Squeezing out predictions with leptogenesis from SO(10)
Squeezing out predictions with leptogenesis from SO(10)
复制标题
从 SO(10) 中挤出轻子发生的预测
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
G. Ricciardi
中科院分区：
文献类型：
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作者：
F. Buccella;D. Falcone;C. S. Fong;E. Nardi;G. Ricciardi
我们考虑了非超对称SO（10）模型中的跷跷板机制。通过假设SO（10）夸克-轻子对称性，并在施加适当的条件，确保右手（RH）中微子质量最多是温和的层次（紧凑的RH谱）后，我们得到了一个令人惊讶的预测方案。绝对中微子质量尺度，狄拉克和两个马约拉纳阶段的中微子混合矩阵仍然确定的一组已经测量的低能量观测值，模离散的模糊性的两个中微子混合角和狄拉克阶段的迹象。还预测了RH中微子的质谱，以及leptogenesis CP不对称的大小和符号。我们计算了通过轻子生成产生的宇宙学重子不对称性，得到了正确的符号和与观测相符的大小。
We consider the see-saw mechanism within a non-supersymmetric SO(10) model. By assuming the SO(10) quark-lepton symmetry, and after imposing suitable conditions that ensure that the right-handed (RH) neutrino masses are at most mildly hierarchical (compact RH spectrum) we obtain a surprisingly predictive scenario. The absolute neutrino mass scale, the Dirac and the two Majorana phases of the neutrino mixing matrix remain determined in terms of the set of already measured low energy observables, modulo a discrete ambiguity in the signs of two neutrino mixing angles and of the Dirac phase. The RH neutrinos mass spectrum is also predicted, as well as the size and sign of the leptogenesis CP asymmetries. We compute the cosmological baryon asymmetry generated through leptogenesis and obtain the correct sign, and a size compatible with observations.