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Title
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Search for Higgs and Z boson decays to J/ or Y pairs in the four-muon final state in proton-proton collisions at =13 TeV
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Author
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Institution/Organisation
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CMS Collaboration
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Abstract
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| A search for decays of the Higgs and Z boson to pairs of J/psi or Y(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 root 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 x 10(-3) and 2.2 x 10(-6) for the Higgs and Z boson, respectively, while in the combined Y(nS) pair channel, the limits are 1.4 x 10(-3) and 1.5 x 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. (C) 2019 The Author(s). Published by Elsevier B.V. |
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Language
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English
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Source (journal)
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Physics letters : B. - Amsterdam, 1967, currens
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Publication
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Amsterdam
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North-Holland
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2019
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ISSN
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0370-2693
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DOI
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10.1016/J.PHYSLETB.2019.134811
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Volume/pages
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797
(2019)
, 22 p.
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Article Reference
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UNSP 134811
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ISI
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000488071200020
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (open access)
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