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Researchers at Fermilab in Illinois announced the discovery of the top quark, the most massive of all observed elementary particles.
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Fermilab
High-energy particle physics laboratory in Illinois, US
Fermi National Accelerator Laboratory, located in Batavia, Illinois, near Chicago, is a United States Department of Energy national laboratory specializing in high-energy particle physics.Source: Wikipedia (CC BY-SA)
Top quark
Type of quark
The top quark, sometimes also referred to as the truth quark, is the most massive of all observed elementary particles. It derives its mass from its coupling to the Higgs field. This coupling yt is very close to unity; in the Standard Model of particle physics, it is the largest…Source: Wikipedia (CC BY-SA)
Elementary particle
Subatomic particle having no substructure
In particle physics, an elementary particle or fundamental particle is a subatomic particle that is not composed of other particles. The Standard Model presently recognizes seventeen distinct particles—twelve fermions and five bosons. As a consequence of flavor and color…Source: Wikipedia (CC BY-SA)