The observation of the bottom, strange baryon 0
b through the decay chain 0
b
! þ
c , where þ
c
!
þþ, ! , and ! p, is reported by using data corresponding to an integrated
luminosity of 4:2 fb1 from pp collisions at ffisffiffi
p
¼ 1:96 TeV recorded with the Collider Detector at
Fermilab.