| Geometry of the effective Majorana neutrino mass in the 0νββ decay |
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| 引用本文： | 邢志忠,周也铃.Geometry of the effective Majorana neutrino mass in the 0νββ decay[J].中国物理 C,2015,39(1). |
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| 作者姓名： | 邢志忠 周也铃 |
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| 作者单位： | 1 Institute of High Energy Physics, Chinese Academy of Sciences, P.O. Box 918, Beijing 100049, China;;2 Center for High Energy Physics, Peking University, Beijing 100080, China |
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| 摘 要： | The neutrinoless double-beta (0νββ) decay is a unique process used to identify the Majorana nature of massive neutrinos, and its rate depends on the size of the effective Majorana neutrino mass <m>ee. We put forward a novel ‘coupling-rod’ diagram to describe <m>ee in the complex plane, by which the effects of the neutrino mass ordering and CP-violating phases on <m>ee are intuitively understood. We show that this geometric language allows us to easily obtain the maximum and minimum of |<m>ee|. It remains usable even if there is a kind of new physics contributing to <m>ee, and it can also be extended to describe the effective Majorana masses <m>eμ, <m>eτ, <m>μμ, <m>μτ and <m>ττ which may appear in some other lepton-number violating processes.
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| 关 键 词： | Majorana particles neutrino mass 0νββ decay |
| 收稿时间： | 2014-6-3 |
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