Constraints on top quark FCNC from electroweak precision measurements

Abstract

We study the one-loop contributions of the effective flavor changing neutral couplings (FCNC) tcZ and tcH on the electroweak precision observables Gamma_Z, R_c, R_b, R_l, A_c and A^FB_c. Using the known experimental limits on these observables, we may place 95% CL bounds on these FCNC couplings which in turn translate into the following limits for the branching ratios: BR(t -> cZ) < 6.7 10^-2 and BR(t -> cH) < (0.09 - 2.9) 10^-3 for 114 < m_H < 170 GeV.

arXiv comment10 pages, 3 figures. References added. Errors corrected. Numerical results for BR have changed

References in corpus (52)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Phenomenology of Two Higgs Doublet Models with Flavor Changing Neutral Currents
• Observable contributions of new exotic quarks to quark mixing
• Effects of mixing with quark singlets
• FCNC top quark decay in the MSSM: a door to SUSY physics in high luminosity colliders?
• Probing lepton flavour violation with Higgs boson decays H-> li+lj
• Flavor-changing Top Quark Decays In R-Parity Violating SUSY
• Effective description of quark mixing
• New Supersymmetric Contributions to $t->cV$
• Top-quark rare decay $t\to ch$ in R-parity-violating SUSY
• Probing flavor changing top-charm-scalar interactions in $e^{+}{e}^{-}$ collisions
• Probing Electroweak Top Quark Couplings at Hadron Colliders
• Review of Top Quark Physics
• Flavour changing top decays in supersymmetric extensions of the standard model
• Top-Quark Decay Via Flavor-Changing Neutral Currents at Hadron Colliders
• Loop Induced Flavor Changing Neutral Decays of the Top Quark in a General Two-Higgs-Doublet Model
• Probing top flavour-changing neutral scalar couplings at the CERN LHC
• Rare top decays t -> c gamma, t -> c g and CKM unitarity
• Top-Charm Associated Production in High Energy $e^{+}{e}^{-}$ Collisions
• Analysis of tbW and ttZ couplings from CLEO and LEP/SLC data
• Flavour changing top quark decay within the minimal supersymmetric standard model
• Search for single-top production in ep collisions at HERA
• Search for Single Top Production at LEP
• Flavor Changing Neutral Scalar Currents at ${\mu }^{+}{\mu }^{-}$ Colliders
• $t\to cV$ via SUSY FCNC couplings in the unconstrained MSSM
• Low-Energy Constraints on New Physics Revisited
• Top-Quark Decay Via the Anomalous Coupling $\bar{t}c\gamma$ at Hadron Colliders
• Search for Single Top Quark Production at LEP2
• The rare top quark decays $t\to cV$ in the topcolor-assisted technicolor model
• Effective Field Theory of Anomalous Gauge-Boson Couplings at High-Energy pp Colliders
• R_b and New Physics: A Comprehensive Analysis
• Search for Single Top Quark Production in ep Collisions at HERA
• Effective-Lagrangian approach to precision measurements: the anomalous magnetic moment of the muon
• Search for Single Top Production in e+e- Collisions at sqrt(s) up to 209GeV
• Search for single top production via FCNC at LEP at sqrt(s) = 189-208 GeV
• Top flavour violating decays in general supersymmetric models
• Testing flavor-changing neutral currents in the rare decays t->cViVj
• Anomalous Couplings of the Third Generation in Rare B Decays
• t->cg, cγ, cZ in the Left-Right Supersymmetric Model
• Probing New Physics from Top-charm Associated Productions at Linear Colliders
• Effective Lagrangian approach to Higgs-mediated FCNC top quark decays
• Probing new physics from top quark FCNC processes at linear colliders : a mini review
• The anomalous chromomagnetic dipole moment of the top quark in the standard model and beyond
• Bounds for Lepton Flavor Violation and the Pseudoscalar Higgs in the General Two Higgs Doublet Model using $g-2$ muon factor
• Rare top quark and Higgs boson decays in Alternative Left-Right Symmetric Models
• The flavor-changing rare top decays $t\to cVV$ in topcolor-assisted technicolor theory
• Flavor changing t -> c l_1^- l_2^+ decay in the general two Higgs doublet model
• Using the decay $b\to s\gamma$ to bound the chromomagnetic dipole moment of the top quark
• t -> c H^0 decay in the general two Higgs doublet model
• Effective operator contributions to the oblique parameters
• Constraint of the magnetic moment of the top quark
• Progress on Models of Neutrino Masses and Mixings

Cited by in corpus (35)

• Deciphering top flavor violation at the LHC with B factories
• Top-quark decay into Higgs boson and a light quark at next-to-leading order in QCD
• New Physics effects in the flavor-changing neutral couplings of the Top quark
• Search for flavor changing neutral currents in decays of top quarks
• Chromomagnetic Dipole Moment of the Top Quark Revisited
• Probing the Anomalous FCNC Interactions in Top-Higgs Final State and Charge Ratio Approach
• Dimension six FCNC operators and top production at the LHC
• Combined effects of strong and electroweak FCNC effective operators in top quark physics at the LHC
• 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
• Flavor violating signatures of lighter and heavier Higgs bosons within the Two Higgs Doublet Model Type-III at the LHeC
• Direct and Indirect Searches for Top-Higgs FCNC Couplings
• Probing the top-Higgs boson FCNC couplings via the $h\to \gamma \gamma$ channel at the HE-LHC and FCC-hh
• Searches for top-Higgs FCNC couplings via the Whj signal with $h\to \gamma \gamma$ at the LHC
• Constraints on top quark flavor changing neutral currents using diphoton events at the LHC
• Searches for the Anomalous FCNC Top-Higgs Couplings with Polarized Electron Beam at the LHeC
• 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
• FCNC Top Quark Decays in Extra Dimensions
• Study of anomalous top quark FCNC interactions via $tW$-channel of single top
• Higgs mediated Double Flavor Violating top decays in Effective Theories
• Flavour-changing neutral scalar interactions of the top quark
• Study of the Top Quark FCNC
• Probing the anomalous $tq\gamma$ couplings through single top production at the future lepton-hadron colliders
• Higgs FCNC h -> t* c decay at the muon collider
• Leveraging on-shell interference to search for FCNCs of the top quark and the Z boson
• t-c gamma and t-cg in warped extra dimensions
• Rare top decay and CP violation in THDM
• Probing anomalous top-Higgs couplings at the HL-LHC via $H\to W{W}^{\ast }$ decay channels
• Search for the Neutral Current Top Quark Decay t-->Zc Using the Ratio of Z-Boson + 4 Jets to W-Boson + 4 Jets Production
• Exploring the Top-Higgs FCNC Couplings at Polarized Linear Colliders with Top Spin Observables
• Heavy quarkonium production through the top quark rare decays via the channels involving flavor changing neutral currents
• Probing the anomalous tqgamma couplings in photon-proton collisions
• Studying flavor-changing neutral tqZ couplings: Current constraints and future prospects
• Investigation of the FCNC couplings between the top quark and the photon in $\gamma \gamma$ and ${\gamma }^{\ast }{\gamma }^{\ast }$ collisions at the CLIC
• Constraints on the charged Higgs boson of the two Higgs doublet model type III