Year: 2020
Type: article
Abstract: We compute nuclear matrix elements of neutrinoless double-$\ensuremath{\beta}$ decay mediated by light Majorana-neutrino exchange in the $A=6$ system. The goal is to benchmark two many-body approaches, the no-core shell model and the multireference in-medium similarity renormalization group (SRG). We use a SRG-evolved next-to-next-to-next-to-leading chiral order two-body potential for the nuclear interaction, and make the approximation that the isospin is conserved. We compare the results of the two approaches as a function of the cutoff on the many-body basis space. Although differences are seen in the predicted nuclear radii, the ground-state energies and neutrinoless double-$\ensuremath{\beta}$ decay matrix elements produced by the two approaches show significant agreement. We discuss the implications for calculations in heavier nuclei.
Source: Physical Review C
Language: English
Topic: Neutrino Physics Research
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: G122673668, G1286236842, ADVANCED AB INITIO METHODS FOR NUCLEAR STRUCTURE, G1677143136, ADVANCED AB INITIO METHODS FOR NUCLEAR STRUCTURE, G222768804, NUCLEAR THEORY WITH APPLICATIONS TO ASTROPHYSICS AND PARTICLE PHYSICS, NUCLEAR THEORY WITH APPLICATIONS TO ASTROPHYSICS AND PARTICLE PHYSICS, INTERMEDIATE/HIGH ENERGY NUCLEAR PHYSICS, G3083819904, RESEARCH IN INTERMEDIATE/HIGH ENERGY PHYSICS, G419881185, G42916606, NUCLEAR COMPUTATIONAL LOW ENERGY INITIATIVE (NUCLEI), INTERMEDIATE/HIGH ENERGY NUCLEAR PHYSICS, G4501827968, G491409662, G498139845, NUCLEAR COMPUTATIONAL LOW ENERGY INITIATIVE (NUCLEI), G5076365615, NUCLEAR THEORY FOR DOUBLE-BETA DECAY AND FUNDAMENTAL SYMMETRIES, NUCLEAR THEORY WITH APPLICATIONS TO ASTROPHYSICS AND PARTICLE PHYSICS, NUCLEAR THEORY FOR DOUBLE-BETA DECAY AND FUNDAMENTAL SYMMETRIES, G969889393
OpenAlex ID: W3040354593