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arXiv 2004.05634hep-ph
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极小左右对称模型中中微子质量矩阵织构零点的唯象研究

Phenomenological study of texture zeros of neutrino mass matrix in minimal left-right symmetric model

Happy Borgohain, Mrinal Kumar Das, Debasish Borah

摘要:

研究了最小左右对称模型(LRSM)中微子质量矩阵中织构零点的唯象意义。由于最大零的可能性减少了模型的自由参数的最大数量,使其更具预测性,我们只考虑了轻中微子质量矩阵$M_ν$,狄拉克中微子质量矩阵$M_D$和重右手(RH)中微子质量矩阵$M_{RR}$中最大可能的纹理零的情况。然后计算了不同轻中微子参数之间的相关性,以及不同织构零情况下的新物理对无中微子双β衰变(NDBD)的贡献。我们发现,RH中微子质量超过1 GeV,新的物理贡献NDBD可以饱和相应的实验约束。

英文摘要:

We studied the phenomenological implications of texture zeros in the neutrino mass matrix of the minimal left-right symmetric model (LRSM). Since the possibility of maximum zeros reduces the maximum number of free parameters of the model making it more predictive, we considered only those cases with maximum possible texture zeros in light neutrino mass matrix $M_ν$, Dirac neutrino mass matrix $M_D$ and heavy right-handed (RH) neutrino mass matrix $M_{RR}$. We then computed the correlations among the different light neutrino parameters and then the new physics contributions to neutrinoless double beta decay (NDBD) for the different texture zero cases. We find that for RH neutrino masses above 1 GeV, the new physics contributions to NDBD can saturate the corresponding experimental bound.

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