Possible evidences from H(z) parameter data for physics beyond Lambda CDM

Submit Time: 2023-05-24

Author: Yang, Rong-Jia 1,2,3,4 ;

Institute: 1.College of Physics Science and Technology, Hebei University, Baoding 071002, China; 2.Hebei Key Lab of Optic-Electronic Information and Materials, Hebei University, Baoding 071002, China; 3.National-Local Joint Engineering Laboratory of New Energy Photoelectric Devices, Hebei University, Baoding 071002, China; 4.Key Laboratory of High-pricision Computation and Application of Quantum Field Theory of Hebei Province, Hebei University, Baoding 071002, China;

Abstracts

[英文摘要]We analyse $H(z)$ parameter data with some conditions by using Lagrange mean value theorem in Calculus. We find that: (1) there exists at least one decelerated phase at 1 $ sigma$ confidence level in the redshift range $(0.38, 0.59)$; (2) the equation of motion of dark energy may be less than $-1$ at 1 $ sigma$ confidence level at some redshifts in the redshift range $(1.3, 1.53)$; (3) there exists at least one accelerated phase at 1 $ sigma$ confidence level in the redshift range $(1.037, 1.944)$. These results may provide possible evidences for physics beyond $ Lambda$CDM.

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From: 杨荣佳

Subject: Astronomy >> Galaxy and Cosmology

DOI：10.12074/202305.00221V1

Keywords: Habble parameters,; accelerated expansion, $Lambda$CDM;

Cite as: chinaXiv:202305.00221 (or this versionchinaXiv:202305.00221V1)

Recommended references： Yang, Rong-Jia.(2023).Possible evidences from H(z) parameter data for physics beyond Lambda CDM.doi:10.12074/202305.00221V1 (Click&Copy)

Version History
[V1]	2023-05-24 21:57:22	chinaXiv:202305.00221V1	Download

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