Anatomy of nuclear matrix elements for neutrinoless double-beta decay

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We show that, within the Quasiparticle Random Phase Approximation (QRPA) and the renormalized QRPA (RQRPA) based on the Bonn CD nucleon-nucleon interaction, the competition between the pairing and the neutron-proton particle-particle and particle-hole interactions causes contributions to the neutrinoless double-beta decay matrix element to nearly vanish at internucleon distances of more than 2 or 3 fermis. As a result, the matrix element is more sensitive to short-range/high-momentum physics than one naively expects. We analyze various ways of treating that physics and quantify the uncertainty it produces in the matrix elements, with three different treatments of short-range correlations.
Version to appear in Phys. Rev. C

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Nuclear Theory

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http://salesiana.dossiersoluciones.com/handle/123456789/191276

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0710.2055
 http://arxiv.org/abs/0710.2055
 Phys.Rev.C77:045503,2008
 doi:10.1103/PhysRevC.77.045503

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arXiv