SCIENCE: Hunting the “Dark Photon”
Almost everything is missing. And a team of physicists is trying to find all of it. The universe as we know it includes about a tenth of the total stuff that’s out there. The rest? Missing. Invisible. Undetectable, except through the effects of its gravity on the fraction of stuff that we can see. Researchers call that missing stuff the dark sector — the class of energetic and massive particles that seemingly must exist out there somewhere but that don’t interact with luminous matter (the stuff we’re made of, along with everything we can see) in any way we can … Read more