First Observation of a Family of Double-Charm Baryons

Details First Observation of a Family of Double-Charm Baryons First Observation of a Family of Double-Charm Baryons

2002-09-27

arxiv.org/abs/hep-ex/0209075v1

Physics

High Energy Physics

High Energy Physics - Experiment

Talk at the 31st International Conference on High Energy Physics (ICHEP 2002), Amsterdam, July 24 - 31, 2002. To be published

Scientific paper

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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