Deciphering top flavor violation at the LHC with B factories

Abstract

The LHC will have unprecedented sensitivity to flavor-changing neutral current (FCNC) top quark decays, whose observation would be a clear sign of physics beyond the standard model. Although many details of top flavor violation are model dependent, the standard model gauge symmetries relate top FCNCs to other processes, which are strongly constrained by existing data. We study these constraints in a model independent way, using a low energy effective theory from which the new physics is integrated out. We consider the most important operators which contribute to top FCNCs and analyze the current constraints on them. We find that the data rule out top FCNCs at a level observable at the LHC due to most of the operators comprising left-handed first or second generation quark fields, while there remains a substantial window for top decays mediated by operators with right-handed charm or up quarks. If FCNC top decays are observed at the LHC, such an analysis may help decipher the underlying physics.

arXiv comment17 pages, 5 figures; some typos corrected

References in corpus (61)

• The Cosmological Parameters 2006
• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• Weak Decays Beyond Leading Logarithms
• Minimal Flavour Violation: an effective field theory approach
• CP Violation and the CKM Matrix: Assessing the Impact of the Asymmetric B Factories
• The Strongly-Interacting Light Higgs
• Universal Unitarity Triangle and Physics Beyond the Standard Model
• A New Approach to a Global Fit of the CKM Matrix
• LHC Signals from Warped Extra Dimensions
• Improved Model-Independent Analysis of Semileptonic and Radiative Rare B Decays
• B->V gamma Beyond QCD Factorisation
• Collider Signals of Top Quark Flavor Violation from a Warped Extra Dimension
• Effects of mixing with quark singlets
• Measurement of the B -> Xs l+ l- branching fraction with a sum over exclusive modes
• Improved Measurement of the Electroweak Penguin Process B->Xsll
• Implications of the measurement of the B^0_s-\bar B^0_s mass difference
• SUSY-induced FCNC top-quark processes at the Large Hadron Collider
• Effective description of quark mixing
• Semileptonic D->pi/K and B->pi/D decays in 2+1 flavor lattice QCD
• Top-quark rare decay $t\to ch$ in R-parity-violating SUSY
• Flavour Changing Neutral Currents, Weak-Scale Scalars and Rare Top Decays
• Completing the NLO QCD calculation of B -> Xs gamma
• Probing Electroweak Top Quark Couplings at Hadron Colliders
• Flavour changing top decays in supersymmetric extensions of the standard model
• A Precision Model Independent Determination of |Vub| from B -> pi e nu
• Top-Quark Decay Via Flavor-Changing Neutral Currents at Hadron Colliders
• Implications of the $B\to X\ell {\bar{\nu }}_{\ell }$ lepton spectrum for heavy quark physics
• Profiles of the Unitarity Triangle and CP-Violating Phases in the Standard Model and Supersymmetric Theories
• Probing top flavour-changing neutral scalar couplings at the CERN LHC
• Rare top decays t -> c gamma, t -> c g and CKM unitarity
• The UTfit Collaboration Report on the Status of the Unitarity Triangle beyond the Standard Model I. Model-independent Analysis and Minimal Flavour Violation
• Precision determination of |V_{ub}| from inclusive decays
• Search for single-top production in ep collisions at HERA
• Measurement of the Electron Energy Spectrum and its Moments in Inclusive B->X e nu Decays
• $t\to cV$ via SUSY FCNC couplings in the unconstrained MSSM
• Lattice calculation of the zero-recoil form factor of anti-B --> D* lepton anti-neutrino: toward a model independent determination of |V(cb)|
• Search for Single Top Quark Production at LEP2
• Constraining the Phase of B_s - \bar{B}_s Mixing
• New Physics effects in the flavor-changing neutral couplings of the Top quark
• New Physics and Evidence for a Complex CKM
• Top quark physics in hadron collisions
• A Model Independent Determination of |V_{ub}|
• Moments of the electron energy spectrum and partial branching fraction of $B\to X_{c}e\nu$ decays at Belle
• Observation of b --> d gamma and Determination of |V_td/V_ts|
• Study of ATLAS sensitivity to FCNC top decays
• Extracting short distance information from b -> s l+ l- effectively
• Constraints on top quark FCNC from electroweak precision measurements
• Measurement of |V_ub| using inclusive B -> X_u l nu decays with a novel X_u-reconstruction method
• Minimal Flavour Violation Waiting for Precise Measurements of Delta M_s, S_{psi phi}, A^s_SL, |V_ub|, gamma and B^0_{s,d} -> mu+ mu-
• Effective Lagrangian approach to Higgs-mediated FCNC top quark decays
• Probing new physics from top quark FCNC processes at linear colliders : a mini review
• Moments of lepton spectrum in B decays and the $m_b-m_c$ quark mass difference
• Determination of |V_ub| from Measurements of the Inclusive Charmless Semileptonic Partial Rates of B Mesons using Full Reconstruction Tags
• Heavy quark symmetry in B -> D(*) ell nu spectra
• Branching Fraction Measurements of B+ -> rho+ gamma, B0 -> rho0 gamma, and B0 -> omega gamma
• Semileptonic B Decays with Nf=2+1 Dynamical Quarks
• The CKM matrix and CP Violation
• Effects of a heavy top quark on low energy data using the electroweak chiral Lagrangian
• Testing the left-handedness of the b \to c transition
• Limits on Anomalous Top Couplings from Z Pole Physics
• Top Quark Mass Measurements

