A carrier particle of the weak interactions. It is involved in all electric-charge-changing weak processes.

The interaction responsible for all processes in which flavor changes, hence for the instability of heavy quarks and leptons, and particles that contain them. Weak interactions that do not change flav [..]

A particle that exists only for an extremely brief instant as an intermediary in a process. The intermediate or virtual particle stages of a process cannot be directly observed. If they were observed, [..]

The least massive flavor of quark, with electric charge 2/3.

A detector placed very close to the collision point in a colliding beam experiment so that tracks coming from the decay of a short-lived particle produced in the collision can be accurately reconstruc [..]

The record of the path of a particle traversing a detector.

The reconstruction of a ``track'' left in a detector by the passage of a particle through the detector.

The quantum principle, first formulated by Heisenberg, that states that it is not possible to know exactly both the position x and the momentum p of an object at the same time.  x  p . It can be writt [..]

The sixth flavor of quark (in order of increasing mass), with electric charge 2/3. Its mass is much greater than any other quark or lepton.

A type of circular accelerator in which the particles travel in synchronized bunches at fixed radius.