Also:
“Beauty quarks, sometimes called bottom quarks, are fundamental particles, which in turn make up bigger particles. There are six flavors of quarks that are dubbed up, down, strange, charm, beauty/bottom and truth/top. Up and down quarks, for example, make up the protons and neutrons in the atomic nucleus.
Beauty quarks are unstable, living on average just for about 1.5 trillionths of a second before decaying into other particles.”
If they decay into other particles, how can they be fundamental particles? The article seems to contradict itself.
I think this is just bad physics terminology like spin not really meaning spin. Any time a particle changes into other particles the physicists call it decay.