Neutral Z boson pair production due to radion resonance in the Randall-Sundrum model: prospects at the CERN LHC
Prasanta Kumar Das
Abstract
The Neutral Z boson pair production due to radion resonance at the Large Hadron Collider (LHC) is an interesting process to explore the notion of warped geometry (Randall-Sundrum model). Because of the enhanced coupling of radion with a pair of gluons due to trace enomaly and top(quark) loop, the radion can provide larger event rate possibility as compared to any New Physics effect. Using the proper radion-top-antitop (with the quarks being off-shell) coupling, we obtain the correct radion production rate at LHC and explore several features of a heavier radion decaying into a pair of real Z bosons which subsequently decays into charged 4 l (l=e, μ) leptons (the gold-plated mode). Using the signal and background event rate, we obtain bounds on radion mass mϕ and radion vev at the 5σ, 10σ discovery level.
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