[Liberty Tree Surgeon]

According to the theory, every known particle in the universe from the electron to the neutrino has a counterpart that has eluded detection.

Yet another fact-checking gaff from the NYT, I think. Anyone can correct me if I'm wrong, but the counterparts of many particles have been detected, such as the electron/positron, right?

LTS

[68skylark]

I think you're right -- good catch.

[Tac12]

Anyone can correct me if I'm wrong, but the counterparts of many particles have been detected, such as the electron/positron, right?
I think the article refers to so called super partners of standard particles. They have names like
super partner of electron = selectron
super partner of quark = squark
super partner of photon = photino
super partner of neutrino = neutralino
Just to repeat, these super partners have never been detected.