Charmed baryon

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Charmed baryons are a category of composite particles comprising all baryons made of at least one charm quark. Since their first observation in the 1970s, a large number of distinct charmed baryon states have been identified. Observed charmed baryons have masses ranging between 2300 and 2700 MeV/c². In 2002, the SELEX collaboration, based at Fermilab published evidence of a doubly charmed baryon (
Ξ
_cc), containing two charm quarks) with a mass of ~3520 MeV/c², but has yet to be confirmed by other experiments. One triply charmed baryon (
Ω
_ccc) has been predicted but not yet observed.