Search For Higgs And Zboson Decays To J/?or Ypairs İn The Four-Muon Final State İn Proton-Proton Collisions At ?S=13 Tev


A search for decays of the Higgs and Zboson to pairs of J/?or Y(nS)(n =1, 2, 3) mesons, with their subsequent decay to ?+??pairs, is presented. The analysis uses data from proton-proton collisions at ?s=13 TeV, 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/?pair channel, the limits are 1.8 ×10?3and 2.2 ×10?6for the Higgs and Zboson, respectively, while in the combined Y(nS)pair channel, the limits are 1.4 ×10?3and 1.5 ×10?6, respectively, when the mesons from the Higgs and Zboson 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.


Anahtar Kelimeler

CMS, Standard model physics, Higgs boson, Z boson, Rare decays


WoS Q Değeri


Scopus Q Değeri





Physics Letters B 797(2019)134811