Extra dimensions and Seesaw Neutrinos at the International Linear Collider

Abstract

We study the capability of the international linear collider (ILC) to probe extra dimensions via the seesaw mechanism. In the scenario we study, heavy Kaluza-Klein neutrinos generate tiny neutrino masses and, at the same time, have sizable couplings to the standard-model particles. Consequently, a Kaluza-Klein tower of heavy neutrinos (N) can be produced and studied at the ILC through the process: e+e- -> vN followed by N -> Wl decay. We show that the single lepton plus two-jets final states with large missing energy from this signal process will provide a good opportunity to measure the masses and cross sections of Kaluza-Klein neutrinos up to the third level. Furthermore, the neutrino oscillation parameters can be extracted from the flavor dependence of the lowest-mode signals, which give us information about the origin of low-energy neutrino masses.

arXiv comment22 pages, 5 figures, 7 tables

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• Jet substructure shedding light on heavy Majorana neutrinos at the LHC
• Optimal search reach for heavy neutral leptons at a muon collider
• Heavy neutrinos at future linear e${}^{+}$e${}^{-}$ colliders
• Renormalization Group Running of the Neutrino Mass Operator in Extra Dimensions
• Pair production of heavy neutrinos in next-to-leading order QCD at the hadron colliders in the inverse seesaw framework
• LHC Signals for Singlet Neutrinos from a Natural Warped Seesaw (II)
• LHC signals for Singlet Neutrinos from a Natural Warped Seesaw (I)