Search for Higgs and Z boson decays to J/$\psi$ or $\Upsilon$ pairs in the four-muon final state in proton-proton collisions at $\sqrt{s} =$ 13 TeV
| Autor: | CMS Collaboration |
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| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Phys. Lett. B 797 (2019) 134811 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1016/j.physletb.2019.134811 |
| Popis: | A search for decays of the Higgs and Z boson to pairs of J/$\psi$ or $\Upsilon$(nS) (n = 1, 2, 3) mesons, with their subsequent decay to $\mu^+\mu^-$ pairs, is presented. The analysis uses data from proton-proton collisions at $\sqrt{s} =$ 13 TeV, collected with the CMS detector at the LHC in 2017 and corresponding to an integrated luminosity of 37.5 fb$^{-1}$. 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/$\psi$ pair channel, the limits are 1.8 $\times$ 10$^{-3}$ and 2.2 $\times$ 10$^{-6}$ for the Higgs and Z boson, respectively, while in the combined $\Upsilon$(nS) pair channel, the limits are 1.4 $\times$ 10$^{-3}$ and 1.5 $\times$ 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. Comment: Replaced with the published version. Added the journal reference. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/HIG-18-025 (CMS Public Pages) |
| Databáze: | arXiv |
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