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dc.contributor.authorGómez Cadenas, Juan José-
dc.contributor.authorMartín-Albo, Justo-
dc.contributor.authorSorel, Michel-
dc.contributor.authorFerrario, Paola-
dc.contributor.authorMonrabal, Francesc-
dc.contributor.authorMuñoz Vidal, Javier-
dc.contributor.authorNovella, Pau-
dc.contributor.authorPoves, Alfredo-
dc.identifier.citationJournal of Cosmology and Astroparticle Physics 06: 007 (2011)es_ES
dc.descriptionEl Pdf del artículo es la versión pre-print: arXiv:1010.5112v4es_ES
dc.description.abstractThe search for neutrinoless double beta decay is a very active field in which the number of proposals for next-generation experiments has proliferated. In this paper we attempt to address both the sense and the sensitivity of such proposals. Sensitivity comes first, by means of proposing a simple and unambiguous statistical recipe to derive the sensitivity to a putative Majorana neutrino mass, mββ. In order to make sense of how the different experimental approaches compare, we apply this recipe to a selection of proposals, comparing the resulting sensitivities. We also propose a ``physics-motivated range'' (PMR) of the nuclear matrix elements as a unifying criterium between the different nuclear models. The expected performance of the proposals is parametrized in terms of only four numbers: energy resolution, background rate (per unit time, isotope mass and energy), detection efficiency, and ββ isotope mass. For each proposal, both a reference and an optimistic scenario for the experimental performance are studied. In the reference scenario we find that all the proposals will be able to partially explore the degenerate spectrum, without fully covering it, although four of them (KamLAND-Zen, CUORE, NEXT and EXO) will approach the 50 meV boundary. In the optimistic scenario, we find that CUORE and the xenon-based proposals (KamLAND-Zen, EXO and NEXT) will explore a significant fraction of the inverse hierarchy, with NEXT covering it almost fully. For the long term future, we argue that 136Xe-based experiments may provide the best case for a 1-ton scale experiment, given the potentially very low backgrounds achievable and the expected scalability to large isotope masses.es_ES
dc.description.sponsorshipThe authors acknowledge support by the Spanish Ministry of Science and Innovation (MICINN) under grants CONSOLIDER-INGENIO 2010 CSD2008-0037 (CUP), FPA2009-13697-C04-04 and RYC-2008-03169.es_ES
dc.publisherInstitute of Physics Publishinges_ES
dc.subjectNeutrino experimentses_ES
dc.subjectDouble beta decayes_ES
dc.subjectNeutrino propertieses_ES
dc.titleSense and sensitivity of double beta decay experimentses_ES
dc.description.peerreviewedPeer reviewedes_ES
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