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arXiv 2005.12041astro-ph.COgr-qchep-ph
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普朗克2018年后真空能与冷暗物质相互作用对中微子质量的约束

Constraints on neutrino mass in the scenario of vacuum energy interacting with cold dark matter after Planck 2018

Hai-Li Li, Jing-Fei Zhang, Xin Zhang

摘要:

本文利用最新的宇宙学观测资料,研究了真空能量与冷暗物质(简称I $Λ$ CDM)相互作用对中微子总质量的限制.我们考虑了四种典型的交互形式,即,在I $Λ$ CDM场景中,$Q=βH ρ_{\rm de}$、$Q=βH ρ_{\rm c}$、$Q=βH_{0} ρ_{\rm de}$和$Q=βH_{0} ρ_{\rm c}$。为了避免相互作用暗能量模型中的大尺度不稳定性问题,我们采用扩展的相互作用暗能量参数化后Friedmann方法计算了这些模型中暗能量的微扰演化.这项工作中使用的观测数据包括普朗克2018年数据发布的宇宙微波背景(CMB)测量,重子声振荡(BAO)数据,Ia型超新星(SN)观测(Pantheon汇编),以及哈勃太空望远镜2019年哈勃常数$H_{0}$的本地距离阶梯测量。我们发现,与$Λ$ CDM+ $\sum m_ν$模型相比,四个I $Λ$ CDM+ $\sum m_ν$模型中对$\sum m_ν$的约束更宽松.当考虑中微子的三个质量等级时,对$\sum m_ν$的约束在简并等级情况下是最紧的,而在反等级情况下是宽松的。此外,在4个I $Λ$ CDM+ $\sum m_ν$模型中,CMB+BAO+SN+ $H_{0}$数据组合的耦合参数$β$值大于CMB+BAO+SN数据组合的耦合参数$β$值,且在1个以上的$σ$水平上,CMB+BAO+SN+ $H_{0}$数据组合的耦合参数$β>0$更受青睐。本文还讨论了$H_{0}$张力问题。我们发现,与$Λ$ CDM+ $\sum m_ν$模型相比,I $Λ$ CDM+ $\sum m_ν$模型中的$H_{0}$张力在一定程度上得到了缓解.

英文摘要:

In this work, we investigate the constraints on the total neutrino mass in the scenario of vacuum energy interacting with cold dark matter (abbreviated as I$Λ$CDM) by using the latest cosmological observations. We consider four typical interaction forms, i.e., $Q=βH ρ_{\rm de}$, $Q=βH ρ_{\rm c}$, $Q=βH_{0} ρ_{\rm de}$, and $Q=βH_{0} ρ_{\rm c}$, in the I$Λ$CDM scenario. To avoid the large-scale instability problem in interacting dark energy models, we employ the extended parameterized post-Friedmann method for interacting dark energy to calculate the perturbation evolution of dark energy in these models. The observational data used in this work include the cosmic microwave background (CMB) measurements from the Planck 2018 data release, the baryon acoustic oscillation (BAO) data, the type Ia supernovae (SN) observation (Pantheon compilation), and the 2019 local distance ladder measurement of the Hubble constant $H_{0}$ from the Hubble Space Telescope. We find that, compared with those in the $Λ$CDM+$\sum m_ν$ model, the constrains on $\sum m_ν$ are looser in the four I$Λ$CDM+$\sum m_ν$ models. When considering the three mass hierarchies of neutrinos, the constraints on $\sum m_ν$ are tightest in the degenerate hierarchy case and loosest in the inverted hierarchy case. In addition, in the four I$Λ$CDM+$\sum m_ν$ models, the values of coupling parameter $β$ are larger using the CMB+BAO+SN+$H_{0}$ data combination than that using the CMB+BAO+SN data combination, and $β>0$ is favored at more than 1$σ$ level when using CMB+BAO+SN+$H_{0}$ data combination. The issue of the $H_{0}$ tension is also discussed in this paper. We find that, compared with the $Λ$CDM+$\sum m_ν$ model, the $H_{0}$ tension can be alleviated in the I$Λ$CDM+$\sum m_ν$ model to some extent.

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