In string theory, each type of elementary matter particle—and each type of fundamental force carrier particle that mediates interactions between matter particles—corresponds to a unique string ...
Bosons are also known as force carriers because they mediate the interaction of these fundamental particles via one of the three forces: electromagnetic, nuclear strong, and weak forces.
The basic idea is this: in addition to the dark-matter particles themselves, a new GeV-scale force-carrier is postulated (and denoted Ï•) that both mediates the process of dark-matter annihilation ...
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