Probing top quark FCNC couplings in the triple-top signal at the high energy LHC and future circular collider

Abstract

Our main aim in this paper is to present detailed studies to probe the top quark flavor changing neutral current (FCNC) interactions at $tqg$, $tq\gamma$, $tqH$ and $tqZ({\sigma }^{\mu \nu },{\gamma }_{\mu })$ vertices in the triple-top signal $pp\to t\bar{t}t(\bar{t}t\bar{t})$ at the high energy proposal of Large Hadron Collider (HE-LHC) and future circular hadron-hadron collider (FCC-hh). To this end, we investigate the production of three top quarks which arises from the FCNC couplings taken into account the fast simulation at $\sqrt{s}=27$ TeV of HE-LHC and 100 TeV of FCC-hh considering the integrated luminosities of 10, 15 and 20 ab${}^{-1}$. All the relevant backgrounds are considered in a cut based analysis to obtain the limits on the anomalous couplings and the corresponding branching ratios. The obtained exclusion limits on the coupling strengths and the branching ratios are summarized and compared in details with the results in the literature, namely the most recent direct LHC experimental limits and HL-LHC projections as well. We show that, for higher energy phase of LHC, a dedicated search for the top quark FCNC couplings can achieve much better sensitivities to the triple-top signal than other top quark production scenarios. We found that the limits for the branching ratios of $tqg$ and $tqH$ transitions could reach an impressive sensitivity and the obtained 95\% CL limits are at least three orders of magnitude better than the current LHC experimental results as well as the existing projections of HL-LHC.

arXiv comment18 pages, 8 figures and 6 Tables; Final version accepted for publication in Nuclear Physics B

References in corpus (80)

