X(3872) discovery was confirmed with the CDF II detector in pbar
p collisions. We measure its mass to be 3871.3 +/- 0.7 +/- 0.4 GeV/c2.
The source of X-mesons in the large CDF sample is resolved by studying their
vertex displacement. We find 16.1 +/- 4.9 +/- 2.0% comes from decays of
b-hadrons, and the remainder from prompt sources: either direct production
or by decay of (unknown) short-lived particles. The mix of production
sources is similar to that observed for the psi(2S) charmonium state.