Parity and CP operations for Majorana neutrinos
Parity and CP operations for Majorana neutrinos
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马约拉纳中微子的宇称和CP操作
DOI：
10.1103/physrevd.102.105001
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发表时间：
2020
影响因子：
5
通讯作者：
Kazuo Fujikawa
中科院分区：
文献类型：
--
作者：
B. P. Abbott;H. Shinkai;LIGO-Virgo-KAGRA collaboration;Kazuo Fujikawa
费米子场的宇称变换律通常由“宇称“与本征值定义，而马约拉纳费米子场则要求“宇称“。这两个宇称定律的兼容性问题出现在一般的费米子数违反理论的一般类马约拉纳费米子出现。在标准模型推广的手征中微子构造的Majorana中微子的情况下，虽然和分别破缺，但Majorana中微子可以用对称性来表征。然后表明，无论是选择的奇偶操作，或在水平的起始费米子产生一致的和物理上等效的描述紧急马约拉纳中微子的温伯格的中微子模型和一般类的跷跷板模型。这种等价的机制是由一个手征中微子构造的Majorana中微子，满足经典的Majorana条件，允许相位自由。这解释了相位来自于不同的宇称定义，并确保了对称性定义的一致性。
The parity transformation law of the fermion fieldis usually defined by the “parity”with eigenvalues, while the “parity”is required for the Majorana fermion. The compatibility issues of these two parity laws arise in generic fermion number violating theories where a general class of Majorana fermions appear. In the case of Majorana neutrinos constructed from chiral neutrinos in an extension of the Standard Model, the Majorana neutrinos can be characterized bysymmetry althoughandare separately broken. It is then shown that either choice of the parity operation,or, in the level of the starting fermions gives rise to the consistent and physically equivalent descriptions of emergent Majorana neutrinos both for Weinberg’s model of neutrinos and for a general class of seesaw models. The mechanism of this equivalence is that the Majorana neutrino constructed from a chiral neutrino, which satisfies the classical Majorana condition, allows the phase freedomwithor. This accounts for the phase coming from the different definitions of parity forand ensures the consistent definitions ofsymmetry.