6 citations · 9 across the 5 of their papers we have counts for
6 papers
21-cm Constraints on S-wave Dark Matter Annihilation with Subhalo-enhanced Effects
Zixuan Xu, Sibo Zheng
Observations of the 21-cm signal can probe energy injection into the intergalactic medium arising from dark matter annihilation during cosmic dawn and reionization. For s-wave anni…
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…
Lyman- limit on axion-like cold dark matter
Zixuan Xu, Sibo Zheng
Using low redshift data on astrophysical reionization, we report new Lyman- limit on axion-like particle (ALP) as cold dark matter in ALP mass range of eV. C…
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…
Gravitational freeze-in dark matter from Higgs Preheating
Ruopeng Zhang, Zixuan Xu, Sibo Zheng
Gravitational freeze-in is a mechanism to explain the observed dark matter relic density if dark matter neither couples to inflation nor to standard model sector. In this work, we…
Freeze-in Dark Matter via Lepton Portal: Hubble Tension and Stellar Cooling
Zixuan Xu, Shuai Xu, Ruopeng Zhang +1
We propose a new freeze-in dark matter candidate which feebly couples to the standard model charged leptons. The feeble interactions allow it (i) to freeze-in from the Standard Mod…