New and Standard Physics contributions to anomalous Z and gamma self-couplings

Abstract

We examine the Standard and the New Physics (NP) contributions to the ZZZ, ZZgamma and Zgammagamma neutral gauge couplings. At the one-loop level, if we assume that there is no CP violation contained in NP beyond the Standard Model one, we find that only CP conserving neutral gauge couplings are generated, either from the standard quarks and leptons, or from possible New Physics (NP) fermions. Bosonic one-loop diagrams never contribute to these couplings, while the aforementioned fermionic contributions satisfy hZ3=-fgamma5, hZ4=hgamma4=0. We also study examples of two-loop NP effects that could generate non vanishing h4 couplings. We compare quantitative estimates from SM, MSSM and some specific examples of NP contributions, and we discuss their observability at future colliders.

20 pages and 9 figures. e-mail: [email protected]

References in corpus (5)

• Decays of the Lightest Top Squark
• Signatures of the anomalous $Z\gamma$ and ZZ production at the lepton and hadron Colliders
• Neutralino Decays at the CERN LHC
• Study of Z Boson Pair Production in e+e- Collisions at LEP at \sqrt{s}=189 GeV
• Large Higgs Boson Exchange Contribution in Three-Body Neutralino Decays

Cited by in corpus (48)

• Electroweak Measurements in Electron-Positron Collisions at W-Boson-Pair Energies at LEP
• Signatures of the anomalous $Z\gamma$ and ZZ production at the lepton and hadron Colliders
• Measurement of the pp to ZZ production cross section and constraints on anomalous triple gauge couplings in four-lepton final states at sqrt(s) = 8 TeV
• Logarithmic electroweak corrections to gauge-boson pair production at the LHC
• Multi-Boson Interactions at the LHC
• Probing Neutral Gauge Boson Self-interactions in ZZ Production at Hadron Colliders
• Measurements of the pp$\to$ZZ production cross section and the Z$\to 4\ell$ branching fraction, and constraints on anomalous triple gauge couplings at $\sqrt{s}=$ 13 TeV
• Measurements of pp $\to$ ZZ production cross sections and constraints on anomalous triple gauge couplings at $\sqrt{s}=$ 13 TeV
• On polarization parameters of spin-$1$ particles and anomalous couplings in $e^{+}{e}^{-}\to ZZ/Z\gamma$
• Anomalous triple-gauge-boson interactions in vector-boson pair production with RECOLA2
• 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
• 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
• Probing Neutral Triple Gauge Couplings at the LHC and Future Hadron Colliders
• Vector Fermion-Portal Dark Matter: Direct Detection and Galactic Center Gamma-Ray Excess
• Measurement of the $Z\gamma \to \nu \bar{\nu }\gamma$ production cross section in $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector and limits on anomalous triple gauge-boson couplings
• Measurement of $ZZ$ production in the $\ell \ell \nu \nu$ final state with the ATLAS detector in $pp$ collisions at $\sqrt{s}=13$ TeV
• Trilinear Neutral Gauge Boson Couplings in Effective Theories
• Measurement of the $Z(\to {\ell }^{+}{\ell }^{-})\gamma$ production cross-section in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• 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
• The processes $e^{-}{e}^{+}\to \gamma \gamma ,Z\gamma ,ZZ$ in SM and MSSM
• Trilinear Neutral Gauge Boson Couplings
• Limits on the quartic couplings $Z\gamma \gamma \gamma$ and $ZZ\gamma \gamma$ from $e^{+}{e}^{-}$ colliders
• Constraining CP violating operators in charged and neutral triple gauge couplings
• Top quark contribution to two-loop helicity amplitudes for $Z$ boson pair production in gluon fusion
• Contributions to $ZZ{V}^{\ast }$ ($V=\gamma ,Z,Z^{\prime }$) couplings from $CP$ violating flavor changing couplings
• Anomalous couplings in $Z\gamma$ events at NNLO+PS and improving $\nu \bar{\nu }\gamma$ backgrounds in dark-matter searches
• Heavy Fermion Non-Decoupling Effects in Triple Gauge Boson Vertices
• CP violating effects in the decay Z -> mu^+mu^-gamma induced by ZZgamma and Zgammagamma couplings
• CP violating anomalous couplings in $W\gamma$ and $Z\gamma$ production at the LHC
• Isolating CP-violating γZZ coupling in e+e- \to γZ with transverse beam polarizations
• Anomaly-matching and Higgs-less effective theories
• A new evaluation of the $HZZ$ coupling: direct bounds on anomalous contributions and $CP$ violating effects via a new asymmetry
• Probing the ZZgamma and Zgammagamma Couplings Through the Process e+e- --> nu anti-nu gamma
• Anomalous neutral gauge boson interactions and simplified models
• UV Completion of Neutral Triple Gauge Couplings
• On the Experimental Effects of the Off-shell Structure in Anomalous Neutral Triple Gauge Vertices
• Gauge boson couplings at LEP
• Beam polarization effects on Z-boson pair production at electron-positron colliders: a full one-loop analysis
• Polarized and unpolarized off-shell $H^{\ast }\to ZZ\to 4\ell$ decay above the $2m_Z$ threshold
• CP-odd contributions to the $Z{Z}^{\ast }\gamma$, $ZZ{\gamma }^{\ast }$, and $ZZ{Z}^{\ast }$ vertices induced by nondiagonal charged scalar boson couplings
• Constraints from Triple Gauge Couplings on Vectorlike Leptons
• Non-diagonal contributions to $Z\gamma V^{\ast }$ vertex, polarizations and bounds on $Z\overline{t}q$ couplings
• Search for Neutral Triple Gauge Couplings with $ZZ$ Production at Future Electron Positron Colliders
• $CP$ violation in the $HZZ$ vertex and left-right asymmetries
• Search for the anomalous $ZZZ$ and $ZZ\gamma$ gauge couplings through the process $e^{+}{e}^{-}\to ZZ$ with unpolarized and polarized beams
• Probing Neutral Triple Gauge Couplings via $ZZ$ Production at $e^{+}{e}^{-}$ Colliders with Machine Learning
• $CP$-odd form factor in the $HWW$ vertex