Charmed baryon ($C=1$)

A baryon containing a charm quark. For one charm and two up/down quarks in the spatial ground state, light-diquark spin-isospin correlation gives the isosinglet Lambda c baryon and the isotriplet Sigma c baryon families.

The symmetric light pairs $uu,\{ud\},dd$ with one charm quark give isospin one and charges $2,1,0$. Their light spin is one; coupling the charm spin gives the $J=1/2$ Sigma c baryon triplet and $J=3/2$ excited-spin triplet conventionally marked by a star.

The lowest Lambda c baryon has valence content $cud$, electric charge $+1$, isospin zero and spin angular momentum $1/2$. Its light pair has antisymmetric flavour and spin zero. This is the charm analogue of the Lambda baryon.