January 7, 2021 feature The first evidence of top quark production in nucleus-nucleus collisions . by Ingrid Fadelli , Phys.org Top quarks almost always decay into a b quark and W boson; the latter further decays into leptons or quarks that can be detected and form the so-called “final state”. The sketch illustrates the process of the top quark decaying to other particles, and the average decay times of each particle are indicated on the x-axis. The quark-gluon plasma d...