Contributions to $ZZ{V}^{\ast }$ ($V=\gamma ,Z,Z^{\prime }$) couplings from $CP$ violating flavor changing couplings

Abstract

The one-loop contributions to the trilinear neutral gauge boson couplings $ZZ{V}^{\ast }$ ($V=\gamma ,Z,Z^{\prime }$), parametrized in terms of one $CP$-conserving $f_5^V$ and one $CP$-violating $f_4^V$ form factors, are calculated in models with $CP$-violating flavor changing neutral current couplings mediated by the $Z$ gauge boson and an extra neutral gauge boson $Z^{\prime }$. Analytical results are presented in terms of both Passarino-Veltman scalar functions and closed form functions. Constraints on the vector and axial couplings of the $Z$ gauge boson $\left|g_{VZ}^{tu}\right|<0.0096$ and $\left|g_{VZ}^{tc}\right|<0.011$ are obtained from the current experimental data on the $t\to Zq$ decays. It is found that in the case of the $ZZ{\gamma }^{\ast }$ vertex the only non-vanishing form factor is $f_5^{\gamma }$, which can be of the order of $10^{-3}$, whereas for the $ZZ{Z}^{\ast }$ vertex both form factors $f_5^Z$ and $f_4^Z$ are non-vanishing and can be of the order of $10^{-6}$ and $10^{-5}$, respectively. Our estimates for $f_5^{\gamma }$ and $f_5^Z$ are smaller than those predicted by the standard model, where $f_4^Z$ is absent up to the one loop level. We also estimate the $ZZ{Z^{\prime }}^{\ast }$ form factors arising from both diagonal and non-diagonal $Z^{\prime }$ couplings within a few extension models. It is found that in the diagonal case $f_5^{Z^{\prime }}$ is the only non-vanishing form factor and its real and imaginary parts can be of the order of $10^{-1}-10^{-2}$ and $10^{-2}-10^{-3}$, respectively, with the dominant contributions arising from the light quarks and leptons. In the non-diagonal case $f_5^{Z^{\prime }}$ can be of the order of $10^{-4}$, whereas $f_4^{Z^{\prime }}$ can reach values as large as $10^{-7}-10^{-8}$, with the largest contributions arising from the $Z^{\prime }tq$ couplings.

References in corpus (58)

