activity
19982008
most citedReply to the Comment on "Spin and orbital angular momentum in gauge theories: Nucleon spin structure and multipole radiation revisited" [PRL 100:232002 (2008)]

198 citations · 397 across the 6 of their papers we have counts for

collaborators
Showing astro-phShow all

2 papers · 1 filter

astro-ph2005

Can dark matter be mostly massless particles?

Xiang-Song Chen

We discuss an overlooked factor in dark matter studies. Namely, if massless particles are captured into a local structure and stop free streaming in the universe, they no longer lo…

astro-ph2005★ 1 cited

Co-existence of Gravity and Antigravity: The Unification of Dark Matter and Dark Energy

Xiang-Song Chen

Massive gravity with second and fourth derivatives is shown to give both attractive and repulsive gravities. In contrast to the attractive gravity correlated with the energy-moment…