Suppression of the neutrinoless ββ decay?

Tomoda, T.; Faessler, Amand

doi:10.1016/0370-2693(87)91612-1

Cited by 181 publications

(64 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…GT [10][11][12] Very recently the two neutrino mode has been studied in the Shell Model Monte Carlo method (SMMC) [13] [14] that makes it possible to carry the calculations in an ordinary workstation. Similar importance has the development of a minimal phenomenological treatment of the realistic interactions in order to cure their bad saturation properties [15].…”

mentioning

confidence: 99%

Shell Model Studies of the Double Beta Decays of76Ge,82Se, and<

et al. 1996

View full text Add to dashboard Cite

mentioning

confidence: 99%

Shell Model Studies of the Double Beta Decays of76Ge,82Se, and<

et al. 1996

View full text Add to dashboard Cite

“…The calculation of the 0νββ-decay matrix elements is based on some approximation schemes, from which the Quasiparticle Random Phase Approximation (QRPA) is the most prominent one [5]- [8], despite an uncertainty in the calculation of the nuclear matrix element, which is related to its sensitivity on the renormalization of the particle-particle component of the residual interaction. Thus in the framework of proton-neutron QRPA (pn-QRPA) using the zero range delta-force Engel et al [6] have found a strong suppression of the 0νββ-decay matrix elements by introducing short-range correlations, whereas Tomoda et al [5] and Muto et al [7] by using a more realistic effective NN interaction arrived at the opposite conclusion.…”

mentioning

confidence: 99%

“…Thus in the framework of proton-neutron QRPA (pn-QRPA) using the zero range delta-force Engel et al [6] have found a strong suppression of the 0νββ-decay matrix elements by introducing short-range correlations, whereas Tomoda et al [5] and Muto et al [7] by using a more realistic effective NN interaction arrived at the opposite conclusion.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Non-collapsing renormalized QRPA with proton-neutron pairing for neutrinoless double beta decay

et al. 1997

Self Cite

View full text Add to dashboard Cite

Using the renormalized quasiparticle random phase approximation (RQRPA), we calculate the light neutrino mass mediated mode of neutrinoless double beta decay (0νββ-decay) of 76 Ge, 100 M o, 128 T e and 130 T e. Our results indicate that the simple quasiboson approximation is not good enough to study the 0νββ-decay, because its solutions collapse for physical values of g pp . We find that extension of the Hilbert space and inclusion of the Pauli Principle in the QRPA with proton-neutron pairing, allows us to extend our calculations beyond the point of collapse, for physical values of the nuclear force strength.

show abstract

“…[16] on the 0 + → 0 + decay of 76 Ge using the nuclear matrix elements of [17] are | λ | < 3.8 × 10 −7 , | η | < 2.2 × 10 −9 and | m ν | < 0.19 eV. Comparing these limits with those of Table 4, we notice the considerable difference in the absolute sensitivities between the 0 + → 0 + and 0 + → 2 + decays, which reflects the smaller Q-value as well as the higher electron partial waves associated with the latter.…”

mentioning

confidence: 99%

0+→2+ 0νββ decay triggered directly by the Majorana neutrino mass

Tomoda

2000

Physics Letters B

Self Cite

View full text Add to dashboard Cite

We treat 0 + → 2 + 0νββ decays taking into account recoil corrections to the nuclear currents. The decay probability can be written as a quadratic form of the effective coupling constants of the right-handed leptonic currents and the effective neutrino mass. We calculate the nuclear matrix elements for the 0 + → 2 + 1 0νββ decays of 76 Ge and 100 Mo, and demonstrate that the relative sensitivities of 0 + → 2 + decays to the neutrino mass and the right-handed currents are comparable to those of 0 + → 0 + decays.The neutrinoless double beta (0νββ) decay can take place through an exchange of neutrino between two quarks in nulei if the electron neutrino is a Majorana particle and has a nonvanishing mass and/or right-handed couplings [1-3]. There may be other possible mechanisms such as those involving supersymmetric particles which also cause the decay of two neutrons into two protons and two electrons [4][5][6]. In the present work, however, we restrict ourselves to the conventional two-nucleon and ∆ mechanisms of 0νββ decay through light Majorana neutrino exchange. From the analises of experimental data on 0 + → 0 + 0νββ decays, stringent limits on the effective neutrino mass and the effective coupling constants of the right-handed leptonic currents have been deduced (see e.g. [3,7] and the references quoted therein). On the other hand it still seems to be believed widely that 0 + → 2 + 0νββ decays are sensitive only to the right-handed currents. In view of the theorem that the electron neutrino should have a nonvanishing Majorana mass if 0νββ decay occurs anyway [8][9][10], an observation of 0νββ decay due to right-handed interactions would certainly mean also a nonvanishing Majorana mass of the electron neutrino.

show abstract

Suppression of the neutrinoless ββ decay?

Cited by 181 publications

References 14 publications

Shell Model Studies of the Double Beta Decays of76Ge,82Se, and<

Shell Model Studies of the Double Beta Decays of76Ge,82Se, and<

Non-collapsing renormalized QRPA with proton-neutron pairing for neutrinoless double beta decay

0+→2+ 0νββ decay triggered directly by the Majorana neutrino mass

Contact Info

Product

Resources

About