Novel and Updated Bounds on Flavor-Violating Z Interactions in the Quark Sector

Abstract

We derive bounds on the flavor-violating (FV) couplings of the $Z$ boson to quarks and present future sensitivity projections. Our analysis shows that the current bounds on the FV couplings are $\mathcal{O}(10^{-9})$ for the $Z$ couplings to $cu$ and $sd$, $\mathcal{O}(10^{-7})$ for $bd$, $\mathcal{O}(10^{-6})$ for $bs$, and $\mathcal{O}(10^{-3})$ for $tu$ and $tc$. Overall, low-energy flavor experiments provide significantly stronger constraints on these FV couplings than current collider searches.

arXiv comment12 pages, 4 figures & matches the published version

References in corpus (44)

• 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
• Dimension-Six Terms in the Standard Model Lagrangian
• Higgs mass and vacuum stability in the Standard Model at NNLO
• The Standard Model as an Effective Field Theory
• Flavor Violating Higgs Decays
• Flavor Physics in the Randall-Sundrum Model: I. Theoretical Setup and Electroweak Precision Tests
• Improved Constraints on Z' Bosons from Electroweak Precision Data
• Delta F=2 Observables and Fine-Tuning in a Warped Extra Dimension with Custodial Protection
• Flavour-Changing Decays of a 125 GeV Higgs-like Particle
• Anatomy and Phenomenology of mu-tau Lepton Flavour Violation in the MSSM
• A minimal set of top-Higgs anomalous couplings
• Lepton flavor violating Z' explanation of the muon anomalous magnetic moment
• Higgs-dependent Yukawa couplings
• Probing lepton flavour violation with Higgs boson decays H-> li+lj
• Higgs Mediated FCNC's in Warped Extra Dimensions
• Composite Higgs-Mediated FCNC
• Electric Charge Quantization
• Lepton flavor violation in Higgs boson decays under the rare tau decay results
• Higgs-induced lepton flavor violation
• Modified Higgs branching ratios versus CP and lepton flavor violation
• $h\to \mu \tau$ at Hadron Colliders
• Measurement of the B${}_{\mathrm{S}}^0$ $\to$ ${\mu }^{+}{\mu }^{-}$ decay properties and search for the B${}^0$ $\to$ ${\mu }^{+}{\mu }^{-}$ decay in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Electroweak and Flavour Structure of a Warped Extra Dimension with Custodial Protection
• An improved determination of the width of the top quark
• Lepton flavour violating Higgs and tau to mu gamma
• Natural fermion mass hierarchy and new signals for the Higgs boson
• Precise Determination of the Z Resonance Parameters at LEP : Zedometry
• Electroweak Limits on Non-Universal Z' Bosons
• The Higgs Trilinear Coupling and the Scale of New Physics
• The Impact of Kaluza-Klein Fermions on Standard Model Fermion Couplings in a RS Model with Custodial Protection
• Higgs to mu tau Decay in Supersymmetry without R Parity
• The impact of lepton-flavor violating Z' bosons on muon g-2 and other muon observables
• LHC sensitivity to lepton flavour violating Z boson decays
• 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
• Higgs Coupling Measurements and the Scale of New Physics
• Bounding the $Z^{\prime }tc$ coupling from $D^0-\overline{D^0}$ mixing and single top production at the ILC
• Flavor violating Higgs and $Z$ decays at FCC-ee
• Lepton flavor violating $Z$-boson couplings from non-standard Higgs interactions
• Higgs mediated Double Flavor Violating top decays in Effective Theories
• Search for flavor-changing neutral-current couplings between the top quark and the $Z$ boson with proton-proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• The Scale of New Physics from the Higgs Couplings to $\gamma \gamma$ and $\gamma Z$
• Bounding the B_s -> gamma gamma decay from Higgs mediated FCNC transitions
• Quark models: What can they teach us?