Charmed baryons
(重定向自Charmed baryon)
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 and 2300 MeV/c. In 2002, the SELEX collaboration, based at Fermilab published evidence of a doubly charmed baryon ( 2700Ξ
cc), containing two charm quarks) with a mass of ~ MeV/c, but has yet to be confirmed by other experiments. One triply charmed baryon ( 3520Ω
ccc) has been predicted but not yet observed.