Probing the top-Higgs boson FCNC couplings via the $h\to \gamma \gamma$ channel at the HE-LHC and FCC-hh

Abstract

We investigate the sensitivity of future searches for the top-Higgs boson Flavour Changing Neutral Current (FCNC) couplings $tqh$~($q=u,c$) at the proposed High Energy Large Hadron Collider~(HE-LHC) and Future Circular Collider in hadron-hadron mode (FCC-hh). We perform a full simulation for two processes in the $h\to \gamma \gamma$ decay channel (where $h$ is the discovered Higgs state): single top quark FCNC production in association with the Higgs boson (plus a jet) and top quark pair production with FCNC decays $t\to qh$. All the relevant backgrounds are considered in a cut based analysis to obtain the limits on the Branching Ratios (BRs) of $t\to uh$ and $t\to ch$. It is shown that, at the HE-LHC with an integrated luminosity of 15 ab${}^{-1}$ and at the FCC-hh with an integrated luminosity of 30 ab${}^{-1}$, {{the BR($t\to uh$) (BR($t\to ch$)) can be probed, respectively, to $7.0(8.5)\times 10^{-5}$ and $2.3(3.0)\times 10^{-5}$ at the 95\% Confidence Level (CL) (assuming a 10\% systematic uncertainty on the background), which is almost two orders of magnitude better than the current 13 TeV LHC experimental results.

arXiv comment19 pages, 5 figures, references added, typos corrected, version in Physical Review D

References in corpus (67)

• 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
• An Introduction to PYTHIA 8.2
• FastJet user manual
• Asymptotic formulae for likelihood-based tests of new physics
• DELPHES 3, A modular framework for fast simulation of a generic collider experiment
• FeynRules 2.0 - A complete toolbox for tree-level phenomenology
• Parton distributions for the LHC Run II
• Comparative study of various algorithms for the merging of parton showers and matrix elements in hadronic collisions
• MadAnalysis 5, a user-friendly framework for collider phenomenology
• Single Top Production as a Window to Physics Beyond the Standard Model
• QCD radiation in the production of heavy colored particles at the LHC
• Physics Opportunities of a 100 TeV Proton-Proton Collider
• Effective-Field-Theory Approach to Top-Quark Production and Decay
• QCD NLO and EW NLO corrections to $t\bar{t}H$ production with top quark decays at hadron collider
• A new evaluation of the t->cH decay width in the standard model
• A minimal set of top-Higgs anomalous couplings
• New Method for Detecting Charged (Pseudo-)Scalars at Colliders
• Vectorlike leptons at the Large Hadron Collider
• New Topflavor Models with Seesaw Mechanism
• Flavour Changing Higgs Couplings in a Class of Two Higgs Doublet Models
• Probing top flavour-changing neutral scalar couplings at the CERN LHC
• Search for New Physics via Single Top Production at the LHC
• Top Quark Forward-Backward Asymmetry and Same-Sign Top Quark Pairs
• When the Higgs meets the Top: Search for t --> ch^0 at the LHC
• Automatic computations at next-to-leading order in QCD for top-quark flavor-changing neutral processes
• Top-quark decay into Higgs boson and a light quark at next-to-leading order in QCD
• Anomalous Top-Higgs Couplings and Top Polarisation in Single Top and Higgs Associated Production at the LHC
• Soft Supersymmetry Breaking, Scalar Top-Charm Mixing and Higgs Signatures
• Next-to-leading order QCD corrections to the top quark decay via model-independent FCNC couplings
• Physics at a 100 TeV pp collider: Standard Model processes
• Disentangling Flavor Violation in the Top-Higgs Sector at the LHC
• The "Top Priority" at the LHC
• Asymptotically Free Natural SUSY Twin Higgs
• SUSY induced top quark FCNC decay $t\to ch$ after Run I of LHC
• 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
• Beyond the Standard Model Physics at the HL-LHC and HE-LHC
• Probing the Anomalous FCNC Interactions in Top-Higgs Final State and Charge Ratio Approach
• Determining the Chirality of Yukawa Couplings via Single Charged Higgs Boson Production in Polarized Photon Collision
• Searching for $t\to ch$ with Multi-Leptons
• Flavor Violating Higgs signals in the Texturized Two-Higgs Doublet Model (2HDM-Tx)
• Constraints on top quark FCNC from electroweak precision measurements
• Proton Colliders at the Energy Frontier
• 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
• Flavor Changing Neutral Coupling Mediated Radiative Top Quark Decays at Next-to-Leading Order in QCD
• 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
• Search for top quark decays via Higgs-boson-mediated flavor-changing neutral currents in pp collisions at sqrt(s) = 8 TeV
• Constraining the flavor changing Higgs couplings to the top-quark at the LHC
• Enhancing $thj$ Production from Top-Higgs FCNC Couplings
• Constraints on flavor-changing neutral-current $Htq$ couplings from the signal of $tH$ associated production with QCD next-to-leading order accuracy at the LHC
• Search for flavour-changing neutral current top quark decays $t\to Hq$ in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Top Quark FCNC Decay to 125GeV Higgs boson in the Littlest Higgs Model with T-parity
• Higgs mediated flavor violating top quark decays t --> u_i H, u_i gamma, u_i gamma gamma, and the process gamma gamma --> t c in effective theories
• Exotic Higgs Decays in Type-II 2HDMs at the LHC and Future 100 TeV Hadron Colliders
• Rare top quark decays at a 100 TeV proton-proton collider: $t\to bWZ$ and $t\to hc$
• Searches for top-Higgs FCNC couplings via the Whj signal with $h\to \gamma \gamma$ at the LHC
• Probing the top quark flavor-changing couplings at CEPC
• Exploring the Anomalous Top-Higgs FCNC Couplings at the electron proton colliders
• Higgs Bosons from Top Quark Decays
• Searches for the FCNC couplings from top-Higgs associated production signal with $h\to \gamma \gamma$ at the LHC
• Prospect for top quark FCNC searches at the FCC-hh
• Search for Flavor Changing Neutral Currents in $t\to Hc,H\to \tau \tau$ Decay at the LHC
• Charming Top Decays with Flavor Changing Neutral Higgs Boson and WW at Hadron Colliders
• Probing anomalous top-Higgs couplings at the HL-LHC via $H\to W{W}^{\ast }$ decay channels

Cited by in corpus (12)

• Large $t\to cZ$ as a Sign of Vector-Like Quarks in Light of the $W$ Mass
• Probing top quark FCNC couplings in the triple-top signal at the high energy LHC and future circular collider
• Probing tqZ anomalous couplings in the trilepton signal at the HL-LHC, HE-LHC and FCC-hh
• Flavour-changing neutral scalar interactions of the top quark
• Scotogenic top-quark FCNC decays
• $CP$ violation in the $HZZ$ vertex and left-right asymmetries
• Non-diagonal contributions to $Z\gamma V^{\ast }$ vertex, polarizations and bounds on $Z\overline{t}q$ couplings
• Studying Same-Sign Top Pair Production in Flavor Changing Scalar Models at the HL-LHC
• Investigating Top-Higgs FCNC Couplings at the FCC-hh
• Lepton flavor violating top quark FCNC processes at the $\mu$TRISTAN
• Exploring Anomalous Flavor-Changing Neutral tqh Transitions at Future Muon Colliders: Insights from ${\mu }^{+}{\mu }^{-}\to t\bar{q}h$ Interactions
• Two Higgs doublet model fitting and $t\bar{t}b\bar{b}$ signal at the ILC