• 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
• 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
• Parton distributions with LHC data
• Parton distributions from high-precision collider data
• UFO - The Universal FeynRules Output
• TMVA - Toolkit for Multivariate Data Analysis
• Flavor Structure of Warped Extra Dimension Models
• A minimal set of top anomalous couplings
• The automation of next-to-leading order electroweak calculations
• Physics Opportunities of a 100 TeV Proton-Proton Collider
• Family non-universal Z' models with protected flavor-changing interactions
• A minimal set of top-Higgs anomalous couplings
• SUSY-induced FCNC top-quark processes at the Large Hadron Collider
• Flavour Changing Higgs Couplings in a Class of Two Higgs Doublet Models
• Rare top decays t -> c gamma, t -> c g and CKM unitarity
• Measurement of the cross section for top quark pair production in association with a W or Z boson in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Search for anomalous Wtb couplings and flavour-changing neutral currents in t-channel single top quark production in pp collisions at sqrt(s) = 7 and 8 TeV
• Measurement of top quark pair production in association with a Z boson in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Search for heavy Majorana neutrinos in mu+mu+[mu-mu-]+jets and e+e+[e-e-]+jets events in pp collisions at sqrt(s) = 7 TeV
• Measurement of the production cross-section of a single top quark in association with a $Z$ boson in proton--proton collisions at 13 TeV with the ATLAS detector
• Exploring the Anomalous Higgs-top Couplings
• Physics at the FCC-hh, a 100 TeV pp collider
• Multilepton production via top flavour-changing neutral couplings at the CERN LHC
• Search for single top-quark production via flavour changing neutral currents at 8 TeV with the ATLAS detector
• Scalar FCNC and rare top decays in a two Higgs doublet model "for the top"
• Search for anomalous single top quark production in association with a photon in pp collisions at sqrt(s) = 8 TeV
• Triple-Top Signal of New Physics at the LHC
• Search for associated production of a Z boson with a single top quark and for tZ flavour-changing interactions in pp collisions at sqrt(s) = 8 TeV
• 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 flavour-changing neutral current top-quark decays $t\to qZ$ in proton-proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Probing the Anomalous FCNC Interactions in Top-Higgs Final State and Charge Ratio Approach
• Flavor Violating Higgs signals in the Texturized Two-Higgs Doublet Model (2HDM-Tx)
• Top-quark FCNC Productions at LHC in Topcolor-assisted Technicolor Model
• 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
• Measurement of the associated production of a single top quark and a Z boson in pp collisions at $\sqrt{s}=$ 13 TeV
• Single top quark production as a probe of anomalous $tq\gamma$ and $tqZ$ couplings at the FCC-ee
• Search for top quark decays $t\to qH$, with $H\to \gamma \gamma$, in $\sqrt{s}=13$ TeV $pp$ collisions using the ATLAS detector
• Single top-quark production at the Tevatron and the LHC
• Zt, gamma t and t production at hadron colliders via strong flavour-changing neutral couplings
• 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
• Top-Quark Physics: Status and Prospects
• Search for flavour-changing neutral current top quark decays $t\to Hq$ in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Rare Top Decays in Minimal and Non-minimal Universal Extra Dimension
• Double Top Production at Hadronic Colliders
• Single top quark production at the LHC
• Top quark electroweak couplings at future lepton colliders
• Direct and Indirect Searches for Top-Higgs FCNC Couplings
• Constraining top quark flavor violation and dipole moments through three and four top quark productions at the LHC
• Probing the top-Higgs boson FCNC couplings via the $h\to \gamma \gamma$ channel at the HE-LHC and FCC-hh
• Photon initiated single top quark production via flavor-changing neutral currents at the LHC
• The Top Quark
• Searches for top-Higgs FCNC couplings via the Whj signal with $h\to \gamma \gamma$ at the LHC
• Top-quark physics at the Large Hadron Collider
• Rare top quark decays at a 100 TeV proton-proton collider: $t\to bWZ$ and $t\to hc$
• Searches for anomalous $tqZ$ couplings from the trilepton signal of $tZ$ associated production at the 14 TeV LHC
• Probing the top quark flavor-changing couplings at CEPC
• Top-Quark FCNC Decay t->cgg in Topcolor-assisted Technicolor Model
• Constraints on top quark flavor changing neutral currents using diphoton events at the LHC
• $t\to cg$ and $t\to cZ$ in Universal Extra Dimensional Models
• Exploring the Anomalous Top-Higgs FCNC Couplings at the electron proton colliders
• SM Higgs boson and $t\to cZ$ decays in the 2HDM type III with CP violation
• Search for anomalous couplings via single top quark production in association with a photon at LHC
• Top quark FCNC couplings at future circular hadron electron colliders
• Search for top quark flavour changing neutral currents in same-sign top quark production
• Top quark anomalous FCNC production via $tqg$ couplings at FCC-hh
• Searches for the FCNC couplings from top-Higgs associated production signal with $h\to \gamma \gamma$ at the LHC
• Fingerprinting the Top quark FCNC via anomalous $Ztq$ couplings at the LHeC
• Search for the $t\to ch$ decay at hadron colliders
• What can We Learn from Triple Top-Quark Production?
• Probing anomalous $tq\gamma$ and $tqg$ couplings via single top production in association with photon at FCC-hh
• Top FCNC interactions through dimension six four-fermion operators at the electron proton collider
• Charming Top Decays with Flavor Changing Neutral Higgs Boson and WW at Hadron Colliders
• Ultraboosted $Zt$ and $\gamma t$ production at the HL-LHC and FCC-hh
• Probing the anomalous $tq\gamma$ couplings through single top production at the future lepton-hadron colliders
• Flavor signatures of complex anomalous $tcZ$ couplings

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• Observation of four-top-quark production in the multilepton final state with the ATLAS detector
• Large $t\to cZ$ as a Sign of Vector-Like Quarks in Light of the $W$ Mass
• Studying the $b\to s{\ell }^{+}{\ell }^{-}$ anomalies and $(g-2{)}_{\mu }$ in $R$-parity violating MSSM framework with the inverse seesaw mechanism
• Probing tqZ anomalous couplings in the trilepton signal at the HL-LHC, HE-LHC and FCC-hh
• Triple top quark production in Standard Model
• Search for the limits on anomalous neutral triple gauge couplings via $ZZ$ production in the $\ell \ell \nu \nu$ channel at FCC-hh
• Loop induced top quark FCNC through top quark and dark matter interactions
• Probing four-fermion operators in the triple top production at future hadron colliders
• Effect of the parameterization of the distribution functions on the longitudinal structure function at small $x$
• Rare top-quark decays $t\to cg(g)$ in the aligned two-Higgs-doublet model
• Leveraging on-shell interference to search for FCNCs of the top quark and the Z boson
• Probing FCNC couplings in single top quark production associated with a neutral gauge boson at future lepton colliders
• Importance of the heavy-quarks longitudinal structure function measurements at future circular collider energies
• Heavy quark structure functions from unifying the color dipole picture and double asymptotic scaling approaches
• Probing the anomalous tqgamma couplings in photon-proton collisions
• Collinear approach for top quark production at ep colliders
• $M_{TN}$ is all you need: production of multiple semi-invisible resonances at hadron colliders
• Signs of new physics in top quark pair production associated with a neutrino pair at the LHC