The world’s top particle physics lab said Friday it had measured the decay time of a particle known as a Bs (B sub s) meson into two other fundamental particles called muons, which are much heavier than but similar to electrons.
Particles: all the elementary particles in the standard model of particle physics (and many non-elementary particles too) (free .pdf)--print your own for free or order posters, with lots of related charts!
Standard Model of Elementary Particles - Subatomic particle - Wikipedia, the free encyclopedia
The Top Quark, also known as the t quark (symbol: t) or truth quark, is an elementary particle and a fundamental constituent of matter. Like all quarks, the top quark is an elementary fermion with spin-1⁄2, and experiences all four fundamental interactions: gravitation, electromagnetism, weak interactions, and strong interactions. It has an electric charge of +2⁄3 e, and is the most massive of all observed elementary particles.