study of $B^0 \to\phi K_s^0$ and $\Lambda_b \to \phi \Lambda$ decays at CDF

Using over $330$~pb$^{-1}$ of Run~II data collected by the CDF detector, we evaluate the prospects for reconstructing gluonic penguin decays $B^0 \to\phi K_s^0$ and $\Lambda_b \to \phi \Lambda$ in $p\bar{p}$ collisions at $\sqrt{s} = 1.96$~TeV. The $K_s^0\to\pi^+\pi^-$ and $\Lambda \to p^+\pi^-$ decays are reconstructed using a decidated algorithm, which is studied using $D^0 \to \phi K_s^0$ decays.