Evidence for electroweak production of four charged leptons and two jets in proton-proton collisions at $\sqrt{s}=$ 13 TeV

Abstract

Evidence is presented for the electroweak (EW) production of two jets (jj) in association with two Z bosons and constraints on anomalous quartic gauge couplings are set. The analysis is based on a data sample of proton-proton collisions at $\sqrt{s}=$ 13 TeV collected with the CMS detector in 2016-2018, and corresponding to an integrated luminosity of 137 fb${}^{-1}$. The search is performed in the fully leptonic final state ZZ $\to$ $\ell \ell {\ell }^{\prime }{\ell }^{\prime }$, where $\ell ,{\ell }^{\prime }=$ e, $\mu$. The EW production of two jets in association with two Z bosons is measured with an observed (expected) significance of 4.0 (3.5) standard deviations. The cross sections for the EW production are measured in three fiducial volumes and the result is ${\sigma }_{\mathrm{EW}}$(pp $\to$ ZZjj $\to$ $\ell \ell {\ell }^{\prime }{\ell }^{\prime }$jj) = 0.33 ${}_{-0.10}^{+0.11}$ (stat) ${}_{-0.03}^{+0.04}$ (syst) fb in the most inclusive volume, in agreement with the standard model prediction of 0.275 $\pm$ 0.021 fb. Measurements of total cross sections for jj production in association with two Z bosons are also reported. Limits on anomalous quartic gauge couplings are derived in terms of the effective field theory operators T0, T1, T2, T8, and T9.

Replaced with the published version. Added the journal reference. All the figures and tables, including additional supplementary figures, can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/SMP-20-001 (CMS Public Pages)

References in corpus (17)

• 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
• An Introduction to PYTHIA 8.2
• Comparative study of various algorithms for the merging of parton showers and matrix elements in hadronic collisions
• Particle-flow reconstruction and global event description with the CMS detector
• Pileup subtraction using jet areas
• The CMS trigger system
• Automatic spin-entangled decays of heavy resonances in Monte Carlo simulations
• MCFM for the Tevatron and the LHC
• Jet energy scale and resolution in the CMS experiment in pp collisions at 8 TeV
• Performance of electron reconstruction and selection with the CMS detector in proton-proton collisions at sqrt(s) = 8 TeV
• QCD radiation in the production of heavy colored particles at the LHC
• Measurements of properties of the Higgs boson decaying into the four-lepton final state in pp collisions at sqrt(s) = 13 TeV
• p p -> j j e+/- mu+/- nu nu and j j e+/- mu-/+ nu nu at O(α_{em}^6) and O(α_{em}^4 α_s^2) for the Study of the Quartic Electroweak Gauge Boson Vertex at LHC
• Measurements of production cross sections of WZ and same-sign WW boson pairs in association with two jets in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Measurement of vector boson scattering and constraints on anomalous quartic couplings from events with four leptons and two jets in proton-proton collisions at sqrt(s) = 13 TeV
• PHANTOM: a Monte Carlo event generator for six parton final states at high energy colliders

Cited by in corpus (25)

• SMEFT analysis of vector boson scattering and diboson data from the LHC Run II
• Nonresonant Searches for Axion-Like Particles in Vector Boson Scattering Processes at the LHC
• Vector-Boson Scattering at the LHC: unravelling the Electroweak sector
• Vector Boson Scattering Processes: Status and Prospects
• A sensitivity study of VBS and diboson WW to dimension-6 EFT operators at the LHC
• Searching for anomalous quartic gauge couplings at muon colliders using principle component analysis
• Tri-photon at muon collider: a new process to probe the anomalous quartic gauge couplings
• Extract the energy scale of anomalous $\gamma \gamma \to W^{+}{W}^{-}$ scattering in the vector boson scattering process using artificial neural networks
• NLO QCD and EW corrections to vector-boson scattering into ${\mathrm{W}}^{+}{\mathrm{W}}^{-}$ at the LHC
• Using k-means assistant event selection strategy to study anomalous quartic gauge couplings at muon colliders
• Effective field theory versus UV-complete model: vector boson scattering as a case study
• Detect anomalous quartic gauge couplings at muon colliders with quantum kernel k-means
• Optimize the event selection strategy to study the anomalous quartic gauge couplings at muon colliders using the support vector machine and quantum support vector machine
• NLO electroweak and QCD corrections to the production of a photon with three charged lepton plus missing energy at the LHC
• Phenomenology of a Born-Infeld extension of the $U(1{)}_{\mathrm{Y}}$ sector at lepton colliders
• Longitudinally polarized ZZ scattering at the Muon Collider
• Positively Identifying HEFT or SMEFT
• Search for Neutral Triple Gauge Couplings with $ZZ$ Production at Future Electron Positron Colliders
• Search for anomalous quartic gauge couplings in the process ${\mu }^{+}{\mu }^{-}\to \bar{\nu }\nu \gamma \gamma$ with a nested local outlier factor
• Anomalous production of massive gauge boson pairs at muon colliders
• Expected sensitivity on the anomalous quartic neutral gauge couplings in $\gamma \gamma$ collisions at the CLIC
• Sensitivity to longitudinal vector boson scattering in semileptonic final states at the HL-LHC
• Evidence of ZZ$\gamma$ production and observation of $4\ell \gamma$ in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Constraints on Anomalous Quartic Gauge Couplings via Electroweak Production of $\gamma \gamma jj$ at Future Proton-Proton Colliders
• Cosmology with a Non-minimally Coupled Dark Matter Fluid I. Background Evolution