Search for Higgs boson and observation of Z boson through their decay into a charm quark-antiquark pair in boosted topologies in proton-proton collisions at $\sqrt{s}$ = 13 TeV

Abstract

A search for the standard model (SM) Higgs boson (H) produced with transverse momentum greater than 450 GeV and decaying to a charm quark-antiquark ($\mathrm{c}\bar{\mathrm{c}}$) pair is presented. The search is performed using proton-proton collision data collected at $\sqrt{s}$ = 13 TeV by the CMS experiment at the LHC, corresponding to an integrated luminosity of 138 fb${}^{-1}$. Boosted H $\to$ $\mathrm{c}\bar{\mathrm{c}}$ decay products are reconstructed as a single large-radius jet and identified using a deep neural network charm tagging technique. The method is validated by measuring the Z $\to$ $\mathrm{c}\bar{\mathrm{c}}$ decay process, which is observed in association with jets at high $p_{\mathrm{T}}$ for the first time with a signal strength of 1.00 ${}_{-0.14}^{+0.17}$ (syst) $\pm$ 0.08 (theo) $\pm$ 0.06 (stat), defined as the ratio of the observed process rate to the standard model expectation. The observed (expected) upper limit on $\sigma$(H) $\mathcal{B}$(H $\to$ $\mathrm{c}\bar{\mathrm{c}}$) is set at 47 (39) times the SM prediction at 95% confidence level.

arXiv commentReplaced 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/HIG-21-012 (CMS Public Pages)

References in corpus (66)

• 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
• The anti-k_t jet clustering algorithm
• An Introduction to PYTHIA 8.2
• FastJet user manual
• Asymptotic formulae for likelihood-based tests of new physics
• A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX
• A New Method for Combining NLO QCD with Shower Monte Carlo Algorithms
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• Parton distributions for the LHC Run II
• Confidence Level Computation for Combining Searches with Small Statistics
• Parton distributions from high-precision collider data
• Explaining NonLinear Classification Decisions with Deep Taylor Decomposition
• A Positive-Weight Next-to-Leading-Order Monte Carlo for Heavy Flavour Hadroproduction
• 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
• Identifying Boosted Objects with N-subjettiness
• The CMS trigger system
• Soft Drop
• Single-top Wt-channel production matched with parton showers using the POWHEG method
• Merging meets matching in MC@NLO
• Description and performance of track and primary-vertex reconstruction with the CMS tracker
• Observation of a new boson with mass near 125 GeV in pp collisions at sqrt(s) = 7 and 8 TeV
• Event generator tunes obtained from underlying event and multiparton scattering measurements
• MCFM for the Tevatron and the LHC
• 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 the CMS muon detector and muon reconstruction with proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Towards an understanding of jet substructure
• Extraction and validation of a new set of CMS PYTHIA8 tunes from underlying-event measurements
• Energy Correlation Functions for Jet Substructure
• NLO Higgs boson production via vector-boson fusion matched with shower in POWHEG
• Pileup Per Particle Identification
• Observation of Higgs boson production in association with a top quark pair at the LHC with the ATLAS detector
• Observation of Higgs boson decay to bottom quarks
• Performance of the CMS Level-1 trigger in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Precision luminosity measurement in proton-proton collisions at $\sqrt{s}=$ 13 TeV in 2015 and 2016 at CMS
• Observation of $H\to b\bar{b}$ decays and $VH$ production with the ATLAS detector
• Electron and photon reconstruction and identification with the CMS experiment at the CERN LHC
• Higgs production via gluon fusion in the POWHEG approach in the SM and in the MSSM
• Performance of missing transverse momentum reconstruction in proton-proton collisions at $\sqrt{s}=$ 13 TeV using the CMS detector
• Higgs boson production in association with top quarks in the POWHEG BOX
• Single-top t-channel hadroproduction in the four-flavour scheme with POWHEG and aMC@NLO
• Merging H/W/Z + 0 and 1 jet at NLO with no merging scale: a path to parton shower + NNLO matching
• Observation of $\mathrm{t}\overline{\mathrm{t}}$H production
• Observation of the Higgs boson decay to a pair of tau leptons with the CMS detector
• HW/HZ + 0 and 1 jet at NLO with the POWHEG BOX interfaced to GoSam and their merging within MiNLO
• New Angles on Energy Correlation Functions
• Performance of reconstruction and identification of $\tau$ leptons decaying to hadrons and ${\nu }_{\tau }$ in pp collisions at $\sqrt{s}=$ 13 TeV
• Evidence for Higgs boson decay to a pair of muons
• NLO QCD+EW predictions for V+jets including off-shell vector-boson decays and multijet merging
• Precise predictions for V+jets dark matter backgrounds
• A search for the dimuon decay of the Standard Model Higgs boson with the ATLAS detector
• Inclusive search for a highly boosted Higgs boson decaying to a bottom quark-antiquark pair
• Thinking outside the ROCs: Designing Decorrelated Taggers (DDT) for jet substructure
• Search for the Decay of the Higgs Boson to Charm Quarks with the ATLAS Experiment
• A measurement of soft-drop jet observables in $pp$ collisions with the ATLAS detector at $\sqrt{s}=13$ TeV
• Performance of the reconstruction and identification of high-momentum muons in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Search for the Higgs boson decaying to two muons in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• A search for the standard model Higgs boson decaying to charm quarks
• Search for the Dimuon Decay of the Higgs Boson in $pp$ Collisions at $\sqrt{s}$ = 13 TeV with the ATLAS Detector
• Direct constraint on the Higgs-charm coupling from a search for Higgs boson decays into charm quarks with the ATLAS detector
• Measurements of Higgs boson production cross-sections in the $H\to {\tau }^{+}{\tau }^{-}$ decay channel in $pp$ collisions at $\sqrt{s}=13\text{TeV}$ with the ATLAS detector
• Inclusive search for highly boosted Higgs bosons decaying to bottom quark-antiquark pairs in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Measurement of the Z boson differential production cross section using its invisible decay mode (Z $\to$ $\nu \bar{\nu }$) in proton-proton collisions at $\sqrt{s}=$ 13 TeV

Cited by in corpus (4)

• Machine Learning in High Energy Physics: A review of heavy-flavor jet tagging at the LHC
• Performance of heavy-flavour jet identification in Lorentz-boosted topologies in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Simultaneous probe of the charm and bottom quark Yukawa couplings using $\mathrm{t}\bar{\mathrm{t}}$H events
• Search for rare decays of the Z and Higgs bosons to a J/$\psi$ or $\psi$(2S) meson and a photon in proton-proton collisions at $\sqrt{s}$ = 13 TeV