The Minimal Type-II Seesaw Model and Flavor-dependent Leptogenesis
The Minimal Type-II Seesaw Model and Flavor-dependent Leptogenesis
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最小 II 型跷跷板模型和风味依赖性轻体发生
DOI：
10.1142/s0217751x08042201
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
Z. Xing
中科院分区：
文献类型：
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作者：
S. Luo;Z. Xing
目前的实验数据允许中微子质量为零，即m（1）= 0或m（3）= 0.这一观察结果表明，从（a）m（1）= m（2）= 0和m（3）= 0或（B）m（1）= m（2）= 0和m（3）= 0的极限出发，可以建立真实的中微子质量织构.在这两种情况下，我们可以引入一个特定的微扰，以确保所得的中微子混合矩阵是三双峰混合模式或其可行的变化。我们发现，在只有一个重右手Majorana中微子N的最小II型跷跷板模型中，引入这种中微子质量矩阵是很自然的。我们证明了在m（3）= 0的情况下，可以通过热轻子生成来解释宇宙学重子数的不对称性，其中N衰变的CP破坏不对称性归因于电子味.
Current experimental data allow the zero value for one neutrino mass, either m(1) = 0 or m(3) = 0.This observation implies that a realistic neutrino mass texture can be established by starting from the limit (a) m(1) = m(2) = 0 and m(3) = 0 or (b) m(1) = m(2) = 0 and m(3) = 0. In both cases, we may introduce a particular perturbation which ensures the resultant neutrino mixing matrix to be the tri-bimaximal mixing pattern or its viable variations. We find that it is natural to incorporate this kind of neutrino mass matrix in the minimal Type-II seesaw model with only one heavy right-handed Majorana neutrino N. We show that it is possible to account for the cosmological baryon number asymmetry in the m(3) = 0 case via thermal leptogenesis, in which the CP-violating asymmetry of N decays is attributed to the electron flavor.