But it's beginning to seem that the zoo of new particles that the theory predicts — the heavier cousins of known particles — may live only in physicists» imaginations. (sciencenews.org)
It describes all known particles, as well as three of the four forces that act on them: electromagnetism and the weak and strong nuclear forces. (newscientist.com)
Yet the tenets of quantum mechanics suggest the Higgs mass should be unstable, interacting with known particles to grow trillions of times higher. (scientificamerican.com)