We explore the possibility of a single generation of keV scale sterile neutrino [Formula: see text] as a dark matter candidate within the minimal extended seesaw (MES) framework and its influence in neutrinoless double beta decay [Formula: see text] study. Three hierarchical right-handed neutrinos were considered to explain neutrino mass. We also address baryogenesis via the mechanism of thermal leptogenesis considering the decay of the lightest RH neutrino to a lepton and Higgs doublet. A generic model based on [Formula: see text] flavor symmetry is constructed to explain both normal and inverted hierarchy mass pattern of neutrinos. Significant results on effective neutrino masses are observed in presence of sterile mass [Formula: see text] and active-sterile mixing [Formula: see text] in [Formula: see text]. Results from [Formula: see text] give stringent upper bounds on the active-sterile mixing matrix element. To establish sterile neutrino as dark matter within this model, we checked decay width and relic abundance of the sterile neutrino, which restricted sterile mass [Formula: see text] within some definite bounds. Constrained regions on the CP phases and Yukawa couplings are obtained from [Formula: see text] and baryogenesis results. Co-relations among these observable are also established and discussed within this framework.

中文翻译：

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最小扩展跷跷板中keV不育中微子的现象学

我们探索了在最小扩展跷跷板 (MES) 框架内将单代 keV 规模的无菌中微子 [公式：见文本] 作为暗物质候选者的可能性，及其对无中微子双 beta 衰变 [公式：见文本] 研究的影响。三个等级的右手中微子被认为可以解释中微子的质量。考虑到最轻的 RH 中微子衰变为轻子和希格斯双峰，我们还通过热轻子发生机制解决重子发生问题。构建了一个基于[公式：见正文]风味对称性的通用模型来解释中微子的正常和倒置层次质量模式。在[公式：见文本]中存在无菌质量[公式：见文本]和活性-无菌混合[公式：见文本]的情况下，观察到有效中微子质量的显着结果。[公式的结果：见正文] 对活性-无菌混合矩阵元素给出严格的上限。为了在该模型中将不育中微子确定为暗物质，我们检查了不育中微子的衰变宽度和残留丰度，这将不育质量 [公式：见文本] 限制在一定范围内。CP 相和 Yukawa 耦合的约束区域由 [公式：见正文] 和重子生成结果获得。这些可观察物之间的相互关系也在这个框架内建立和讨论。CP 相和 Yukawa 耦合的约束区域是从 [公式：见文本] 和重子生成结果中获得的。这些可观察物之间的相互关系也在这个框架内建立和讨论。CP 相和 Yukawa 耦合的约束区域是从 [公式：见文本] 和重子生成结果中获得的。这些可观察物之间的相互关系也在这个框架内建立和讨论。