Search for Z$\gamma$ resonances using leptonic and hadronic final states in proton-proton collisions at $\sqrt{s}=$ 13 TeV

Abstract

A search is presented for resonances decaying to a Z boson and a photon. The analysis is based on data from proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb${}^{-1}$, and collected with the CMS detector at the LHC in 2016. Two decay modes of the Z boson are investigated. In the leptonic channels, the Z boson candidates are reconstructed using electron or muon pairs. In the hadronic channels, they are identified using a large-radius jet, containing either light-quark or b quark decay products of the Z boson, via jet substructure and advanced b quark tagging techniques. The results from these channels are combined and interpreted in terms of upper limits on the product of the production cross section and the branching fraction to Z$\gamma$ for narrow and broad spin-0 resonances with masses between 0.35 and 4.0 TeV, providing thereby the most stringent limits on such resonances.

Replaced with the published version. Added the journal reference and the DOI. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/EXO-17-005 (CMS Public Pages)

References in corpus (34)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Particle-flow reconstruction and global event description with the CMS detector
• Tuning PYTHIA 8.1: the Monash 2013 Tune
• Pileup subtraction using jet areas
• The CMS trigger system
• Description and performance of track and primary-vertex reconstruction with the CMS tracker
• Performance of CMS muon reconstruction in pp collision events at sqrt(s) = 7 TeV
• Jet energy scale and resolution in the CMS experiment in pp collisions at 8 TeV
• Identification of heavy-flavour jets with the CMS detector in pp collisions at 13 TeV
• Performance of electron reconstruction and selection with the CMS detector in proton-proton collisions at sqrt(s) = 8 TeV
• Performance of the CMS muon detector and muon reconstruction with proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Techniques for improved heavy particle searches with jet substructure
• Search for massive resonances in dijet systems containing jets tagged as W or Z boson decays in pp collisions at sqrt(s) = 8 TeV
• Search for massive resonances decaying into pairs of boosted bosons in semi-leptonic final states at sqrt(s) = 8 TeV
• Identification techniques for highly boosted W bosons that decay into hadrons
• Search for heavy resonances decaying into $WW$ in the $e\nu \mu \nu$ final state in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Low-Scale Technicolor at the Tevatron and LHC
• Studies of Boosted Decision Trees for MiniBooNE Particle Identification
• Search for $WW/WZ$ resonance production in $\ell \nu qq$ final states in $pp$ collisions at $\sqrt{s}=$ 13 TeV with the ATLAS detector
• Searches for the $Z\gamma$ decay mode of the Higgs boson and for new high-mass resonances in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Search for diboson resonances with boson-tagged jets in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Search for heavy resonances decaying to a $W$ or $Z$ boson and a Higgs boson in the $q{\bar{q}}^{(\prime )}b\bar{b}$ final state in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Search for heavy resonances that decay into a vector boson and a Higgs boson in hadronic final states at sqrt(s) = 13 TeV
• Search for heavy resonances decaying to a $Z$ boson and a photon in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Search for heavy resonances decaying into a vector boson and a Higgs boson in final states with charged leptons, neutrinos, and b quarks
• Search for new resonances decaying to a $W$ or $Z$ boson and a Higgs boson in the ${\ell }^{+}{\ell }^{-}b\bar{b}$, $\ell \nu b\bar{b}$, and $\nu \bar{\nu }b\bar{b}$ channels with $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Search for a scalar or vector particle decaying into Zgamma in ppbar collisions at sqrt(s) = 1.96 TeV
• Multi-Photon Signals from Composite Models at LHC
• Signals of single particle production at the earliest LHC
• Z boson decay to photon plus Kaluza-Klein graviton in large extra dimensions
• Search for high-mass Z-gamma resonances in e+e-gamma and mu+mu-gamma final states in proton-proton collisions at sqrt(s) = 8 and 13 TeV
• Search for diboson resonances in the 2$\ell$2$\nu$ final state in proton-proton collisions at 13 TeV

Cited by in corpus (21)

• Jet Substructure at the Large Hadron Collider: Experimental Review
• Non-Resonant Searches for Axion-Like Particles at the LHC
• Light scalars in composite Higgs models
• The experimental status of direct searches for exotic physics beyond the standard model at the Large Hadron Collider
• Global fits in the Georgi-Machacek model
• Mass Unspecific Supervised Tagging (MUST) for boosted jets
• Higgs decay into a lepton pair and a photon revisited
• MUSiC: a model-unspecific search for new physics in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Measurement of the $Z(\to {\ell }^{+}{\ell }^{-})\gamma$ production cross-section in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Classification of anomaly-free 2HDMs with a gauged U(1)' symmetry
• Search for heavy resonances decaying to a photon and a hadronically decaying $Z/W/H$ boson in $pp$ collisions at $\sqrt{s}=13$ $\mathrm{TeV}$ with the ATLAS detector
• Beyond the Standard Model Effective Field Theory: The Singlet Extended Standard Model
• Updated constraints on Georgi-Machacek model, and its electroweak phase transition and associated gravitational waves
• Updated global fit of the aligned two-Higgs-doublet model with heavy scalars
• UV Completed Composite Higgs model with heavy composite partners
• Indications for extra scalars at LHC? -- BSM physics at future $e^{+}{e}^{-}$ colliders
• Search for narrow H$\gamma$ resonances in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Varying gauge couplings and collider phenomenology
• Connection between diphoton and triboson channels in new physics searches
• General one-loop formulas for $H\to f\bar{f}\gamma$ and its applications
• NNLO QCD predictions of the asymmetry probe of the $Z\gamma$ pair-production process