Comparison between variational Monte Carlo and shell model calculations of neutrinoless double beta decay matrix elements in light nuclei

Comparison between variational Monte Carlo and shell model calculations of neutrinoless double beta decay matrix elements in light nuclei
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轻核中无中微子双β衰变矩阵元的变分蒙特卡罗与壳模型计算比较

DOI:
10.1016/j.physletb.2019.134974
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发表时间:
2019-06
期刊:
影响因子:
4.4
通讯作者:
R.B.Wiringa
R.B.Wiringa
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Xiao Bao Wang;A.C.Hayes;J.Carlson;G.X.Dong;E.Mereghetti;S.Pastore;R.B.Wiringa

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多体方法之间的基准比较进行评估准确计算的中微子双β衰变矩阵元素所需的成分。对A= 10和12核进行了壳模型和变分蒙特卡罗(VMC)计算。不同的变分波函数被用来评估在从头计算的不确定性,发现相当小的差异之间的VMC双β衰变矩阵元素。对于壳模型计算,模型空间截断,径向波函数的选择,和短程相关的作用进行了研究,发现都是重要的。基于VMC和壳模型方法之间的详细比较,我们得出结论,准确的描述中微子双β衰变矩阵元素需要适当的治疗长程和短程相关。
Benchmark comparisons between many-body methods are performed to assess the ingredients necessary for an accurate calculation of neutrinoless double beta decay matrix elements. Shell model and variational Monte Carlo (VMC) calculations are carried out for A= 10 and 12 nuclei. Different variational wavefunctions are used to evaluate the uncertainties in the ab initio calculations, finding fairly small differences between the VMC double beta decay matrix elements. For shell model calculations, the role of model space truncation, radial wavefunction choices, and short-range correlation are investigated and all found to be important. Based on the detailed comparisons between the VMC and shell model approaches, we conclude that accurate descriptions of neutrinoless double beta decay matrix elements require a proper treatment of both long-range and short-range correlations.
DOI: 10.1155/2012/857016
发表时间: 2012-12
影响因子: 1.7
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