Neutral triple gauge boson production in the large extra dimensions model at linear colliders

Abstract

We consider the neutral triple-gauge boson production process in the context of large extra dimensions (LED) models including the Kaluza-Klein (KK) excited gravitons at future linear colliders, say ILC(CLIC). We consider $\ensuremath{\gamma}\ensuremath{\gamma}\ensuremath{\gamma}$, $\ensuremath{\gamma}\ensuremath{\gamma}Z$, $\ensuremath{\gamma}ZZ$, and $ZZZ$ production processes, and analyze their impacts on both the total cross section and some key distributions. These processes are important for new physics searches at linear colliders. Our results show that KK graviton exchange has the most significant effect on ${e}^{\ensuremath{-}}{e}^{+}\ensuremath{\rightarrow}\ensuremath{\gamma}ZZ$ among the four processes with relatively small ${M}_{S}$, while it has the largest effect on ${e}^{\ensuremath{-}}{e}^{+}\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\gamma}\ensuremath{\gamma}$ with larger ${M}_{S}$. By using the neutral triple-gauge boson production we could set the discovery limit on the fundamental Plank scale ${M}_{S}$ up to around 6--9 TeV for $\ensuremath{\delta}=4$ at the 3 TeV CLIC.