期刊
PHYSICAL REVIEW C
卷 89, 期 6, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.89.064308
关键词
-
资金
- US Department of Energy [DE-FG02-97ER41019]
- VEGA Grant agency of the Slovak Republic [1/0876/12]
- Ministry of Education, Youth and Sports of the Czech Republic [LM2011027]
- U.S. Department of Energy (DOE) [DE-FG02-97ER41019] Funding Source: U.S. Department of Energy (DOE)
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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据