Once produced, the neutral Xi-sub-b (Symbol for Xi-sub-b) particle travels about a millimeter before it disintegrates into two particles: the short-lived, positively charged Xi-sub-c (Symbol Xi-sub-c^+) and a long-lived, negative pion (π-). The Xi-sub-c then promptly decays into a pair of long-lived pions and a Xi particle (Symbol pi^-), which lives long enough to leave a track in the silicon vertex system (SVX) of the CDF detector before it decays a pion and a Lambda (Λ). The Lambda particle, which has no electric charge, can travel several centimeters before decaying into a proton (p) and a pion (π). Credit: CDF collaboration.