Chiral two-body currents and neutrinoless double-? decay in the quasiparticle random-phase approximation

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21670%2F14%3A00225043" target="_blank" >RIV/68407700:21670/14:00225043 - isvavai.cz</a>
Result on the web
<a href="http://journals.aps.org/prc/abstract/10.1103/PhysRevC.89.064308" target="_blank" >http://journals.aps.org/prc/abstract/10.1103/PhysRevC.89.064308</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevC.89.064308" target="_blank" >10.1103/PhysRevC.89.064308</a>

Result language
angličtina
Original language name
Chiral two-body currents and neutrinoless double-? decay in the quasiparticle random-phase approximation
Original language description
We test the effects of an approximate treatment of two-body contributions to the axial-vector current on the quasiparticle random-phase approximation (QRPA) matrix elements for neutrinoless double-beta decay in a range of isotopes. The form and strengthof the two-body terms come from chiral effective-field theory. The two-body currents typically reduce the matrix elements by about 20%, not as much as in shell-model calculations. One reason for the difference is that standard practice in the QRPA is toadjust the strength of the isoscalar pairing interaction to reproduce two-neutrino double-beta decay lifetimes. Another may be the larger QRPA single-particle space. Whatever the reasons, the effects on neutrinoless decay are significantly less than those on two-neutrino decay, both in the shell model and the QRPA.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BG - Nuclear, atomic and molecular physics, accelerators
OECD FORD branch
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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)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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