Impact of the leading-order short-range nuclear matrix element on the neutrinoless double-beta decay of medium-mass and heavy nuclei

We evaluate the leading-order short-range nuclear matrix element for the neutrinoless double-beta (0νββ) decay of the nuclei most relevant for experiments, including 76Ge, 100Mo, 130Te and 136Xe. In our calculations, performed with the nuclear shell model and proton-neutron quasiparticle random-phas...

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Autores principales:	Lotta Jokiniemi, Pablo Soriano, Javier Menéndez
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Neutrinoless double-beta decay Nuclear matrix elements Quasiparticle random-phase approximation Nuclear shell model Physics QC1-999
Acceso en línea:	https://doaj.org/article/d18b3fc1e08e48569c90ea8f2dcf99d1
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spelling	oai:doaj.org-article:d18b3fc1e08e48569c90ea8f2dcf99d12021-12-04T04:32:22ZImpact of the leading-order short-range nuclear matrix element on the neutrinoless double-beta decay of medium-mass and heavy nuclei0370-269310.1016/j.physletb.2021.136720https://doaj.org/article/d18b3fc1e08e48569c90ea8f2dcf99d12021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S0370269321006602https://doaj.org/toc/0370-2693We evaluate the leading-order short-range nuclear matrix element for the neutrinoless double-beta (0νββ) decay of the nuclei most relevant for experiments, including 76Ge, 100Mo, 130Te and 136Xe. In our calculations, performed with the nuclear shell model and proton-neutron quasiparticle random-phase approximation (pnQRPA) methods, we estimate the coupling of this term by the contact charge-independence-breaking coupling of various nuclear Hamiltonians. Our results suggest a significant impact of the short-range matrix element, which is about 15%−50% and 30%−80% of the standard 0νββ-decay long-range matrix element for the shell model and pnQRPA, respectively. Combining the full matrix elements with the results from current 0νββ-decay experiments we find that, if both matrix elements carry the same sign, these searches move notably toward probing the inverted mass ordering of neutrino masses.Lotta JokiniemiPablo SorianoJavier MenéndezElsevierarticleNeutrinoless double-beta decayNuclear matrix elementsQuasiparticle random-phase approximationNuclear shell modelPhysicsQC1-999ENPhysics Letters B, Vol 823, Iss , Pp 136720- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Neutrinoless double-beta decay Nuclear matrix elements Quasiparticle random-phase approximation Nuclear shell model Physics QC1-999
spellingShingle	Neutrinoless double-beta decay Nuclear matrix elements Quasiparticle random-phase approximation Nuclear shell model Physics QC1-999 Lotta Jokiniemi Pablo Soriano Javier Menéndez Impact of the leading-order short-range nuclear matrix element on the neutrinoless double-beta decay of medium-mass and heavy nuclei
description	We evaluate the leading-order short-range nuclear matrix element for the neutrinoless double-beta (0νββ) decay of the nuclei most relevant for experiments, including 76Ge, 100Mo, 130Te and 136Xe. In our calculations, performed with the nuclear shell model and proton-neutron quasiparticle random-phase approximation (pnQRPA) methods, we estimate the coupling of this term by the contact charge-independence-breaking coupling of various nuclear Hamiltonians. Our results suggest a significant impact of the short-range matrix element, which is about 15%−50% and 30%−80% of the standard 0νββ-decay long-range matrix element for the shell model and pnQRPA, respectively. Combining the full matrix elements with the results from current 0νββ-decay experiments we find that, if both matrix elements carry the same sign, these searches move notably toward probing the inverted mass ordering of neutrino masses.
format	article
author	Lotta Jokiniemi Pablo Soriano Javier Menéndez
author_facet	Lotta Jokiniemi Pablo Soriano Javier Menéndez
author_sort	Lotta Jokiniemi
title	Impact of the leading-order short-range nuclear matrix element on the neutrinoless double-beta decay of medium-mass and heavy nuclei
title_short	Impact of the leading-order short-range nuclear matrix element on the neutrinoless double-beta decay of medium-mass and heavy nuclei
title_full	Impact of the leading-order short-range nuclear matrix element on the neutrinoless double-beta decay of medium-mass and heavy nuclei
title_fullStr	Impact of the leading-order short-range nuclear matrix element on the neutrinoless double-beta decay of medium-mass and heavy nuclei
title_full_unstemmed	Impact of the leading-order short-range nuclear matrix element on the neutrinoless double-beta decay of medium-mass and heavy nuclei
title_sort	impact of the leading-order short-range nuclear matrix element on the neutrinoless double-beta decay of medium-mass and heavy nuclei
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/d18b3fc1e08e48569c90ea8f2dcf99d1
work_keys_str_mv	AT lottajokiniemi impactoftheleadingordershortrangenuclearmatrixelementontheneutrinolessdoublebetadecayofmediummassandheavynuclei AT pablosoriano impactoftheleadingordershortrangenuclearmatrixelementontheneutrinolessdoublebetadecayofmediummassandheavynuclei AT javiermenendez impactoftheleadingordershortrangenuclearmatrixelementontheneutrinolessdoublebetadecayofmediummassandheavynuclei
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Impact of the leading-order short-range nuclear matrix element on the neutrinoless double-beta decay of medium-mass and heavy nuclei

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