<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>0</mml:mn><mml:mi>ν</mml:mi><mml:mi>β</mml:mi><mml:mi>β</mml:mi></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>2</mml:mn><mml:mi>ν</mml:mi><mml:mi>β</mml:mi><mml:mi>β</mml:mi></mml:mrow></mml:math>nuclear matrix elements in the interacting boson model with isospin restoration

Barea, J.; Kotila, J.; Iachello, F.

doi:10.1103/physrevc.91.034304

Cited by 349 publications

(425 citation statements)

References 53 publications

Supporting

Mentioning

413

Contrasting

Unclassified

Order By: Relevance

“…[28] where a partial isospin-restoration scheme for the pnQRPA was proposed. This same method was later used by Hyvärinen et al [29] for pnQRPA-based and in Barea et al [30] for IBM-2 based 0νββ-decay calculations.…”

Section: Introductionmentioning

confidence: 99%

Neutrinoless ββ nuclear matrix elements using isovector spin-dipole Jπ=2− data

et al. 2018

View full text Add to dashboard Cite

Ground-state-to-ground-state neutrinoless double-beta (0νββ) decays in nuclei of current experimental interest are revisited. In order to improve the reliability of the nuclear matrix element (NME) calculations for the light Majorana-neutrino mode, the NMEs are calculated by exploiting the newly available data on isovector spindipole (IVSD) J π = 2 − giant resonances. In order to correctly describe the IVSD up to and beyond the giantresonance region, the present computations are performed in extended no-core single-particle model spaces using the spherical version of the proton-neutron quasiparticle random-phase approximation (pnQRPA) with twonucleon interactions based on the Bonn one-boson-exchange G matrix. The appropriate short-range correlations, nucleon form factors, higher-order nucleonic weak currents, and partial restoration of the isospin symmetry are included in the calculations. The results are compared with earlier calculations of Hyvärinen and Suhonen [Phys. Rev. C 91, 024613 (2015)] performed in much smaller single-particle bases without access to the IVSD J π = 2 − giant-resonance data reported here.

show abstract

Section: Introductionmentioning

confidence: 99%

Neutrinoless ββ nuclear matrix elements using isovector spin-dipole Jπ=2− data

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Hence, in this two-stage fit the maximum amount of information on 2νββ decay can be utilized to produce an optimized model Hamiltonian for the description of the 0νββ decay. This two-step fit was later used in [64] for pnQRPAbased 0νββ-decay calculations and, about the same time, in [65] the isospin-restoration scheme was adopted for the IBM-2 ββ framework.…”

Section: Nuclear Model and The Two-stage Fitting Proceduresmentioning

confidence: 99%

Impact of the quenching of gA on the sensitivity of 0νββ experiments

Suhonen

2017

Phys. Rev. C

View full text Add to dashboard Cite

Detection of the neutrinoless ββ (0νββ) decay is of high priority in the particle-and neutrinophysics communities. The detectability of this decay mode is strongly influenced by the value of the weak axial-vector coupling constant gA. The recent nuclear-model analyses of β and ββ decays suggest that the value of gA could be dramatically quenched, reaching ratios of g free A /gA ≈ 4, where g free A = 1.27 is the free, neutron-decay, value of gA. The effects of this quenching appear devastating for the sensitivity of the present and future 0νββ experiments since the 4th power of this ratio scales the 0νββ half-lives. This, in turn, could lead to some two orders of magnitude less sensitivity for the 0νββ experiments. In the present article it is shown that by using a consistent approach to both the two-neutrino ββ and 0νββ decays by the proton-neutron quasiparticle random-phase approximation (pnQRPA), the feared two-orders-of-magnitude reduction in the sensitivity of the 0νββ experiments actually shrinks to a reduction by factors in the range 2 − 6. This certainly has dramatic consequences for the potential to detect the 0νββ decay.PACS numbers: 21.60.Jz, 23.40.Hc, 27.50.+e, 27.60.+j Keywords: Detectability of the neutrinoless double beta decay, nuclear matrix elements, quenching of the axial-vector coupling strength, sensitivity of the double-beta experiments

show abstract

“…These matrix elements were calculated using several methods including interacting shell model (ISM) [6-8, 10-12, 17] (see Ref. [7] for a review), quasiparticle random phase approximation (QRPA) [5,50], and interacting boson model (IBM) [51]. In general, the ISM results for M 0ν are quite close one to another, but smaller than the QRPA and IBM results; the ISM and IBM results for M 0N are close, while they are both smaller than the QRPA results.…”

Section: νββ Decay Formalismmentioning

confidence: 99%

Analysis of mechanisms that could contribute to neutrinoless double-beta decay

Horoi

Neacsu

2016

Phys. Rev. D

View full text Add to dashboard Cite

Neutrinoless double-beta decay, is a beyond the Standard Model process that would indicate that neutrinos are Majorana fermions and the lepton number is not conserved. It could be interesting to use the neutrinoless double-beta decay observations to distinguish between several beyond Standard Model mechanisms that could contribute to this process. Accurate nuclear structure calculations of the nuclear matrix elements necessary to analyze the decay rates could be helpful to narrow down the list of contributing mechanisms. We investigate the information one can get from the angular and energy distribution of the emitted electrons, and from the half-lives of several isotopes, assuming that the right-handed currents exist. For the analysis of these distributions we calculate the necessary nuclear matrix elements using shell model techniques, and we explicitly consider interference terms.

show abstract

0νββand2νββnuclear matrix elements in the interacting boson model with isospin restoration

Cited by 349 publications

References 53 publications

Neutrinoless ββ nuclear matrix elements using isovector spin-dipole Jπ=2− data

Neutrinoless ββ nuclear matrix elements using isovector spin-dipole Jπ=2− data

Impact of the quenching of gA on the sensitivity of 0νββ experiments

Analysis of mechanisms that could contribute to neutrinoless double-beta decay

Contact Info

Product

Resources

About