Protons can contain a smaller particle that is heavier than the proton itself

Protons can contain a smaller particle that is heavier than the proton itself

Protons may have more “charm” than we thought, new research suggests.

A proton is one of the subatomic particles that make up the nucleus of an atom. As small as protons are, they are composed of even smaller elementary particles known as quarks, which come in several “flavors” or types: up, down, strange, charm, bottom, and top.

Typically, a proton is thought to be made up of two up quarks and one down quark. But a new study finds it’s more complicated than that.

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