Engel, J. and Šimkovic, F. and Vogel, P. (2014) Chiral two-body currents and neutrinoless double-β decay in the quasiparticle random-phase approximation. Physical Review C, 89 (6). Art. No. 064308. ISSN 0556-2813. doi:10.1103/PhysRevC.89.064308. https://resolver.caltech.edu/CaltechAUTHORS:20140714-095222440
|
PDF
- Published Version
See Usage Policy. 394kB |
Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20140714-095222440
Abstract
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 strength of 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 to adjust 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.
| Item Type: | Article | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Related URLs: |
| |||||||||
| ORCID: |
| |||||||||
| Additional Information: | © 2014 American Physical Society. Published 13 June 2014; Received 30 March 2014; Revised 19 May 2014. This work was supported by the US Department of Energy through Contract No. DE-FG02-97ER41019. F. Š. acknowledges the support by the VEGA Grant agency of the Slovak Republic under theContract No. 1/0876/12 and by the Ministry of Education, Youth and Sports of the Czech Republic under Contract No. LM2011027. | |||||||||
| Funders: |
| |||||||||
| Issue or Number: | 6 | |||||||||
| Classification Code: | PACS number(s): 21.60.Jz, 23.40.Hc | |||||||||
| DOI: | 10.1103/PhysRevC.89.064308 | |||||||||
| Record Number: | CaltechAUTHORS:20140714-095222440 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20140714-095222440 | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 47163 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | Jason Perez | |||||||||
| Deposited On: | 14 Jul 2014 23:16 | |||||||||
| Last Modified: | 10 Nov 2021 17:35 |
Repository Staff Only: item control page
