The search for the $\Phi(1860)^{--}$ pentaquark with CLAS

A search for a narrow exotic resonance, the $\Phi(1860)^{--}$, is being conducted in the EG3 experiment with the CLAS detector at Jefferson Lab. The $\Phi(1860)^{--}$ is predicted to be the $S=-2$ exotic state in the pentaquark anti-decuplet. Evidence for this state has been cited by the NA49 experiment, but has not been confirmed so far. The search is conducted by looking for the decay $\Phi(1860)^{--} \to \Xi^{-}\pi^{-}$, which can use the detached vertices of the $\Xi^{-} \to \Lambda \pi^{-}$ and $\Lambda \to p \pi^{-}$ decay chain, a new technique for CLAS. We will report on the ongoing analysis.