Dark Matter/anti-particle theory

[Eastoff]

http://www.wired.com/wiredscience/2010/12/x-particle/

The new theoretical particle “is completely different from the WIMP idea,” Tulin said. The proposed particle, named simply “X,” has a separate antiparticle called “anti-X.” Equal amounts of X and anti-X were created in the Big Bang, and then decayed to lighter particles. Each X decayed into either a neutron or two dark-matter particles, called Y and Φ. Every anti-X converted to an anti-neutron or some anti-dark matter.

 

[jlprk]

You didn't argue for a side. Are you X, anti-X, or WIMP?