3 papers
astro-ph.CO2025
Little Red Dots from Small-Scale Primordial Black Hole Clustering
Borui Zhang, Wei-Xiang Feng, Haipeng An
The James Webb Space Telescope (JWST) observations have identified a class of compact galaxies at high redshifts (), dubbed "little red dots" (LRDs). The…
hep-ph2025
Topological defects as effective dynamical dark energy
Haipeng An, Chengcheng Han, Borui Zhang
In this work, we consider the possibility that the dynamical dark energy hinted at by recent DESI data may be mimicked by the effects of additional components in the universe, pote…
hep-ph2025
Primordial Stochastic Gravitational Waves from Massive Higher-Spin Bosons
Haipeng An, Zhehan Qin, Zhong-Zhi Xianyu +1
Can a stationary stone radiate gravitational waves (GWs)? While the answer is typically "no" in flat spacetime, we get a "yes" in inflationary spacetime. In this work, we study the…