discovery of the top quark , if confirmed , establishes one sequence of subatomic building block whose existence is determined by the prevailing theory , calling the standard model , of the elements and forces that determine the fundamental nature of energy and space . in the whimsical lexicon of modern physics , the elementary particles are termed protons , leptons and bosons .
Quarks, leptons, and bosons are the three elementary particles of physics according to the Standard Model.