Search for a new resonance decaying into two spin-0bosons in a final state with two photons and two bottomquarks in proton-proton collisions at √s = 13 TeV
Search for a new resonance decaying into two spin-0bosons in a final state with two photons and two bottomquarks in proton-proton collisions at √s = 13 TeV
A search for a new boson X is presented using CERN LHC proton-proton collision data collected by the CMS experiment at s√ = 13 TeV in 2016-2018, and corresponding to an integrated luminosity of 138 fb−1. The resonance X decays into either a pair of Higgs bosons HH of mass 125 GeV or an H and a new spin-0 boson Y. One H subsequently decays to a pair of photons, and the second H or Y, to a pair of bottom quarks. The explored mass ranges of X are 260-1000 GeV and 300-1000 GeV, for decays to HH and to HY, respectively, with the Y mass range being 90-800 GeV. For a spin-0 X hypothesis, the 95% confidence level upper limit on the product of its production cross section and decay branching fraction is observed to be within 0.90-0.04 fb, depending on the masses of X and Y. The largest deviation from the background-only hypothesis with a local (global) significance of 3.8 (2.8) standard deviations is observed for X and Y masses of 650 and 90 GeV, respectively. The limits are interpreted using several models of new physics.
hep-ex
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
[Unknown type: UNSPECIFIED]
Abstract
A search for a new boson X is presented using CERN LHC proton-proton collision data collected by the CMS experiment at s√ = 13 TeV in 2016-2018, and corresponding to an integrated luminosity of 138 fb−1. The resonance X decays into either a pair of Higgs bosons HH of mass 125 GeV or an H and a new spin-0 boson Y. One H subsequently decays to a pair of photons, and the second H or Y, to a pair of bottom quarks. The explored mass ranges of X are 260-1000 GeV and 300-1000 GeV, for decays to HH and to HY, respectively, with the Y mass range being 90-800 GeV. For a spin-0 X hypothesis, the 95% confidence level upper limit on the product of its production cross section and decay branching fraction is observed to be within 0.90-0.04 fb, depending on the masses of X and Y. The largest deviation from the background-only hypothesis with a local (global) significance of 3.8 (2.8) standard deviations is observed for X and Y masses of 650 and 90 GeV, respectively. The limits are interpreted using several models of new physics.
Text
2310.01643v1
- Author's Original
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Accepted/In Press date: 2 October 2023
Additional Information:
Submitted to the Journal of High Energy Physics. All figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/HIG-21-011 (CMS Public Pages)
Keywords:
hep-ex
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Local EPrints ID: 483316
URI: http://eprints.soton.ac.uk/id/eprint/483316
PURE UUID: 35c5d7fb-80fc-4138-8155-8053986f261a
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Date deposited: 27 Oct 2023 16:57
Last modified: 18 Mar 2024 03:06
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Corporate Author: The CMS Collaboration
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