Sirunyan, AM;
Tumasyan, A;
Adam, W;
Ambrogi, F;
Bergauer, T;
Brandstetter, J;
Dragicevic, M;
... Woods, N; + view all
(2019)
Search for Higgs and Z boson decays to J/ψ or Y pairs in the four-muon final state in proton-proton collisions at \sqrt{s} = 13TeV.
Physics Letters B
, 797
, Article 134811. 10.1016/j.physletb.2019.134811.
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Abstract
A search for decays of the Higgs and Z boson to pairs of J/ψ or Y(nS) (n = 1, 2, 3) mesons, with their subsequent decay to μ^{+}μ^{−} pairs, is presented. The analysis uses data from proton-proton collisions at \sqrt{s} = 13TeV, collected with the CMS detector at the LHC in 2017 and corresponding to an integrated luminosity of 37.5fb^{−1}. While an observation of such a decay with this sample would indicate the presence of physics beyond the standard model, no significant excess is observed. Upper limits at 95% confidence level are placed on the branching fractions of these decays. In the J/ψ pair channel, the limits are 1.8×10^{−3} and 2.2×10^{−6} for the Higgs and Z boson, respectively, while in the combined Y(nS) pair channel, the limits are 1.4×10^{−3} and 1.5×10^{−6}, respectively, when the mesons from the Higgs and Z boson decay are assumed to be unpolarized. When fully longitudinal and transverse polarizations are considered the limits reduce by about 22–29% and increase by about 10–13%, respectively.
| Type: | Article |
|---|---|
| Title: | Search for Higgs and Z boson decays to J/ψ or Y pairs in the four-muon final state in proton-proton collisions at \sqrt{s} = 13TeV |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.physletb.2019.134811 |
| Publisher version: | https://doi.org/10.1016/j.physletb.2019.134811 |
| Language: | English |
| Additional information: | © 2019 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
| Keywords: | CMS, Standard model physics, Higgs boson, Z boson, Rare decays |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10089616 |
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