2018/01/02 by Yang-Jie Yan, Yan, Yang-Jie, Wang, Deng +2
Earth and Planetary Sciences · Physics and Astronomy · #Cosmology and Gravitation Theories #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #Earth Systems and Cosmic Evolution #FOS: Physical sciences #Relativity and Gravitational Theory
paper · pdf · doi:10.48550/arxiv.1801.00689
openalex publication_date 2018/01/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We examine the decay vacuum model with a parameter ε that indicates the vacuum energy decay rate. By constraining this model with cosmic microwave background radiation, baryon acoustic oscillation, type Ia supernovae and 30 H(z) cosmic chronometer data points, we find that ε=-0.0003±0.00024 with the best fitted χ2 value slightly smaller than that in the ΛCDM model. A negative value of ε suggesting dark matter energy decay into vacuum energy. We also obtain the Hubble constant H0=68.05±0.56 that can alleviate the current H0 tension between the local observation by the Hubble Space Telescope and the global measurement by the Planck Satellite. Using the effective equation of state formalism, we find this model is quintessence-like.