期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 2, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP02(2017)017
关键词
Beyond Standard Model; Cosmology of Theories beyond the SM; Supersymmetric Standard Model
资金
- IBS [IBS-R018-D1]
- World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan
- US Department of Energy, Office of High Energy Physics
- [26247038]
- [26247042]
- [16H02189]
- [26800121]
- [26800123]
- [26104001]
- [26104009]
- [15H05888]
- Grants-in-Aid for Scientific Research [26104009, 26247042, 26800121, 26800123] Funding Source: KAKEN
- Ministry of Science & ICT (MSIT), Republic of Korea [IBS-R018-D1-2017-A00] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The Affleck-Dine leptogenesis scenario along the LH (u) flat direction is reconsidered. It is known that successful Affleck-Dine leptogenesis requires that the lightest neutrino mass is extremely small. This situation can be significantly relaxed if the neutrino mass in the early universe is different from the present one. We consider a supersymmetric Dine-Fischler-Srednicki-Zhitnitsky (DFSZ) type model, which provides a solution to the strong CP problem and generates a SUSY mu-term and right-handed neutrino masses. If the PQ scale during lepton number generation is much larger than the present value, leptogenesis is very efficient so that enough baryon number can be generated without introducing a hierarchically small neutrino mass. The final baryon asymmetry is related to the mu-term, and hence linked to the level of electroweak fine-tuning. We also show the PQ breaking scalar dynamics that keeps a large PQ breaking scale during inflation and lepton number generation. The mu-term generating superpotential plays an important role for preserving the lepton asymmetry during saxion oscillation. In this scenario, the axion isocurvature perturbation is naturally suppressed.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据