Cosmic constraint on massive neutrinos in viable f(R) gravity with producing Lambda CDM background expansion
Cosmic constraint on massive neutrinos in viable f(R) gravity with producing Lambda CDM background expansion
复制标题
可行的 f(R) 引力中大质量中微子的宇宙约束并产生 Lambda CDM 背景膨胀
DOI：
10.1140/epjc/s10052-016-4525-7
复制
发表时间：
2016
影响因子：
4.4
通讯作者：
Yang Weiqiang
中科院分区：
文献类型：
--
作者：
Lu Jianbo;Liu Molin;Wu Yabo;Wang Yan;Yang Weiqiang
Tensions between several cosmic observations were found recently, such as the inconsistent values of(or) were indicated by the different cosmic observations. Introducing the massive neutrinos inCDM could potentially solve the tensions. Viablef(R) gravity producingCDM background expansion with massive neutrinos is investigated in this paper. We fit the current observational data: Planck-2015 CMB, RSD, BAO, and SNIa to constrain the mass of neutrinos in viablef(R) theory. The constraint results at 95% confidence level are:eV for the active-neutrino case,eV withfor the sterile neutrino case. For the effects due to the mass of the neutrinos, the constraint results on model parameter at 95% confidence level becomeandfor two cases, respectively. It is also shown that the fitting values of several parameters much depend on the neutrino properties, such as the cold dark matter density, the cosmological quantities at matter–radiation equality, the neutrino density and the fraction of baryonic mass in helium. Finally, the constraint result shows that the tension between direct and CMB measurements ofgets slightly weaker in the viablef(R) model than that in the baseCDM model.
