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Author Hirsch, Martin
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword NUCLEAR PHYSICS AND RADIATION PHYSICS ♦ CERN LHC ♦ DECAY AMPLITUDES ♦ DOUBLE BETA DECAY ♦ HALF-LIFE ♦ LEPTON NUMBER ♦ NEUTRINOS ♦ REST MASS
Abstract Lower limits on the half-life of neutrinoless double beta (0νββ) decay are usually interpreted as an upper limit on the effective Majorana neutrino mass. However, from a theoretical point of view 0νββ decay is an effective dimension-9 (ΔL = 2) operator, O{sub 0νββ}, for which the mass mechanism is only one possible realization. Any new physics model, which allows for lepton number violation (LNV), will contribute to the 0νββ decay amplitude. Here, after some preliminaries, I will discuss the general decomposition of O{sub 0νββ}. Most “exotic” contributions to 0νββ decay are of the so-called “short-range” type, i.e. involve heavy, electrically charged (and/or coloured) particles. Thus, current and future LHC data will put these exotic contributions to the test and either discover signals for LNV or rule out most cases as possible explanations of a hypothetical future signal of 0νββ decay.
ISSN 0094243X
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-07-15
Publisher Place United States
Volume Number 1666
Issue Number 1


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