The article says muons decay in 2.2 microseconds, but muons traveling at > 0.99c live significantly longer due to relativity.

It's pretty surprising the article doesn't mention time dilation at all, seems like it would be a pretty important effect for anyone trying to design a muon accelerator.

Is there a way to create muons already traveling at relativistic velocity, or do you have to generate muons at rest and then accelerate them to >0.99c within a few microseconds?