CMS-PAS-HIG-21-004

CMS-PAS-HIG-21-004
Model-independent search for pair production of new bosons decaying into muons in proton-proton collisions at $ \sqrt{s}= $ 13 TeV
CMS Collaboration
27 March 2024

Abstract: The results of a model-independent search for the pair production of new bosons within a mass range of 0.21 $ < m < $ 60 GeV, are presented. This study utilizes events featuring four muons in the final state and a dataset, comprising 41.5 fb$ ^{-1} $ and 59.7 fb$ ^{-1} $ of proton-proton collisions at $ \sqrt{s}= $ 13 TeV, recorded in 2017 and 2018 by the CMS experiment at the CERN LHC. The study of the 2018 dataset includes a search for displaced signatures of a new boson within the lifetime range of 0 $ < \mathrm{c}\tau < $ 100 mm. The results are combined with a prior CMS result, based on 35.9 fb$ ^{-1} $ of proton-proton collisions at 0 $ < \mathrm{c}\tau < $ 100 mm collected in 2016. No significant deviation from the expected background is observed. Results are presented in terms of a model-independent upper limit on the product of cross section, branching fraction, and acceptance. The findings are interpreted across various benchmark models, such as an axion-like particle model, a vector portal model, the next-to-minimal supersymmetric standard model, and dark SUSY models, including those predicting a non-negligible lifetime of the new boson. In all considered scenarios, substantial portions of the parameter space are excluded, expanding upon prior results.
Links: CDS record (PDF) ; CADI line (restricted) ; These preliminary results are superseded in this paper, Submitted to JHEP. The superseded preliminary plots can be found here.

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