Below is the transcript of a section from Demystifying the Higgs Boson with Leonard Susskind. Around 1:02:23 Susskind says that
the heaviest of the fermions is called the top quark. Top quark is thousands of times heavier than the electron many many times heavier, and higgs preferentially will decay into top quarks. (higgs cannot decay to quarks because they are too heavy. so you take two quarks and align them to produce higgs! ... Go into the laboratory and take two top quarks, collide them together and make a higgs. The problem is that it is not so easy to find top quarks in nature... why not? they decay very rapidly to the other quarks. They are not sitting around. You cannot put them in the accelerator and accelerate them... they disappear in a tiny fraction of a second. There are no top quarks sitting around. Not even buried in protons and so forth. You have to make top quarks somehow in the collision...
My question is, are the particles that reveal themselves in a collider exist outside the collider, that is, outside the strong electric and magnetic fields that make them?
What I am trying to understand, if Higgs or quarks are "fundamental" and "elementary" particles, are there any experiments showing that they exist outside the magnetic and electric field that create them?