期刊
PHYSICAL REVIEW LETTERS
卷 126, 期 18, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.126.182502
关键词
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资金
- Office of Nuclear Physics, U.S. Department of Energy [DE-FG02-96ER40963, DE-FG02-97ER41019, DE-SC0008499]
- Oak Ridge National Laboratory (ORNL) [ERKBP57]
- Lawrence Livermore National Laboratory (LLNL) [SCW1579]
- National Research Council of Canada
- NSERC [SAPIN-2016-00033, PGSD3-535536-2019]
- LLNL [DE-AC52-07NA27344]
- U.S. Department of Energy [DE-AC05-00OR22725]
The study computes the nuclear matrix element for the neutrinoless double-beta decay of Ca-48 using coupled-cluster theory and nuclear interactions from chiral effective field theory. The results show a relatively small matrix element for Ca-48. Additionally, the nuclear matrix element for the two-neutrino double-beta decay of Ca-48 is calculated with a quenching factor deduced from recent two-body currents calculation.
We use coupled-cluster theory and nuclear interactions from chiral effective field theory to compute the nuclear matrix element for the neutrinoless double-beta decay of Ca-48. Benchmarks with the no-core shell model in several light nuclei inform us about the accuracy of our approach. For Ca-48 we find a relatively small matrix element. We also compute the nuclear matrix element for the two-neutrino double-beta decay of Ca-48 with a quenching factor deduced from two-body currents in recent ab initio calculation of the Ikeda sum rule in Ca-48 [Gysbers et al., Nat. Phys. 15, 428 (2019)].
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