论文标题
轻型无菌中微子和瘦植物发生
Light sterile neutrino and leptogenesis
论文作者
论文摘要
我们研究了瘦素发生的模型，其中涉及三个右手的主要中微子，并且最小扩展的Seesaw机制（包括额外的单线场）产生了四个光中微子。这项研究表明，可以通过将最简单的正交基质输入到Seesaw的CASAS-IBARRA（CI）表示中来确定质量排序和繁重的主要尺度的类型。从重中微子的衰变和稀释质量产生的CP不对称性是根据第四个中微子的质量和混合元素预测的。选择CI基质后，需要浅无菌中微子的存在来解释高能量的Lepton不对称性，鉴于现象学测量值。尽管有几个可归因于其他中微子的免费参数，但该模型可以部分受到低能实验的约束，例如无菌中微子搜索和中微子双β衰减，以及宇宙中观察到的巴里昂不对称。
We studied models of leptogenesis where three right-handed Majorana neutrinos are involved and the minimal-extended seesaw mechanism including an additional singlet field produces four light neutrinos. This study shows that the type of mass ordering and heavy Majorana scales can be determined by inputting the simplest orthogonal matrix into the Casas-Ibarra(CI) representation of seesaw. The CP asymmetry produced from the decays of heavy neutrinos and the dilution mass are predicted in terms of the mass and mixing elements of the fourth neutrino. Upon the choice of CI matrix, the existence of a light sterile neutrino is required to explain the high-energy lepton asymmetry in light of phenomenological measurements. Although there are several free parameters attributable to an additional neutrino, the model can be in part constrained by low-energy experiments such as sterile neutrino searches and neutrinoless double-beta decays, as well as the observed baryon asymmetry in the universe.
