BaBar Searches for Double Charm Baryons

We present the results of searches for $\Xi_{cc}^+\rightarrow \Lambda_c^+ K^- \pi^+$ and $\Xi_{cc}^{++}\rightarrow \Lambda_c^+ K^- \pi^+ \pi^+$. The decay $\Lambda_c(2880)\rightarrow \Lambda_c^+ \pi^- \pi^+$ is used as a control and reference mode. We search wide mass regions for the $\Xi_{cc} ^+$ and \Xi_{cc}^{++}$ baryons that include several previously reported signals and theoretical predictions. Experimentally observing double charm baryons is a major step in scrutinizing predictions involving diquarks in theoretical QCD. Our data set was collected with the BaBar detector at the PEP-II $e^+e^-$ storage rings and consists of 210 fb$^{-1}$ collected on the $\Upsilon(4S)$ resonance, and 22 fb$^{-1}$ collected approximately 40 MeV below this resonance.