18 citations · 36 across the 12 of their papers we have counts for
13 papers
Dark Photons from Red Dwarfs
Stefan Vogl, Xun-Jie Xu
Light dark photons can be produced in stellar systems and thus contribute to the stellar cooling rate. The additional cooling changes the evolution of the star and has an impact on…
A Unified Bogoliubov Approach to Primordial Gravitational Waves: From Inflation to Reheating
Yubing Wang, Quan-feng Wu, Xun-Jie Xu
We present an effective numerical method that can be used to straightforwardly calculate the full spectrum of primordial gravitational waves produced during inflation and reheating…
Dark Photons in the Early Universe: From Thermal Production to Cosmological Constraints
Xun-Jie Xu, Boting Zhou
Dark photons, a generic class of light gauge bosons that interact with the Standard Model (SM) exclusively through kinetic mixing, arise naturally in many gauge extensions of the S…
Widen the Resonance at Ultra-High Energies: Novel Probes of Neutrino Self-interactions in the High-Mass Regime
Pedro A. N. Machado, Isaac R. Wang, Xun-Jie Xu +1
Neutrino self-interaction beyond the Standard Model is well motivated by the nonzero masses of neutrinos, which are the only known particles guaranteed to have new physics. Cosmic…
Primordial Black Holes Evaporating before Big Bang Nucleosynthesis
Quan-feng Wu, Xun-Jie Xu
Primordial black holes (PBHs) formed from the collapse of density fluctuations provide a unique window into the physics of the early Universe. Their evaporation through Hawking rad…
No Hiding in the Dark: Cosmological Bounds on Heavy Neutral Leptons with Dark Decay Channels
P. S. Bhupal Dev, Quan-feng Wu, Xun-Jie Xu
Heavy neutral leptons (HNLs) are well-motivated new physics candidates. The mixing of sub-GeV HNLs with active neutrinos is severely constrained by cosmology. In particular, the su…
Widen the Resonance: Probing a New Regime of Neutrino Self-Interactions with Astrophysical Neutrinos
Isaac R. Wang, Xun-Jie Xu, Bei Zhou
Neutrino self-interactions beyond the standard model have profound implications in astrophysics and cosmology. In this Letter, we study an uncharted scenario in which one of the th…
Heating the dark matter halo with dark radiation from supernovae
Stefan Vogl, Xun-Jie Xu
Supernova explosions are among the most extreme events in the Universe, making them a promising environment in which to search for the effects of light, weakly coupled new particle…
Gravitational charge production
Martin A. Mojahed, Kai Schmitz, Xun-Jie Xu
Wash-in leptogenesis is an attractive mechanism to produce the baryon asymmetry of the Universe. It treats right-handed-neutrino interactions as spectator processes, on the same fo…
High-Energy and Ultra-High-Energy Neutrinos from Primordial Black Holes
Quan-feng Wu, Xun-Jie Xu
Primordial Black Holes (PBHs) are capable of emitting extremely energetic particles independent of their interactions with the Standard Model. In this work, we investigate whether…
Impact of the cosmic neutrino background on long-range force searches
Garv Chauhan, Xun-Jie Xu
Light bosons can mediate long-range forces. We show that light bosonic mediators interacting with a background medium, in particular, with the cosmic neutrino background (CB), m…
Imprints of light dark matter on the evolution of cosmic neutrinos
Isaac R. Wang, Xun-Jie Xu
Neutrinos are often considered as a portal to new physics beyond the Standard Model (SM) and might possess phenomenologically interesting interactions with dark matter (DM). This p…
Wash-in leptogenesis after the evaporation of primordial black holes
Kai Schmitz, Xun-Jie Xu
Wash-in leptogenesis is a powerful mechanism to generate the baryon asymmetry of the Universe that treats right-handed-neutrino interactions on the same footing as electroweak spha…