I know this sounds stupid. Especially to those of you who are actual physicists. I am a 7th grade above-level student who knows a little bit more that the basics of physics. I have recently discovered quarks in searching about atoms and the makeup of Nitrogen-14. I know that we have known about quarks for a while now, but exactly HOW long have we known about them? Who discovered them, and when?
who discovered [quarks]
According to Wikipedia:
The quark model was independently proposed by physicists Murray Gell-Mann and George Zweig ...
The Wikipedia article continues:
... in 1964.
The proposal came shortly after Gell-Mann's 1961 formulation of a particle classification system known as the Eightfold Way—or, in more technical terms, SU(3) flavor symmetry. Physicist Yuval Ne'eman had independently developed a scheme similar to the Eightfold Way in the same year.