¯¯qq¯ annihilation are also examined.

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10.1007%2FJHEP03(2018)003 - Version of Record
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Accepted/In Press date: 20 February 2018
e-pub ahead of print date: 5 March 2018

Identifiers

Local EPrints ID: 418948
URI: http://eprints.soton.ac.uk/id/eprint/418948
ISSN: 1029-8479
PURE UUID: b2018ca4-2492-4d6e-b9f1-456680ee2f09
ORCID for Alexander Belyaev: ORCID iD orcid.org/0000-0002-1733-4408

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Date deposited: 27 Mar 2018 16:30
Last modified: 17 Dec 2019 01:44

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