New parametrization of the seesaw mechanism and applications in supersymmetric models
New parametrization of the seesaw mechanism and applications in supersymmetric models
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DOI：
10.1103/physrevd.66.115013
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发表时间：
2002-06
影响因子：
5
通讯作者：
J. Ellis;J. Hisano;M. Raidal;Y. Shimizu
中科院分区：
文献类型：
--
作者：
J. Ellis;J. Hisano;M. Raidal;Y. Shimizu
我们提出了最小跷跷板模型的一种新的参数化方法，用有效的轻中微子观测值和辅助的厄米矩阵h来表示重单重态中微子狄拉克- Yukawa耦合（Y n） ij和马约拉纳质量MNi。在最小超对称跷跷板模型中，后者可以直接与其他低能观测值相关，包括违反带电轻子味和CP的过程。这种参数化使人们在通过扫描模型允许的参数空间来研究其他观测值的可能范围时，能够尊重对介子数违和的严格约束。相反，如果观察到任何轻子风味破坏过程，则可以直接使用该测量来约束（Y n） ij和MN i。作为应用，我们在最小超对称跷跷板模型中研究了违反风味的t衰变和轻子的电偶极矩。
We present a new parametrization of the minimal seesaw model, expressing the heavy-singlet neutrino Dirac Yukawa couplings (Y n) ij and Majorana masses MNi in terms of effective light-neutrino observables and an auxiliary Hermitian matrix H. In the minimal supersymmetric version of the seesaw model, the latter can be related directly to other low-energy observables, including processes that violate charged lepton flavor and CP . This parametrization enables one to respect the stringent constraints on muon-number violation while studying the possible ranges for other observables by scanning over the allowed parameter space of the model. Conversely, if any of the lepton-flavor-violating process is observed, this measurement can be used directly to constrain ( Y n) ij and MN i . As applications, we study flavor-violating t decays and the electric dipole moments of leptons in the minimal supersymmetric seesaw model.