Probing top flavour-changing neutral scalar couplings at the CERN LHC

Abstract

Top decays into a light Higgs boson and an up or charm quark can reach detectable levels in Standard Model extensions with two Higgs doublets or with new exotic quarks, and in the Minimal Supersymmetric Standard Model. Using both a standard and a neural network analysis we show that the CERN Large Hadron Collider will give 3 sigma evidence of decays with Br(t -> Hc) >= 6.5 10^-5 or set a limit Br(t -> Hc) <= 4.5 10^-5 with a 95% confidence level if these decays are not observed. We also consider limits obtained from single top production associated with a neutral Higgs boson.

Uses elsart.cls. 16 pages, 9 PS figures. Some comments and references added. Final version to appear in PLB

References in corpus (6)

• New Topflavor Models with Seesaw Mechanism
• Decay widths of the neutral CP-even MSSM Higgs bosons in the Feynman-diagrammatic approach
• Multilepton production via top flavour-changing neutral couplings at the CERN LHC
• Scalar Mediated FCNC at the First Muon Collider
• Quark mixings and flavor changing interactions with singlet quarks
• Computation of confidence intervals for Poisson processes

Cited by in corpus (90)

• The Standard Model as an Effective Field Theory
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• A minimal set of top-Higgs anomalous couplings
• Higgs-dependent Yukawa couplings
• A global approach to top-quark flavor-changing interactions
• SUSY-induced FCNC top-quark processes at the Large Hadron Collider
• Higgs Mediated FCNC's in Warped Extra Dimensions
• The Hunt for New Physics at the Large Hadron Collider
• Top-quark rare decay $t\to ch$ in R-parity-violating SUSY
• Composite Higgs-Mediated FCNC
• Minimal Flavour Violation and Multi-Higgs Models
• When the Higgs meets the Top: Search for t --> ch^0 at the LHC
• The Custodial Randall-Sundrum Model: From Precision Tests to Higgs Physics
• Flavor Changing Heavy Higgs Interactions at the LHC
• Deciphering top flavor violation at the LHC with B factories
• Collider aspects of flavour physics at high Q
• The rare top quark decays $t\to cV$ in the topcolor-assisted technicolor model
• Top-quark decay into Higgs boson and a light quark at next-to-leading order in QCD
• Single Top-Quark Production in Flavor-Changing Z' Models
• Soft Supersymmetry Breaking, Scalar Top-Charm Mixing and Higgs Signatures
• SUSY-Induced Top Quark FCNC Processes at Linear Colliders
• Search for the lepton flavor violating decay A^0/H^0 --> tau^{+/-} mu^{+/-} at hadron colliders
• New Physics effects in the flavor-changing neutral couplings of the Top quark
• Simple models for the top asymmetry: constraints and predictions
• Disentangling Flavor Violation in the Top-Higgs Sector at the LHC
• Probing Topcolor-Assisted Technicolor from Top-Charm Associated Production at LHC
• Hunting the Flavon
• Flavor Changing Neutral Currents involving Heavy Quarks with Four Generations
• Scalar FCNC and rare top decays in a two Higgs doublet model "for the top"
• Flavour Changing Neutral Higgs Boson Decays from Squark - Gluino Loops
• Higgs Boson Flavor-Changing Neutral Decays into Top Quark in a General Two-Higgs-Doublet Model
• Probing the Anomalous FCNC Interactions in Top-Higgs Final State and Charge Ratio Approach
• Constraints on top quark FCNC from electroweak precision measurements
• Flavor Violating Higgs signals in the Texturized Two-Higgs Doublet Model (2HDM-Tx)
• SUSY-electroweak one-loop contributions to Flavour-Changing Higgs-Boson Decays
• Top flavour-changing neutral coupling signals at a linear collider
• Rare Top-quark Decays to Higgs boson in MSSM
• Rare Decay of the Top t->c l lbar and Single Top Production at International Linear Collider
