Search for diboson resonances in the semileptonic $\mathrm{X}\rightarrow\mathrm{Z}\mathrm{V}\rightarrow\ell^+\ell^-~\mathrm{q\bar{q}}$ final state at $\sqrt{s} = 13~\mathrm{TeV}$ with CMS

A search for diboson resonances is performed in the semileptonic $\mathrm{X}\rightarrow\mathrm{Z}\mathrm{V}\rightarrow\ell^+\ell^-~\mathrm{q\bar{q}}$ final state, where one vector boson decays hadronically ($\mathrm{V} = \mathrm{W}, \mathrm{Z}$) and the other, a Z boson, decays into two leptons, in the mass range $550 \le m_\mathrm{ZV} \le 2500~\mathrm{GeV}$. In this regime the $\mathrm{V}$ boson may be sufficiently boosted that its decay products are contained in a single jet, thus merged jet reconstruction and substructure techniques are utilised. The case where the hadronic decay products are resolved is also considered at low mass. At high signal masses the closeness of the leptons is taken into account to avoid leptonic Z reconstruction inefficiencies. The analysis exploits the kinematic and flavour information of the final state particles of the event in order to isolate the hypothetical signal. The results are based on the analysis of proton-proton collision data collected by CMS in 2015, corresponding to an integrated luminosity of $2.7~\mathrm{fb}^{-1}$ delivered by the LHC at center-of-mass energy of $13~\mathrm{TeV}$.