• Automatized One-Loop Calculations in 4 and D dimensions
• New Developments in FeynCalc 9.0
• Collier: a fortran-based Complex One-Loop LIbrary in Extended Regularizations
• Little Higgs Models and Their Phenomenology
• The role of polarized positrons and electrons in revealing fundamental interactions at the Linear Collider
• Phenomenology of non-standard Z couplings in exclusive semileptonic b -> s transitions
• Supersymmetric contributions to rare kaon decays: beyond the single mass-insertion approximation
• Signatures of the anomalous $Z\gamma$ and ZZ production at the lepton and hadron Colliders
• A basis of dimension-eight operators for anomalous neutral triple gauge boson interactions
• Probing the Scale of New Physics in the $ZZ\gamma$ Coupling at $e^{+}{e}^{-}$ Colliders
• Search for the lepton flavor violating decay $Z\to e\mu$ in pp collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector
• Phenomenology of the 3-3-1-1 model
• Upper Bounds on $K\to \pi \nu \bar{\nu }$ and $K_L\to {\pi }^0{e}^{+}{e}^{-}$ from ${\epsilon }^{\prime }/\epsilon$ and $K_L\to {\mu }^{+}{\mu }^{-}$
• $ZZ\to {\ell }^{+}{\ell }^{-}{\ell }^{\prime +}{\ell }^{\prime -}$ cross-section measurements and search for anomalous triple gauge couplings in 13 TeV $pp$ collisions with the ATLAS detector
• New and Standard Physics contributions to anomalous Z and gamma self-couplings
• Single Top-Quark Production in Flavor-Changing Z' Models
• Universality-Breaking Effects in Leptonic Z Decays
• A search for flavour changing neutral currents in top-quark decays in pp collision data collected with the ATLAS detector at sqrt(s) = 7 TeV
• The minimal 3-3-1 model with only two Higgs triplets
• Measurements of pp $\to$ ZZ production cross sections and constraints on anomalous triple gauge couplings at $\sqrt{s}=$ 13 TeV
• A multi-dimensional search for new heavy resonances decaying to boosted WW, WZ, or ZZ boson pairs in the dijet final state at 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
• On polarization parameters of spin-$1$ particles and anomalous couplings in $e^{+}{e}^{-}\to ZZ/Z\gamma$
• Measurements of the ZZ production cross sections in the 2 l 2 nu channel in proton-proton collisions at sqrt(s) = 7 and 8 TeV and combined constraints on triple gauge couplings
• Anomalous triple gauge boson couplings in $ZZ$ production at the LHC and the role of $Z$ boson polarizations
• Limits on Anomalous Trilinear Gauge Couplings in Zgamma Events from ppbar Collisions at sqrt{s} = 1.96 TeV
• New physics effects on the CP asymmetries in B -> phi K_S and B -> eta' K_S decays
• On the choice of beam polarization in $e^{+}{e}^{-}\to ZZ/Z\gamma$ and anomalous triple gauge-boson couplings
• Studies of Gauge Boson Pair Production and Trilinear Couplings
• Trilinear Neutral Gauge Boson Couplings in Effective Theories
• Study of Triple-Gauge-Boson Couplings ZZZ, ZZgam and Zgamgam at LEP
• Search for Trilinear Neutral Gauge Boson Couplings in Z-gamma production at sqrt(s)=189GeV at LEP
• Implications of the non-universal Z boson in FCNC mediated rare decays
• Measurement of the $ZZ$ production cross section in $pp$ collisions at $\sqrt{s}$ = 8 TeV using the $ZZ\to {\ell }^{-}{\ell }^{+}{\ell }^{\prime -}{\ell }^{\prime +}$ and $ZZ\to {\ell }^{-}{\ell }^{+}\nu \bar{\nu }$ channels with the ATLAS detector
• Trilinear Neutral Gauge Boson Couplings
• $ZZ\gamma$ and $Z\gamma \gamma$ anomalous couplings in $\gamma p$ collision at the LHC
• Lepton flavor violation in the Simplest Little Higgs model
• Ansatz for small FCNC with a non-universal $Z^{\prime }$
• Bounding the $Z^{\prime }tc$ coupling from $D^0-\overline{D^0}$ mixing and single top production at the ILC
• CP violation in 2HDM and EFT: the ZZZ vertex
• Effect of FCNC mediated Z boson on lepton flavor violating decays
• Search for $t{Z}^{\prime }$ associated production induced by $tc{Z}^{\prime }$ couplings at the LHC
• New Physics in $e^{+}{e}^{-}\to Z\gamma$ at the ILC with polarized beams: Explorations beyond conventional anomalous triple gauge boson coupling
• Flavor changing Z' couplings at the LHC
• Isolating CP-violating γZZ coupling in e+e- \to γZ with transverse beam polarizations
• Search for lepton-flavor-violating decays of the $Z$ boson into a $\tau$ lepton and a light lepton with the ATLAS detector
• Fingerprinting the Top quark FCNC via anomalous $Ztq$ couplings at the LHeC
• Study of the lepton flavor-violating $Z^{\prime }\to \tau \mu$ decay
• Search for Top Quark FCNC Couplings in Z' Models at the LHC and CLIC
• Probing the ZZgamma and Zgammagamma Couplings Through the Process e+e- --> nu anti-nu gamma
• $ZZ\gamma$ and $Z\gamma \gamma$ couplings at linear $e^{+}{e}^{-}$ collider energies with the effects of Z polarization and initial state radiation
• Effects of Family Nonuniversal Z' Boson on Leptonic Decays of Higgs and Weak Bosons
• Anomalous neutral gauge boson interactions and simplified models
• b -> s Decays in a model with Z-mediated flavor changing neutral current
• On the Experimental Effects of the Off-shell Structure in Anomalous Neutral Triple Gauge Vertices
• Radiative decays Z_H-> V_i Z (V_i=γ, Z) in little Higgs models
• CP-odd contributions to the $Z{Z}^{\ast }\gamma$, $ZZ{\gamma }^{\ast }$, and $ZZ{Z}^{\ast }$ vertices induced by nondiagonal charged scalar boson couplings
• Radiative decay Z_H-> γA_H in the little Higgs model with T-parity

Cited by in corpus (13)

• Probing anomalous $ZZ\gamma$ and $Z\gamma \gamma$ Couplings at the $e^{+}{e}^{-}$ Colliders using Optimal Observable Technique
• Using a nested anomaly detection machine learning algorithm to study the neutral triple gauge couplings at an \texorpdfstring{$e^{+}{e}^{-}$}{e+e-} collider
• Optimal estimation of Dimension-8 Neutral Triple Gauge Couplings at $e^{+}{e}^{-}$ Colliders
• Model-independent study on the anomalous $ZZ\gamma$ and $Z\gamma \gamma$ couplings at the future muon collider
• A new evaluation of the $HZZ$ coupling: direct bounds on anomalous contributions and $CP$ violating effects via a new asymmetry
• Search for the limits on anomalous neutral triple gauge couplings via $ZZ$ production in the $\ell \ell \nu \nu$ channel at FCC-hh
• Polarized and unpolarized off-shell $H^{\ast }\to ZZ\to 4\ell$ decay above the $2m_Z$ threshold
• $H\to Z\gamma$ decay and $CP$ violation
• $CP$ violation in the $HZZ$ vertex and left-right asymmetries
• Non-diagonal contributions to $Z\gamma V^{\ast }$ vertex, polarizations and bounds on $Z\overline{t}q$ couplings
• Search for the anomalous $ZZZ$ and $ZZ\gamma$ gauge couplings through the process $e^{+}{e}^{-}\to ZZ$ with unpolarized and polarized beams
• Probing triple-gauge couplings in anomalous gauge theories at hadron and lepton colliders
• $CP$-odd form factor in the $HWW$ vertex