Extracting information on the 0 upsilon beta beta decays from the 2 upsilon beta beta decays

Civitarese O; Suhonen J

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Extracting information on the 0 upsilon beta beta decays from the 2 upsilon beta beta decays

机译：从2个upsilon beta beta衰减中提取有关0个upsilon beta beta衰减的信息

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We have analyzed the relation between the two-neutrino (2v beta beta) and neutrinoless (0 nu beta beta) double beta decays of Ge-76, Se-82, Mo-100, and Cd-116. The relevant nuclear matrix elements have been calculated by using the proton-neutron quasiparticle random-phase approximation (pn-QRPA) with realistic two-body interactions. The dependence of the calculated matrix elements on the strength gpp of the particle-particle part of the proton-neutron two-body interaction is investigated. Recently a procedure was proposed where data on 2 nu beta beta-decay half-lives could be used to derive appropriate values of gpp for calculating the 0 nu beta beta-decay matrix elements. Following this procedure, we have determined the allowed values of gpp by including experimental errors of the measured 2 nu beta beta-decay half-lives and the uncertainties in the axial-vector coupling constant g(A). This set of gpp values is used to predict single-beta and 0 nu beta beta observables. Careful study of these observables points to serious shortcomings in the adopted procedure. (c) 2005 Elsevier B.V. All rights reserved.

机译：我们已经分析了Ge-76，Se-82，Mo-100和Cd-116的两个中微子（2v beta beta）和无中微子（0 nu beta beta）双beta衰变之间的关系。相关的核基质元素已通过使用具有现实两体相互作用的质子-中子准粒子随机相近似（pn-QRPA）进行了计算。研究了计算的矩阵元素对质子-中子两体相互作用粒子部分强度gpp的依赖性。最近，有人提出了一种程序，其中可以使用2 nu betaβ衰变半衰期的数据得出适当的gpp值，以计算0 nu betaβ衰变矩阵元素。按照此程序，我们通过包括2测得的2 nu betaβ衰变半衰期的实验误差以及轴向矢量耦合常数g（A）的不确定性，确定了gpp的允许值。这组gpp值用于预测可观察到的beta和0 nu beta beta。对这些可观察物的仔细研究表明所采用的程序存在严重缺陷。（c）2005 Elsevier B.V.保留所有权利。

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《Nuclear Physics, A: Journal Devoted to the Experimental Study of the Fundamental Constituents of Matter and Their Actions》 |2005年第4期|共20页
作者
Civitarese O; Suhonen J;
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正文语种 eng
中图分类原子核物理学、高能物理学;
关键词
double beta decay; quasiparticle random-phase approximation; nuclear matrix elements; multipole decomposition; DOUBLE-BETA-DECAY; RANDOM-PHASE-APPROXIMATION; NUCLEAR-MATRIX ELEMENTS; MO-100; STATES; SUPPRESSION; TABLES; EC;

机译：双β衰变;准粒子随机相逼近;核矩阵元素;多极分解;双BETA衰变;随机相逼近;核基质元素;MO-100;状态;抑制;表;EC;

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Extracting information on the 0 upsilon beta beta decays from the 2 upsilon beta beta decays

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