首页 | 本学科首页   官方微博 | 高级检索  
     


Exploring neutrino mass and mass hierarchy in interacting dark energy models
Authors:Lu Feng  Hai-Li Li  Jing-Fei Zhang  Xin Zhang
Affiliation:College of Physical Science and Technology;Department of Physics;Ministry of Education Key Laboratory of Data Analytics and Optimization for Smart Industry;Center for High Energy Physics;Center for Gravitation and Cosmology
Abstract:We investigate how the dark energy properties impact the constraints on the total neutrino mass in interacting dark energy(IDE)models. In this study, we focus on two typical interacting dynamical dark energy models, i.e., the interacting w cold dark matter(IwCDM) model and the interacting holographic dark energy(IHDE) model. To avoid the large-scale instability problem in IDE models, we apply the parameterized post-Friedmann approach to calculate the perturbation of dark energy. We employ the Planck 2015 cosmic microwave background temperature and polarization data, combined with low-redshift measurements on baryon acoustic oscillation distance scales, type Ia supernovae, and the Hubble constant, to constrain the cosmological parameters. We find that the dark energy properties could influence the constraint limits on the total neutrino mass. Once dynamical dark energy is considered in the IDE models, the upper bounds of ∑mν will be changed. By considering the values of χmin2 , we find that in these IDE models the normal hierarchy case is slightly preferred over the inverted hierarchy case; for example, ?χ2= 2.720 is given in the IHDE+∑mν model. In addition, we also find that in the Iw CDM+∑mν model β = 0 is consistent with current observational data inside the 1σ range, and in the IHDE+∑mν model β > 0 is favored at more than 2σ level.
Keywords:neutrino mass  mass hierarchies of neutrinos  interacting dark energy  cosmological observations  cosmological constraints
本文献已被 CNKI 维普 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号