Constraining Neutrino Mass in Dynamical Dark Energy Cosmologies with the Logarithm Parametrization and the Oscillating Parametrization  

作　　者：Tian-Ying Yao Rui-Yun Guo Xin-Yue Zhao Tian-Ying Yao;Rui-Yun Guo;Xin-Yue Zhao(School of Sciences, Xi’an Technological University, Xi’an, China)

机构地区：[1]School of Sciences, Xi’an Technological University, Xi’an, China

出　　处：《Journal of High Energy Physics, Gravitation and Cosmology》2023年第4期1044-1061,共18页高能物理（英文）

摘　　要：We constrain two dynamical dark energy models that are parametrized by the logarithm form of and the oscillating form of . Comparing with the Chevallier-Polarski-Linder (CPL) model, the two parametrizations for dark energy can explore the whole evolution history of the universe properly. Using the current mainstream observational data including the cosmic microwave background data and the baryon acoustic oscillation data as well as the type Ia supernovae data, we perform the X² statistic analysis to global fit these models, finding that the logarithm parametrization and the oscillating parameterization are almost as well as the CPL scenario in fitting these data. We make a comparison for the impacts of the dynamical dark energy on the cosmological constraints on the total mass of active neutrinos. We find that the logarithm parametrization and the oscillating parameterization can increase the fitting values of Σm_v. Looser constraints on Σm_v are obtained in the logarithm and oscillating models than those derived in the CPL model. Consideration of the possible mass ordering of neutrinos reveals that the most stringent constraint on Σm_v appears in the degenerate hierarchy case.We constrain two dynamical dark energy models that are parametrized by the logarithm form of and the oscillating form of . Comparing with the Chevallier-Polarski-Linder (CPL) model, the two parametrizations for dark energy can explore the whole evolution history of the universe properly. Using the current mainstream observational data including the cosmic microwave background data and the baryon acoustic oscillation data as well as the type Ia supernovae data, we perform the X² statistic analysis to global fit these models, finding that the logarithm parametrization and the oscillating parameterization are almost as well as the CPL scenario in fitting these data. We make a comparison for the impacts of the dynamical dark energy on the cosmological constraints on the total mass of active neutrinos. We find that the logarithm parametrization and the oscillating parameterization can increase the fitting values of Σm_v. Looser constraints on Σm_v are obtained in the logarithm and oscillating models than those derived in the CPL model. Consideration of the possible mass ordering of neutrinos reveals that the most stringent constraint on Σm_v appears in the degenerate hierarchy case.

关 键 词：Dynamical Dark Energy Neutrino Mass Observational Constraints 

分 类 号：O57[理学—粒子物理与原子核物理]