SelEX: Recent progress in the analysis of charm-strange and double-charm baryons

SELEX is still the only experiment observing double charm baryons. We published observations on two different decays modes, Ξ%2bcc → Λ%2bc K−π%2b [5] and Ξ%2bcc → pD%2bK− [12]. After a re-analysis of our full data set, with improved efficiency and resolution, we presented here a higher-statistics observation of Ξ%2bcc → Λ%2bc K−π%2b, and a re-analysis of the Ξcc(3780)%2b%2b. The new analysis also allows access to additional decay modes, and we presented here the first observation of Ξ%2bcc → Ξ%2bc π−π%2b. SELEX will continue the line of analysis, by first publishing these preliminary results. We will try to measure the lifetime of the Ξ%2bcc. We will also seek the isospinpartner of the Ξ%2bcc, the Ξ%2b%2bcc in all corresponding decay modes around 3500 MeV/c. © HQL 2006.

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