Is dark matter tachyons?

A new theory proposes that faster-than-light particles known as tachyons could answer a lot of questions about the universe, writes Robyn Arianrhod. read more

In fact, observations indicate that dark matter must, in the main, be cold, meaning very non-relativistic, I.e. moving at a small fraction (less than 1%) of the speed of light. read more

during the cosmic ‘dark age’ after photon decoupling and before star formation. If tachyons were to form a component of dark matter at the current epoch, it is clear that µ would have to be exceedingly small, say < 10-3 eV. read more