Employing the projected-Hartree-Fock-Bogoliubov (PHFB) approach, nuclear transition matrix elements (NTMEs) have been calculated to study the three complementary modes of β-β- decay, namely two neutrino β-β- (2νβ-β-) decay, neutrinoless β-β- (0νβ-β-) decay within mass mechanism and Majoron accompanied 0νβ-β- (0νβ-β-χ) decay. Reliability of HFB wave functions generated with four different parametrizations of the pairing plus multipolar type of effective two-body interaction has been ascertained by comparing a number of nuclear observables with the available experimental data. Specifically, the calculated NTMEs M(2V) of 2νβ-β- decay have been compared with the observed data. Effects due to different parametrizations of effective two-body interactions, form factors and short-range correlations have been studied. It has also been observed that deformation plays a crucial role in the nuclear structure aspects of 0νβ-β- decay. Uncertainties in NTMEs calculated with wave functions generated with four different parametrizations of the pairing plus multipolar type of effective two-body interaction, dipole form factor and three different parametrizations of Jastrow type of short-range correlations within mechanisms involving light Majorana neutrinos, heavy Majorana neutrinos, sterile neutrinos and Majorons have been statistically estimated.
CITATION STYLE
Rath, P. K., Chandra, R., Chaturvedi, K., & Raina, P. K. (2019). Nuclear transition matrix elements for double-β decay within PHFB model. Frontiers in Physics. Frontiers Media SA. https://doi.org/10.3389/fphy.2019.00064
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