New Physics Contribution to Neutral Trilinear Gauge Boson Couplings

Abstract

We study the one loop new physics effects to the CP even triple neutral gauge boson vertices ${\gamma }^{\star }\gamma Z$, ${\gamma }^{\star }ZZ$, $Z^{\star }Z\gamma$ and $Z^{\star }ZZ$ in the context of Little Higgs models. We compute the contribution of the additional fermions in Littles Higgs model in the framework of direct product groups where $[SU(2)\times U(1){]}^2$ gauge symmetry is embedded in SU(5) global symmetry and also in the framework of simple group where $SU(N)\times U(1)$ gauge symmetry breaks down to $SU(2{)}_L\times U(1)$. We calculate the contribution of the fermions to these couplings when $T$ parity is invoked. In addition, we re-examine the MSSM contribution at the chosen point of SPS1a' and compare with the SM and Little Higgs models.

19 pages, 5 figures, 3 tables

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Cited by in corpus (6)

• On polarization parameters of spin-$1$ particles and anomalous couplings in $e^{+}{e}^{-}\to ZZ/Z\gamma$
• Anomalous triple gauge boson couplings in $ZZ$ production at the LHC and the role of $Z$ boson polarizations
• CP-odd contributions to the $Z{Z}^{\ast }\gamma$, $ZZ{\gamma }^{\ast }$, and $ZZ{Z}^{\ast }$ vertices induced by nondiagonal charged scalar boson couplings
• Search for Neutral Triple Gauge Couplings with $ZZ$ Production at Future Electron Positron Colliders
• 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