“A kilogram of matter-antimatter annihilation releases a whopping ... researchers must suspend the antimatter particle so it doesn’t recombine with the regular particle. Typically, this ...

To accommodate the very high annihilation rate required to produce ... of the excited state can yield the original dark-matter particle, along with an electron–positron pair.

Since the annihilation rate depends on density squared ... Balaji told IFLScience that even without finding such a particle ...