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 |