4 papers
Revisiting the Hubble tension with an inverse power-law early dark energy
Quan Zhou, Sibo Zheng
We propose a new early dark energy with a potential that has an inverse power-law asymptotic tail to alleviate the Hubble tension. Fitting this model to the datasets of CMB+BAO+SN+…
Dynamical Dark Energy in light of DESI BAO and Full-Shape Data
Quan Zhou, Sibo Zheng
Recently, the DESI BAO data has reported a preference of dynamical dark energy (DDE) over the \LambdaCDM cosmology. Apart from the BAO data, the DDE model should be also sensitive…
Interpreting the Hubble tension with a cascade decaying dark matter sector
Quan Zhou, Zixuan Xu, Sibo Zheng
Hubble tension can be alleviated by altering either early- or late-time CDM. With only one of these effects introduced, early dark energy remains the only solution capable of re…
Constraints on freeze-in dark matter from Lyman- forest and 21-cm signal : single-field models
Zixuan Xu, Quan Zhou, Sibo Zheng
We report new Lyman- and 21-cm constraints on freeze-in dark matter (FIDM) which injects energy into the intergalactic medium either through annihilation or decay to photon(s) o…