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Z boson pair production at LHC in a stabilized Randall-Sundrum scenario

Seong Chan Park·H. S. Song·Jeonghyeon Song
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Abstract

We study the Z boson pair production at LHC in the Randall-Sundrum scenario with the Goldberger-Wise stabilization mechanism. It is shown that comprehensive account of the Kaluza-Klein graviton and radion effects is crucial to probe the model: The KK graviton effects enhance the cross section of $g g \to Z Z$ on the whole so that the resonance peak of the radion becomes easy to detect, whereas the RS effects on the $q\bar{q} \to Z Z$ process are rather insignificant. The $p_T$ and invariant-mass distributions are presented to study the dependence of the RS model parameters. The production of longitudinally polarized Z bosons, to which the SM contributions are suppressed, is mainly due to KK gravitons and the radion, providing one of the most robust methods to signal the RS effects. The $1 σ$ sensitivity bounds on $(Λ_π, m_ϕ)$ with $k/M_{\rm Pl} =0.1$ are also obtained such that the effective weak scale $Λ_π$ of order 5 TeV can be experimentally probed.

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Seong Chan Park, H. S. Song, Jeonghyeon Song. 2001-12-17. Z boson pair production at LHC in a stabilized Randall-Sundrum scenario. https://doi.org/10.1103/physrevd.65.075008

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