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A dark energy model from generalized Proca theory
Physics of the Dark Universe ( IF 5.0 ) Pub Date : 2021-04-17 , DOI: 10.1016/j.dark.2021.100819
Chao-Qiang Geng , Yan-Ting Hsu , Jhih-Rong Lu , Lu Yin

We consider a specific dark energy model, which only includes the Lagrangian up to the cubic order in terms of the vector field self-interactions in the generalized Proca theory. We examine the cosmological parameters in the model by using the data sets of CMB and CMB+HST, respectively. In particular, the Hubble constant is found to be H0=71.800.72+1.07 (72.480.60+0.72) kms1Mpc1 at 68% C.L. with CMB (CMB+HST), which would alleviate the Hubble constant tension. We also obtain that the reduced χ2 values in our model are close to unity when fitting with CMB and CMB+HST, illustrating that our model is a good candidate to describe the cosmological evolutions of the universe.



中文翻译:

基于广义Proca理论的暗能量模型

我们考虑一个特定的暗能量模型,该模型仅在广义Proca理论中就矢量场自相互作用而言仅包括拉格朗日直至三次阶。我们分别使用CMB和CMB + HST的数据集检查模型中的宇宙学参数。特别地,发现哈勃常数为H0=7180-072+1个077248-060+072公里-1个Mpc-1个CMB(CMB + HST)时CL值为68%,这将减轻哈勃恒张力。我们还获得了减少χ2个 当与CMB和CMB + HST拟合时,我们的模型中的值接近于统一,这说明我们的模型是描述宇宙的宇宙演化的一个很好的候选者。

更新日期:2021-04-21
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