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Correlations Between Neutrinoless Double-Beta, Double Gamow-Teller and Double-Magnetic Decays in the pnQRPA Framework
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We explore the relation between the nuclear matrix elements of neutrinoless double-beta (0 ) decay and two other processes: double Gamow-Teller (DGT) and double-magnetic-dipole ( 1 1) transitions, with focus on medium-mass to heavy nuclei studied with the proton-neutron quasiparticle random-phase approximation ( QRPA) framework. We explore a wide span of isoscalar proton-neutron pairing strengths covering the typical range of values that describe well - and two-neutrino -decay data. Our results indicate good linear correlations between 0 and both DGT and 1 1 matrix elements. Together with future measurements of DGT and 1 1 transitions, these correlations could help constrain the values of the 0 -decay nuclear matrix elements.
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JOKINIEMI, Lotta and MENÉNDEZ SÁNCHEZ, Javier. Correlations Between Neutrinoless Double-Beta, Double Gamow-Teller and Double-Magnetic Decays in the pnQRPA Framework. Physical Review C. 2023. Vol. 107, num. 1-13. ISSN 2469-9985. [consulted: 13 of August of 2026]. Available at: https://hdl.handle.net/2445/215801