• Effective Lagrangian approach to Higgs-mediated FCNC top quark decays
• Top Decays with Flavor Changing Neutral Higgs Interactions at the LHC
• Phenomenology of flavon fields at the LHC
• Top and Higgs Flavor Changing Neutral Couplings in two Higgs Doublets Model
• Enhancing $thj$ Production from Top-Higgs FCNC Couplings
• R-parity violating effects in top quark FCNC productions at LHC
• Scalar Dark Matter and Standard Model with Four Generations
• 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
• Rare top quark and Higgs boson decays in Alternative Left-Right Symmetric Models
• FCNC production of same sign Top quark pairs at the LHC
• Top Quark FCNC Decay to 125GeV Higgs boson in the Littlest Higgs Model with T-parity
• Radion Mediated Flavor Changing Neutral Currents
• Direct and Indirect Searches for Top-Higgs FCNC Couplings
• The rare top decay $t\to cg$ in topcolor assisted technicolor models
• Probing the top-Higgs boson FCNC couplings via the $h\to \gamma \gamma$ channel at the HE-LHC and FCC-hh
• Probing tqZ anomalous couplings in the trilepton signal at the HL-LHC, HE-LHC and FCC-hh
• 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
• Searches for anomalous $tqZ$ couplings from the trilepton signal of $tZ$ associated production at the 14 TeV LHC
• Constraints on top quark flavor changing neutral currents using diphoton events at the LHC
• Top-Quark FCNC Decay t->cgg in Topcolor-assisted Technicolor Model
• Rare t-quark decays $t\to c{l}_j^{+}{l}_k^{-}$, $t\to c\widetilde{{\nu }_j}{\nu }_k$ in the minimal four color symmetry model
• Search for t->ch at e+e- Linear Colliders
• A low-scale flavon model with a $Z_N$ symmetry
• Exploring the Anomalous Top-Higgs FCNC Couplings at the electron proton colliders
• Searches for the FCNC couplings from top-Higgs associated production signal with $h\to \gamma \gamma$ at the LHC
• A light scalar as the messenger of electroweak and flavor symmetry breaking
• Scalar Dark Matter Search at the LHC through FCNC Top Decay
• FCNC Top Quark Decays in Extra Dimensions
• Higgs mediated Double Flavor Violating top decays in Effective Theories
• Flavor-changing interactions with singlet quarks and their implications for the LHC
• Ultraboosted $Zt$ and $\gamma t$ production at the HL-LHC and FCC-hh
• Flavor changing top decays to charm and Higgs with $\tau \tau$ at the LHC
• Top quark decay t -> cb\bar{b} in topcolor-assisted technicolor models
• Higgs FCNC h -> t* c decay at the muon collider
• Finding flavons at colliders
• Novel flavour-changing neutral currents in the top quark sector
• Flavour changing effects on e^+ e^- -> H b \bar{s}, H \bar{b} s in the MSSM
• Investigation of Higgs boson anomalous FCNC interactions in the simple 3-3-1 model
• Probing anomalous top-Higgs couplings at the HL-LHC via $H\to W{W}^{\ast }$ decay channels
• Probing FCNC couplings in single top quark production associated with a neutral gauge boson at future lepton colliders
• Rare top decay t-> c l+l- as a probe of new physics
• Machine Learning Approaches to Top Quark Flavor-Changing Four-Fermion Interactions in Trilepton Signals at the LHC
• Single top production associated with a neutral scalar at LHC in topcolor-assisted technicolor
• Exploring the Top-Higgs FCNC Couplings at Polarized Linear Colliders with Top Spin Observables
• CKM-suppressed top quark decays t -> q + W in the SM and beyond
• Top-philic Machine Learning
• The single t-quark productions via the flavor-changing processes in the topcolor-assisted technicolor model at the hadron colliders
• Indirect tests of the Randall-Sundrum model
• Dynamical CP Violation and Flavour-Changing Processes
• Single Higgs boson production in association with a top quark through FCNSI