dc.contributor.author Sirunyan, A. M. dc.contributor.author Sanders, Stephen J. dc.contributor.author CMS Collaboration dc.date.accessioned 2021-01-08T19:54:35Z dc.date.available 2021-01-08T19:54:35Z dc.date.issued 2019-01-30 dc.identifier.citation Sirunyan, A.M., Tumasyan, A., Adam, W. et al. Search for rare decays of Z and Higgs bosons to J/𝜓 and a photon in proton-proton collisions at 𝑠√ = 13TeV. Eur. Phys. J. C 79, 94 (2019). https://doi.org/10.1140/epjc/s10052-019-6562-5 en_US dc.identifier.uri http://hdl.handle.net/1808/31071 dc.description This work is licensed under a Creative Commons Attribution 4.0 International License. en_US dc.description.abstract A search is presented for decays of Z and Higgs bosons to a J/𝜓 meson and a photon, with the subsequent decay of the J/𝜓 to 𝜇+𝜇−. The analysis uses data from proton-proton collisions with an integrated luminosity of 35.9fb−1 at 𝑠√=13TeV collected with the CMS detector at the LHC. The observed limit on the Z→J/𝜓𝛾 decay branching fraction, assuming that the J/𝜓 meson is produced unpolarized, is 1.4×10−6 at 95% confidence level, which corresponds to a rate higher than expected in the standard model by a factor of 15. For extreme-polarization scenarios, the observed limit changes from −13.6 to +8.6% with respect to the unpolarized scenario. The observed upper limit on the branching fraction for H→J/𝜓𝛾 where the J/𝜓 meson is assumed to be transversely polarized is 7.6×10−4, a factor of 260 larger than the standard model prediction. The results for the Higgs boson are combined with previous data from proton-proton collisions at 𝑠√=8TeV to produce an observed upper limit on the branching fraction for H→J/𝜓𝛾 that is a factor of 220 larger than the standard model value. en_US dc.publisher SpringerOpen en_US dc.rights © CERN for the benefit of the CMS collaboration 2019. en_US dc.rights.uri http://creativecommons.org/licenses/by/4.0/ en_US dc.title Search for rare decays of Z and Higgs bosons to J/𝜓 and a photon in proton-proton collisions at 𝑠√ = 13TeV en_US dc.type Article en_US kusw.kuauthor Sanders, Stephen J. kusw.kudepartment Physics and Astronomy en_US dc.identifier.doi 10.1140/epjc/s10052-019-6562-5 en_US kusw.oaversion Scholarly/refereed, publisher version en_US kusw.oapolicy This item meets KU Open Access policy criteria. en_US dc.rights.accessrights openAccess en_US
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