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arxiv: hep-ex/0209075 · v1 · submitted 2002-09-27 · ✦ hep-ex

First Observation of a Family of Double-Charm Baryons

classification ✦ hep-ex
keywords baryonslambdacabibbo-allowedcandidatesconsiderationsconsistentdecaydecaying
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The SELEX experiment (E781) at Fermilab has candidates for high mass states decaying to Lambda_c+ K- pi+ and Lambda_c+ K- pi+ pi+, Cabibbo-allowed decay modes of doubly-charmed baryons Xi_cc+ and Xi_cc++. The masses are consistent with theoretical considerations, but the spectroscopy is surprising. Limited lifetime information suggests that tau_{Xi_cc++} \sim tau_{Xi_cc+}.

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