Well, Cascade is the name of the particle, not the symbol... (and it would normally be upper-case, no?) for non-physicists: https://en.wikipedia.org/wiki/Xi_ba

Well, Cascade is the name of the particle, not the symbol... (and it would normally be upper-case, no?) for non-physicists: https://en.wikipedia.org/wiki/Xi_baryon https://en.wikipedia.org/wiki/Xi_baryon Also, for this reason, surprised it's one of the more rarely used Greek symbols...