Double beta decay
Double beta decay
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DOI：
10.1088/0954-3899/24/12/001
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发表时间：
1998-12
期刊：
影响因子：
--
通讯作者：
A. Faessler;F. Šimkovic
中科院分区：
文献类型：
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作者：
A. Faessler;F. Šimkovic
本文综述了核双β衰变领域的最新进展，这是当前核物理和粒子物理学的一个重要课题。在中微子混合问题和标准模型的R宇称破坏超对称扩展的背景下，讨论了无中微子双β衰变(-衰变)中轻子数破坏的机制。讨论了双β衰变的双中微子和无中微子模式的核矩阵元的可靠确定问题。分析了不同近似方案在所考虑的核结构研究中的有效性，并强调了泡利不相容原理在正确处理核矩阵元方面的作用。根据目前最好的衰变半衰期实验极限，导出了不同轻子数破坏参数的约束条件，如有效电子中微子质量、有效右手弱相互作用参数、有效Majoron耦合常数和R宇称破坏SUSY参数。
We review the recent developments in the field of nuclear double beta decay, which is presently an important topic in both nuclear and particle physics. The mechanism of lepton number violation within the neutrinoless double beta decay (-decay) is discussed in the context of the problem of neutrino mixing and the R-parity violating supersymmetric extensions of the standard model. The problem of reliable determination of the nuclear matrix elements governing both two-neutrino and neutrinoless modes of the double beta decay is addressed. The validity of different approximation schemes in the considered nuclear structure studies is analysed and the role of the Pauli exclusion principle for a correct treatment of nuclear matrix elements is emphasized. The constraints on different lepton-number violating parameters such as effective electron neutrino mass, effective right-handed weak interaction parameters, effective Majoron coupling constant and R-parity violating SUSY parameters are derived from the best presently available experimental limits on the half-life of -decay.