Speaker
Mr
Jesus Orduna
(CINVESTAV Mexico)
Please give a brief summary of your poster
We report the observation of the doubly strange $b$ baryon $\Omega^-_b$ in
the decay channel $\Omega^-_b \to J/\psi \Omega^-$, with $J/\psi \to \mu^+
\mu^-$ and $\Omega^- \to \Lambda K^- \to (p \pi^-) K^- $, in $p \bar{p}$
collisions at $\sqrt{s} = 1.96$ TeV.
Using approximately 1.3 fb$^{-1}$ of data collected with the D0 detector at
the Fermilab Tevatron Collider, we observe 17.8 $\pm$ 4.9 (stat) $\pm$ 0.8
(syst) $\Omega^-_b$ signal events at a mass of 6.165 $\pm$ 0.010 (stat)
$\pm$ 0.013 (syst) GeV. The significance of the observed signal is 5.4 $\sigma$,
corresponding to a probability of $6.7 \times 10^{-8}$ of it arising from a
background fluctuation.
Primary author
Mr
Jesus Orduna
(CINVESTAV Mexico)
