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Title: The contribution of light Majorana neutrinos to neutrinoless double beta decay and cosmology

Cosmology is making impressive progress and it is producing stringent bounds on the sum of the neutrino masses Σ, a parameter of great importance for the current laboratory experiments. In this letter, we exploit the potential relevance of the analysis of Palanque-Delabrouille et al. to the neutrinoless double beta decay (0νββ) search. This analysis indicates small values for the lightest neutrino mass, since the authors find Σ<84 meV at 1σ C.L., and provides a 1σ preference for the normal hierarchy. The allowed values for the Majorana effective mass, probed by 0νββ, turn out to be <75 meV at 3σ C.L. and lower down to less than 20 meV at 1σ C.L. . If this indication is confirmed, the impact on the 0νββ experiments will be tremendous since the possibility of detecting a signal will be out of the reach of the next generation of experiments.
Authors:
;  [1] ;  [2] ;  [3] ;  [4] ;  [3]
  1. INFN, Gran Sasso Science Institute,Viale F. Crispi 7, 67100 L’Aquila (Italy)
  2. INAF, Osservatorio Astronomico di Trieste,Via G.B. Tiepolo 11, 34131 Trieste (Italy)
  3. (Italy)
  4. INFN, Laboratori Nazionali del Gran Sasso,Via G. Acitelli 22, 67100 Assergi (AQ) (Italy)
Publication Date:
OSTI Identifier:
22458413
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2015; Journal Issue: 12; Other Information: PUBLISHER-ID: JCAP12(2015)023; OAI: oai:repo.scoap3.org:13015; Article funded by SCOAP3. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 License. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.; Country of input: International Atomic Energy Agency (IAEA)
Sponsoring Org:
SCOAP3, CERN, Geneva (Switzerland)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COSMOLOGY; DOUBLE BETA DECAY; EFFECTIVE MASS; MAJORANA THEORY; MEV RANGE; NEUTRINOS; PROBES; SIGNALS