Inverse neutrinoless double beta decay revisited: Neutrinos, Higgs triplets, and a muon collider

Werner Rodejohann
Phys. Rev. D 81, 114001 – Published 1 June 2010

Abstract

We revisit the process of inverse neutrinoless double beta decay (eeWW) at future linear colliders. The cases of Majorana neutrino and Higgs triplet exchange are considered. We also discuss the processes eμWW and μμWW, which are motivated by the possibility of muon colliders. For heavy neutrino exchange, we show that masses up to 106 (105)GeV could be probed for ee and eμ machines, respectively. The stringent limits for mixing of heavy neutrinos with muons render μμWW less promising, even though this process is not constrained by limits from neutrinoless double beta decay. If Higgs triplets are responsible for inverse neutrinoless double beta decay, observable signals are only possible if a very narrow resonance is met. We also consider unitarity aspects of the process in case both Higgs triplets and neutrinos are exchanged. An exact seesaw relation connecting low energy data with heavy neutrino and triplet parameters is found.

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  • Received 1 April 2010

DOI:https://doi.org/10.1103/PhysRevD.81.114001

©2010 American Physical Society

Authors & Affiliations

Werner Rodejohann*

  • Max-Planck-Institut für Kernphysik, Postfach 103980, D-69029 Heidelberg, Germany

  • *werner.rodejohann@mpi-hd.mpg.de

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Issue

Vol. 81, Iss. 11 — 1 June 2010

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