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For All This Time, Protons Have Been Hiding Secret Mass. We Just Found It.
Story by Jackie Appel • Yesterday 5:25 PM
Usually, when we talk about mass, we’re talking about how much stuff is in an object. Everything from your body to a black hole is made up of matter, and adding all that matter together gives you the mass of an object.
But, just like everything else, mass can get a little screwy in the quantum world. Physicists have been puzzling over why protons are more massive than the matter that makes them up for a long time, and recently, they seem to have figured it out.
Protons are physically made up of three smaller pieces called valence quarks, the absolute fundamental constituents of matter. They're not made of anything else—a quark is as small and basic as you can go. But adding up the mass of the quarks alone doesn’t give you the mass of the proton.
More:
https://www.msn.com/en-us/news/technology/for-all-this-time-protons-have-been-hiding-secret-mass-we-just-found-it/ar-AA19jArq
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