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

Seong Chan Park; H. S. Song; Jeonghyeon Song

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

Seong Chan Park, H. S. Song, Jeonghyeon Song

Department of Physics

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19 Citations (Scopus)

Abstract

We study the Z boson pair production at the CERN Large Hadron Collider in the Randall-Sundrum (RS) scenario with the Goldberger-Wise stabilization mechanism. It is shown that a comprehensive account of the Kaluza-Klein (KK) graviton and radion effects is crucial to probe the model: The KK graviton effects enhance the cross section of gg→ZZ on the whole so that the resonance peak of the radion becomes easy to detect, whereas the RS effects on the qq̄→ZZ 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 standard model 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 1σ sensitivity bounds on (Λ_π,m_φ) with k/M_PI = O.1 are also obtained such that the effective weak scale Λ_π of order 5 TeV can be experimentally probed.

Original language	English
Article number	075008
Pages (from-to)	750081-7500810
Number of pages	6750730
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	65
Issue number	7 B
Publication status	Published - 2002 Apr 1

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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Park, S. C., Song, H. S., & Song, J. (2002). Z boson pair production at CERN LHC in a stabilized Randall-Sundrum scenario. Physical Review D - Particles, Fields, Gravitation and Cosmology, 65(7 B), 750081-7500810. [075008].

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abstract = "We study the Z boson pair production at the CERN Large Hadron Collider in the Randall-Sundrum (RS) scenario with the Goldberger-Wise stabilization mechanism. It is shown that a comprehensive account of the Kaluza-Klein (KK) graviton and radion effects is crucial to probe the model: The KK graviton effects enhance the cross section of gg→ZZ on the whole so that the resonance peak of the radion becomes easy to detect, whereas the RS effects on the q{\=q}→ZZ process are rather insignificant. The pT 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 standard model 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 1σ sensitivity bounds on (Λπ,mφ) with k/MPI = O.1 are also obtained such that the effective weak scale Λπ of order 5 TeV can be experimentally probed.",

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N2 - We study the Z boson pair production at the CERN Large Hadron Collider in the Randall-Sundrum (RS) scenario with the Goldberger-Wise stabilization mechanism. It is shown that a comprehensive account of the Kaluza-Klein (KK) graviton and radion effects is crucial to probe the model: The KK graviton effects enhance the cross section of gg→ZZ on the whole so that the resonance peak of the radion becomes easy to detect, whereas the RS effects on the qq̄→ZZ process are rather insignificant. The pT 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 standard model 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 1σ sensitivity bounds on (Λπ,mφ) with k/MPI = O.1 are also obtained such that the effective weak scale Λπ of order 5 TeV can be experimentally probed.

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