What is a bottom quark?
A quark is one of the fundamental constituents of matter that make up the universe according to the Standard Model of particle physics. The bottom quark is the fifth flavor of quark (in order of increasing mass), with electric charge of -1/3. Why do you want to study the bottom quark? The Standard Model has definite and sizable predictions that the decays of bottom quarks will violate CP symmetry, that is, the decays of bottom quarks will be different from the decays of bottom anti-quarks. We want to observe these CP violations and test as completely as possible the predictions of the Standard Model. What is so important about that? As of now, the Standard Model describes much of the phenomena that is seen. So far all predictions are consistent with experiment. However the CP violation associated with quarks in the Standard Model is not enough to explain why our universe is made up of more matter than anti-matter. This suggests that either the CP violation associated with quarks in the
