Search for New Resonance Production in the Z \(\gamma \) \(\rightarrow \) \(ll\gamma \) Final State at  \(\sqrt{s}\) = 13 TeV Using the CMS Detector at the LHC

A search for a new Spin-0 scalar particle decaying to Z \(\gamma \) , with the Z boson further decaying to pairs of electrons or muons is presented. The analysis is based on a data set of proton-proton (pp) collisions at \(\sqrt{s}\) = 13 TeV, corresponding to an integrated luminosity of 35.9 fb \(^{-1}\) collected with the CMS detector at the LHC in 2016 during Run-2. The analysis extracts the background directly from data, through an unbinned likelihood fit. The results discussed are from combined leptonic channels of previous published studies interpreted in terms of upper limits on the production cross section of narrow and broad spin-0 resonances for scalar masses between 300 GeV ( \(\mu ^{+}\mu ^{-}\) \(\gamma \) channel) or 350 GeV ( \(e^{+}e^{-}\) \(\gamma \) channel) and 4 TeV.