Search for flavor-changing neutral current interactions of the top quark and Higgs boson in final states with two photons in proton-proton collisions at $\sqrt{s}=$ 13 TeV

Abstract

Proton-proton interactions resulting in final states with two photons are studied in a search for the signature of flavor-changing neutral current interactions of top quarks (t) and Higgs bosons (H). The analysis is based on data collected at a center-of-mass energy of 13 TeV with the CMS detector at the LHC, corresponding to an integrated luminosity of 137 fb${}^{-1}$. No significant excess above the background prediction is observed. Upper limits on the branching fractions ($\mathcal{B}$) of the top quark decaying to a Higgs boson and an up (u) or charm quark (c) are derived through a binned fit to the diphoton invariant mass spectrum. The observed (expected) 95% confidence level upper limits are found to be 0.019 (0.031)% for $\mathcal{B}$(t $\to$ Hu) and 0.073 (0.051)% for $\mathcal{B}$(t $\to$ Hc). These are the strictest upper limits yet determined.

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/TOP-20-007 (CMS Public Pages)

References in corpus (61)

• XGBoost: A Scalable Tree Boosting System
• 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
• FeynRules 2.0 - A complete toolbox for tree-level phenomenology
• Parton distributions for the LHC Run II
• Dimension-Six Terms in the Standard Model Lagrangian
• Parton distributions with LHC data
• Confidence Level Computation for Combining Searches with Small Statistics
• Parton distributions from high-precision collider data
• PDF4LHC recommendations for LHC Run II
• UFO - The Universal FeynRules Output
• Top++: a program for the calculation of the top-pair cross-section at hadron colliders
• Comparative study of various algorithms for the merging of parton showers and matrix elements in hadronic collisions
• Event Generation with Sherpa 2.2
• Particle-flow reconstruction and global event description with the CMS detector
• The CMS trigger system
• Event generator tunes obtained from underlying event and multiparton scattering measurements
• Identification of heavy-flavour jets with the CMS detector in pp collisions at 13 TeV
• The CT10 NNLO Global Analysis of QCD
• Performance of the CMS muon detector and muon reconstruction with proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Uncertainties on alpha_S in global PDF analyses and implications for predicted hadronic cross sections
• Extraction and validation of a new set of CMS PYTHIA8 tunes from underlying-event measurements
• Multi-Target Regression via Input Space Expansion: Treating Targets as Inputs
• Precision luminosity measurement in proton-proton collisions at $\sqrt{s}=$ 13 TeV in 2015 and 2016 at CMS
• Measurement of the Inclusive W and Z Production Cross Sections in pp Collisions at sqrt(s) = 7 TeV
• High-precision differential predictions for top-quark pairs at the LHC
• 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
• Jet Flavour Classification Using DeepJet
• Top-Quark Decay at Next-to-Next-to-Leading Order in QCD
• Top-pair production at the LHC through NNLO QCD and NLO EW
• A new evaluation of the t->cH decay width in the standard model
• Effects of mixing with quark singlets
• A measurement of the Higgs boson mass in the diphoton decay channel
• FCNC top quark decay in the MSSM: a door to SUSY physics in high luminosity colliders?
• SUSY-induced FCNC top-quark processes at the Large Hadron Collider
• Higgs Mediated FCNC's in Warped Extra Dimensions
• Top-quark rare decay $t\to ch$ in R-parity-violating SUSY
• Top-quark pair production at the LHC: Fully differential QCD predictions at NNLO
• Loop Induced Flavor Changing Neutral Decays of the Top Quark in a General Two-Higgs-Doublet Model
• Handling uncertainties in background shapes: the discrete profiling method
• Measurements of Higgs boson properties in the diphoton decay channel in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Measurements of $\mathrm{t}\bar{\mathrm{t}}$H production and the CP structure of the Yukawa interaction between the Higgs boson and the top quark in the diphoton decay channel
• When the Higgs meets the Top: Search for t --> ch^0 at the LHC
• Flavor Changing Heavy Higgs Interactions at the LHC
• Top-quark decay into Higgs boson and a light quark at next-to-leading order in QCD
• Scalar FCNC and rare top decays in a two Higgs doublet model "for the top"
• SUSY induced top quark FCNC decay $t\to ch$ after Run I of LHC
• On the Flavor Structure of Natural Composite Higgs Models & Top Flavor Violation
• Search for the flavor-changing neutral current interactions of the top quark and the Higgs boson which decays into a pair of b quarks at $\sqrt{s}=$ 13 TeV
• Search for top-quark decays $t\to Hq$ with 36 fb${}^{-1}$ of $pp$ collision data at $\sqrt{s}=13$ TeV with the ATLAS detector
• Top Decays with Flavor Changing Neutral Higgs Interactions at the LHC
• Search for top quark decays $t\to qH$, with $H\to \gamma \gamma$, in $\sqrt{s}=13$ TeV $pp$ collisions using the ATLAS detector
• Search for flavor-changing neutral currents in top quark decays $t\to Hc$ and $t\to Hu$ in multilepton final states in proton-proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Evidence for the associated production of a single top quark and a photon in proton-proton collisions at $\sqrt{s}=$ 13 TeV

Cited by in corpus (10)

• Rare and exclusive few-body decays of the Higgs, Z, W bosons, and the top quark
• Coup de grace to the charged Higgs solution of $P_5^{\prime }$ and $R_{D^{(\ast )}}$ discrepancies
• Primary Observables for Top Quark Collider Signals
• Flavour-changing neutral scalar interactions of the top quark
• Leveraging on-shell interference to search for FCNCs of the top quark and the Z boson
• Search for flavor-changing neutral current interactions of the top quark mediated by a Higgs boson in proton-proton collisions at 13 TeV
• In-medium mass shift of two-flavored heavy mesons, $B_c$, $B_c^{\ast }$, $B_s$, $B_s^{\ast }$, $D_s$ and $D_s^{\ast }$
• Heavy-heavy and heavy-light mesons in cold nuclear matter
• Constraining the CP4-invariant three-Higgs-doublet model via top quark decays
• The Minimal Supersymmetric Standard Model with Non-Invertible Selection Rules