A1 Journal article (refereed)
Comparison of Microscopic Interacting Boson Model and Quasiparticle Random Phase Approximation 0νββ Decay Nuclear Matrix Elements (2021)


Kotila, J. (2021). Comparison of Microscopic Interacting Boson Model and Quasiparticle Random Phase Approximation 0νββ Decay Nuclear Matrix Elements. Frontiers in Astronomy and Space Sciences, 8, Article 652180. https://doi.org/10.3389/fspas.2021.652180


JYU authors or editors


Publication details

All authors or editors: Kotila, Jenni

Journal or series: Frontiers in Astronomy and Space Sciences

eISSN: 2296-987X

Publication year: 2021

Publication date: 24/05/2021

Volume: 8

Article number: 652180

Publisher: Frontiers Media SA

Publication country: Switzerland

Publication language: English

DOI: https://doi.org/10.3389/fspas.2021.652180

Publication open access: Openly available

Publication channel open access: Open Access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/77104


Abstract

The fundamental nature of the neutrino is presently a subject of great interest. A way to access the absolute mass scale and the fundamental nature of the neutrino is to utilize the atomic nuclei through their rare decays, the neutrinoless double beta (0νββ) decay in particular. The experimentally measurable observable is the half-life of the decay, which can be factorized to consist of phase space factor, axial vector coupling constant, nuclear matrix element, and function containing physics beyond the standard model. Thus reliable description of nuclear matrix element is of crucial importance in order to extract information governed by the function containing physics beyond the standard model, neutrino mass parameter in particular. Comparison of double beta decay nuclear matrix elements obtained using microscopic interacting boson model (IBM-2) and quasiparticle random phase approximation (QRPA) has revealed close correspondence, even though the assumptions in these two models are rather different. The origin of this compatibility is not yet clear, and thorough investigation of decomposed matrix elements in terms of different contributions arising from induced currents and the finite nucleon size is expected to contribute to more accurate values for the double beta decay nuclear matrix elements. Such comparison is performed using detailed calculations on both models and obtained results are then discussed together with recent experimental results.


Keywords: particle physics; nuclear physics; standard model of particle physics

Free keywords: double beta decay; nuclear matrix element; microscopic interacting boson model; quasiparticle random phase approximation; physics beyond the standard model


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Ministry reporting: Yes

Reporting Year: 2021

JUFO rating: 1


Last updated on 2022-20-09 at 14:35