Complex sentence: Because it is so massive, the top quark also allows to predict the mass of the Higgs boson under certain extensions of the Standard Model (see Mass of the Higgs boson below) and is extensively studied as a means to disciminate between competing theories.
Split into simpler sentences: Because it is so massive, the top quark also allows to predict the mass of the Higgs boson under certain extensions of the Standard Model (see Mass of the Higgs boson below). As such, it is extensively studied as a means to disciminate between competing theories.