Emergent Unparticles Dark Energy can restore cosmological concordance

被引：6

作者：

Ben-Dayan, Ido ^{[1
]}

Kumar, Utkarsh ^{[1
]}

机构：

[1] Ariel Univ, Phys Dept, Ramat HaGolan, Israel

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2023年 / 12期

关键词：

cosmological parameters from CMBR; cosmological parameters from LSS; cosmology of theories beyond the SM; baryon acoustic oscillations; SPECTROSCOPIC SURVEY MEASUREMENT; ANISOTROPIC POWER SPECTRUM; RED GALAXY SAMPLE; GROWTH-RATE; REDSHIFTS; 0.6; BAO;

D O I：

10.1088/1475-7516/2023/12/047

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Addressing the discrepancy between the late and early time measurements of the Hubble parameter, H0, and the so-called S8 parameter has been a challenge in precision cosmology. Several models are present to address these tensions, but very few of them can so simultaneously. In the past, we have suggested Banks-Zaks/Unparticles as an emergent Dark Energy model, and claimed that it can ameliorate the Hubble tension. In this work, test this claim, and perform a likelihood analysis of the model and its parameters given current data, and compare it to ACDM. The model offers a possible resolution of Hubble tension and softens the Large Scale Structure (LSS) tension without employing a scalar field or modifying the gravitational sector. Our analysis shows a higher value of H0 similar to 70-73 km/sec/Mpc and slightly lower value of S8 for certain combinations of data sets. Consideration of Planck CMB data combined with the Pantheon sample and SH0ES priors lowers the H0 and S8 tension 0.96o-and 0.94o-respectively with best-fit Ax2 approximate to -11 restoring cosmological concordance. Significant improvement in the likelihood persists for other combinations of data sets as well. Evidence for the model is given by inferring one of its parameters to be x0 <^> -4.46. The improvement in the fit is driven by the inclusion of the SH0ES prior. In its absence most the improvement is due to larger error bars in the Emergent Unparticles Dark Energy model.

引用

页数：28

共 73 条

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