0νββ-decay nuclear matrix elements in self-consistent Skyrme quasiparticle random phase approximation: uncertainty from pairing interaction

2023/02/09 by W. -L. Lv, Y. -F. Niu, Lv, W. -L. +9
Chemistry · Physics and Astronomy · #Advanced NMR Techniques and Applications #FOS: Physical sciences #Nuclear Theory (nucl-th) #Nuclear physics research studies #Particle physics theoretical and experimental studies

paper · pdf · doi:10.48550/arxiv.2302.04423

openalex publication_date 2023/02/09 · openalex created_date 2023/02/13 · openalex updated_date 2026/07/28

Abstract

The uncertainty in the nuclear matrix elements (NMEs) of 0νββ decay for ⁷⁶Ge, ⁸²Se, ¹²⁸Te, ¹³⁰Te, and ¹³⁶Xe in the self-consistent quasiparticle random phase approximation (QRPA) method is investigated by using eighteen Skyrme interactions supplemented with either a volume- or surface-type of pairing interactions. The NMEs for the isotopes concerned (except ¹³⁶Xe) are less sensitive to the particle-hole (ph) interactions, while strongly dependent on the employed isovector particle-particle (pp) pairing interactions even though the pairing strengths are optimized to the same pairing gap. The results indicate that a precise determination of the isovector pp pairing interaction in the Skyrme energy density functional is of importance to reduce the uncertainty in the NMEs within the QRPA framework.

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