Journal
PHYSICS LETTERS B
Volume 633, Issue 1, Pages 93-97Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2005.11.048
Keywords
neutrinoless double-beta decay; neutrino
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A simple and precise method is presented to compare contributions to neutrinoless double-beta decay (0v beta beta-decay) from heavy particle exchange and light Majorana neutrino exchange. This procedure makes no assumptions about the momentum transfer between the two nucleons involved in the 0v beta beta-decay process. It is shown that for a general particle physics model, the characteristic 0v beta beta-decay scale > 4.4 TeV when all the coupling constants are assumed to be natural and of O(1). (c) 2005 Elsevier B.V. All rights reserved.
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