Calculation of Gamow-Teller and two-neutrino double-
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 decay properties for 
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 and 
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Coraggio, L.; Angelis, Luca De; Fukui, Tokuro; Gargano, A.; Itaco, N.

doi:10.1103/physrevc.95.064324

Cited by 43 publications

(60 citation statements)

References 57 publications

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“…Note that the dimensionless transition matrix elements f |J µ |n n|J µ |i also control the 2νββ decay amplitude, through a different E n -dependent weighted sum [19]. The overlap matrix elements quickly die out for E n − E i > 10 MeV, as borne out in several explicit calculations using different many-body methods [64][65][66]. Therefore, recalling the scaling E n − E i ∼ k 2 F /m N we recover T usoft /T 0 ∼ 2 χ .…”

Section: The 0νββ Amplitudementioning

confidence: 99%

Neutrinoless double- β decay in effective field theory: The light-Majorana neutrino-exchange mechanism

et al. 2018

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We present the first chiral effective theory derivation of the neutrinoless double beta-decay nn → pp potential induced by light Majorana neutrino exchange. The effective-field-theory framework has allowed us to identify and parameterize short-and long-range contributions previously missed in the literature. These contributions can not be absorbed into parameterizations of the single nucleon form factors. Starting from the quark and gluon level, we perform the matching onto chiral effective field theory and subsequently onto the nuclear potential. To derive the nuclear potential mediating neutrinoless double beta-decay, the hard, soft and potential neutrino modes must be integrated out. This is performed through next-to-next-to-leading order in the chiral power counting, in both the Weinberg and pionless schemes. At next-to-next-to-leading order, the amplitude receives additional contributions from the exchange of ultrasoft neutrinos, which can be expressed in terms of nuclear matrix elements of the weak current and excitation energies of the intermediate nucleus. These quantities also control the two-neutrino double beta-decay amplitude. Finally, we outline strategies to determine the low-energy constants that appear in the potentials, by relating them to electromagnetic couplings and/or by matching to lattice QCD calculations.

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Section: The 0νββ Amplitudementioning

confidence: 99%

Neutrinoless double- β decay in effective field theory: The light-Majorana neutrino-exchange mechanism

et al. 2018

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“…Another calculation was conducted in the framework of the realistic shell model (referred to as realistic SM) [88]. Single-particle energies and the two-body effective interaction are determined via the V low-k approach from the CD-Bonn free nucleon-nucleon potential [85] with a cutoff momentum of = 2.6 fm −1 .…”

Section: B Shell-model Calculationsmentioning

confidence: 99%

High-spin structure in the transitional nucleus Xe131 : Competitive neutron and proton alignment in the vicinity of the N=82 shell closure

Kaya¹,

Vogt²,

Reiter³

et al. 2018

Phys. Rev. C

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The transitional nucleus 131 Xe is investigated after multinucleon transfer in the 136 Xe + 208 Pb and 136 Xe + 238 U reactions employing the high-resolution Advanced γ -Tracking Array (AGATA) coupled to the magnetic spectrometer PRISMA at the Laboratori Nazionali di Legnaro, Italy, and as an elusive reaction product in the fusion-evaporation reaction 124 Sn( 11 B,p3n) 131 Xe employing the High-efficiency Observatory for γ -Ray Unique Spectroscopy (HORUS) γ -ray array coupled to a double-sided silicon strip detector at the University of Cologne, Germany. The level scheme of 131 Xe is extended to 5 MeV. A pronounced backbending is observed at hω ≈ 0.4 MeV along the negative-parity one-quasiparticle νh 11/2 (α = −1/2) band. The results are compared to the high-spin systematics of the Z = 54 isotopes and the N = 77 isotones. Large-scale shell-model calculations employing the PQM130, SN100PN, GCN50:82, SN100-KTH, and a realistic effective interaction reproduce the experimental findings and provide guidance to elucidate the structure of the high-spin states. Further calculations in 129−132 Xe provide insight into the changing nuclear structure along the Xe chain towards the N = 82 shell

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“…As mentioned in the Introduction, we discuss here two cases, whose results have been partially reported in previous papers [10][11][12]. Our aim is to show the reliability of our approach as well as to illustrate some inconsistencies whose solution would require further investigations also from the experimental point of view.…”

Section: Resultsmentioning

confidence: 58%

“…In the present work, we report a few examples of our realistic shell-model calculations, which have partially discussed in previous papers [10][11][12]. In particular, we shall focus on very neutron-rich even-even tin isotopes with N > 82, from A = 134 to 140.…”

Section: Introductionmentioning

confidence: 97%

Realistic shell model and nuclei around ¹³²Sn

Gargano

Gregorio

2020

EPJ Web Conf.

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This contribution reports on a shell-model study of nuclei in the 132Sn region employing a realistic effective interaction derived from the CD-Bonn nucleon-nucleon potential renormalized through the use of the Vlow−k approach. We shall focus on some selected results for nuclei with a few valence particles and/or holes with respect to 132Sn, namely Sn isotopes with N > 82 and 130Te, which have, in part, been discussed in previous papers. Results are compared with experiments, and predictions that may provide guidance to future experiments are also discussed. It is the aim of this contribution to underline the importance of studying 132Sn neighbours to acquire a deep understanding of nuclear structure, that may be very useful also in other physics fields, and to show that the realistic shell model is a very effective tool to conduct these studies.

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Calculation of Gamow-Teller and two-neutrino double- β decay properties for Te130 and Xe136

Cited by 43 publications

References 57 publications

Neutrinoless double- β decay in effective field theory: The light-Majorana neutrino-exchange mechanism

Neutrinoless double- β decay in effective field theory: The light-Majorana neutrino-exchange mechanism

High-spin structure in the transitional nucleus Xe131 : Competitive neutron and proton alignment in the vicinity of the N=82 shell closure

Realistic shell model and nuclei around ¹³²Sn

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Calculation of Gamow-Teller and two-neutrino double- β decay properties for Te130 and Xe136

Cited by 43 publications

References 57 publications

Neutrinoless double- β decay in effective field theory: The light-Majorana neutrino-exchange mechanism

Neutrinoless double- β decay in effective field theory: The light-Majorana neutrino-exchange mechanism

High-spin structure in the transitional nucleus Xe131 : Competitive neutron and proton alignment in the vicinity of the N=82 shell closure

Realistic shell model and nuclei around 132Sn

Contact Info

Product

Resources

About

Realistic shell model and nuclei around ¹³²Sn