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• Dimension-Six Terms in the Standard Model Lagrangian
• A minimal set of top anomalous couplings
• Flavor Physics Constraints for Physics Beyond the Standard Model
• Flavor Physics in the Randall-Sundrum Model: I. Theoretical Setup and Electroweak Precision Tests
• Flavour physics from an approximate U(2)^3 symmetry
• General Minimal Flavor Violation
• Operators up to Dimension Seven in Standard Model Effective Field Theory Extended with Sterile Neutrinos
• A global approach to top-quark flavor-changing interactions
• The Hunt for New Physics at the Large Hadron Collider
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• Strong Higgs Interactions at a Linear Collider
• A Simple Flavor Protection for RS
• BasisGen: automatic generation of operator bases
• Search for flavor-changing neutral currents in top-quark decays t to Zq in pp collisions at sqrt(s) = 8 TeV
• eHDECAY: an Implementation of the Higgs Effective Lagrangian into HDECAY
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• Pinning down electroweak dipole operators of the top quark
• Flavor Constraints from Unitarity and Analyticity
• Future sensitivity to new physics in B_d, B_s and K mixings
• Top and Beauty synergies in SMEFT-fits at present and future colliders
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• Probing anomalous tWb interactions with rare B decays
• The Flavor of UV Physics
• A Viable Randall-Sundrum Model for Quarks and Leptons with T' Family Symmetry
• New physics in $B$ meson mixing: future sensitivity and limitations
• Standard Model Effective Field Theory: Integrating out a Generic Scalar
• On the Flavor Structure of Natural Composite Higgs Models & Top Flavor Violation
• Constraining top-quark couplings combining top-quark and $\mathbf{B}$ decay observables
• Top condensation as a motivated explanation of the top forward-backward asymmetry
• Dimension six FCNC operators and top production at the LHC
• Exploring top quark FCNC within 2HDM type III in association with flavor physics
• Towards establishing the spin of warped gravitons
• On the Universality of CP Violation in Delta F = 1 Processes
• R-parity violating effects in top quark FCNC productions at LHC
• SVZ + 1/q2 expansion versus some QCD holographic Models
• Next-to-leading order QCD corrections to $tZ$ associated production via the flavor-changing neutral-current couplings at hadron colliders
• Leptonic Monotops at LHC
• Rare b hadron decays at the LHC
• QCD Corrections to Flavor Changing Neutral Coupling Mediated Rare Top Quark Decays
• Small violations of unitarity, the phase in Bs mixing and visible t->cZ decays at the LHC
• Signatures of NP models in top FCNC decay t --> c(u) l+ l-
• Probing topcolor-assisted technicolor from top charge asymmetry and triple-top production at the LHC
• Future prospects of B physics
• UV physics from IR features: new prospects from top flavor violation
• Anomalous $tqZ$ coupling effects in rare B- and K-meson decays
• Covariant Description of Flavor Conversion in the LHC Era
• Anomalous $tq\gamma$ coupling effects in exclusive radiative B-meson decays
• Constraints on anomalous $tcZ$ coupling from $\bar{B}\to {\bar{K}}^{\ast }{\mu }^{+}{\mu }^{-}$ and $B_s\to {\mu }^{+}{\mu }^{-}$ decays
• New physics contributions to the forward-backward asymmetry at the Tevatron
• MEtop - a generator for single top production via FCNC interactions
• Model Independent Predictions for Rare Top Decays with Weak Coupling
• TASI Lectures on Flavor Physics
• Probing four-fermion operators in the triple top production at future hadron colliders
• Covariant Description of Flavor Violation at the LHC
• B -> Xsγconstraints on the top quark anomalous t-> cγcoupling
• Impact of FCNC top quark interactions on BR(t -> b W)
• Model-Independent Constraints on Lepton-Flavor-Violating Decays of the Top Quark
• Machine Learning Approaches to Top Quark Flavor-Changing Four-Fermion Interactions in Trilepton Signals at the LHC
• Top-quark flavor-changing $tqZ$ couplings and rare $\Delta F=1$ processes
• Search for the Neutral Current Top Quark Decay t-->Zc Using the Ratio of Z-Boson + 4 Jets to W-Boson + 4 Jets Production
• Top quark physics in the Large Hadron Collider era
• Constraining EDM and MDM lepton dimension five interactions in the electroweak sector
• CP Violation in the $B_s^0$ system
• Top Decays in the Standard Model and Beyond