0 nu beta beta and 2 nu beta beta nuclear matrix elements, quasiparticle random-phase approximation, and isospin symmetry restoration

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21670%2F13%3A00214714" target="_blank" >RIV/68407700:21670/13:00214714 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1103/PhysRevC.87.045501" target="_blank" >http://dx.doi.org/10.1103/PhysRevC.87.045501</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevC.87.045501" target="_blank" >10.1103/PhysRevC.87.045501</a>

Result language

angličtina

Original language name

0 nu beta beta and 2 nu beta beta nuclear matrix elements, quasiparticle random-phase approximation, and isospin symmetry restoration

Original language description

Within the quasiparticle random-phase approximation (QRPA) we achieve partial restoration of the isospin symmetry and hence fulfillment of the requirement that the 2 nu beta beta Fermi matrix element M-F(2 nu) vanishes, as it should, unlike in the previous version of the method. This is accomplished by separating the renormalization parameter g(pp) of the particle-particle proton-neutron interaction into isovector and isoscalar parts. The isovector parameter g(pp)(T=1) needs to be chosen to be essentially equal to the pairing constant g(pair), so no new parameter is needed. For the 0 nu beta beta decay the Fermi matrix element M-F(0 nu) is substantially reduced, while the full matrix element M-0 nu is reduced by approximate to 10%. We argue that this more consistent approach should be used from now on in the proton-neutron QRPA and in analogous methods

Czech name

—

Czech description

—

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BG - Nuclear, atomic and molecular physics, accelerators

OECD FORD branch

—

Project

<a href="/en/project/LM2011027" target="_blank" >LM2011027: Project LSM/ULISSE ? contribution of the Czech Republic to the extension of the large research infrastructure of European importance (underground laboratory and construction of SuperNEMO experiment, continuation of the Czech participation)</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2013

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Physical Review C

ISSN

0556-2813

e-ISSN

—

Volume of the periodical

87

Issue of the periodical within the volume

4

Country of publishing house

US - UNITED STATES

Number of pages

9

Pages from-to

—

UT code for WoS article

000317196100003

EID of the result in the Scopus database

—