The observation of the bottom, strange baryon $\Xi0_b$
through the decay chain $\Xi0_b --> \Xi_c+ \, \pi+-$, where $\Xi_c+
--> \Xi- \, \pi++ \, \pi++$, $\Xi- --> \Lambda \, \pi+-$, and
$\Lambda --> p \, \pi+-$, is reported using data corresponding to
an integrated luminosity of 4.2 fb${-1}$ from $p\bar p$ collisions at
$s**(1/2)ÿ96$ TeV recorded with the Collider Detector at Fermilab. A
signal of $25.3{+5.6}_{-5.4}$ candidates is observed whose probability
of arising from a background fluctuation is $3.6 \times 10{-12}$,
corresponding to 6.8 Gaussian standard deviations. The $\Xi0_b$ mass is
measured to be $5787.8+-5.0(\textrm{stat})+-1.3(\textrm{syst})$ MeV/$c2$.
In addition, the $\Xi-_b$ baryon is observed through the process $\Xi-_b
--> \Xi_c0 \, \pi+-$, where $\Xi_c0 --> \Xi-\, \pi++$, $\Xi- -->
\Lambda \, \pi+-$, and $\Lambda --> p \, \pi+-$.
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Updated: Monday, 2012 January 30 15:21:16 CST automatically from input from "Stephanie A. Schuler"