CHARMED BARYONS
($\boldsymbol C$ = $+1$)
${{\mathit \Lambda}_{{c}}^{+}}$ = ${{\mathit u}}{{\mathit d}}{{\mathit c}}$ , ${{\mathit \Sigma}_{{c}}^{++}}$ = ${{\mathit u}}{{\mathit u}}{{\mathit c}}$ , ${{\mathit \Sigma}_{{c}}^{+}}$ = ${{\mathit u}}{{\mathit d}}{{\mathit c}}$ , ${{\mathit \Sigma}_{{c}}^{0}}$ = ${{\mathit d}}{{\mathit d}}{{\mathit c}}$ ,
${{\mathit \Xi}_{{c}}^{+}}$ = ${{\mathit u}}{{\mathit s}}{{\mathit c}}$ , ${{\mathit \Xi}_{{c}}^{0}}$ = ${{\mathit d}}{{\mathit s}}{{\mathit c}}$ , ${{\mathit \Omega}_{{c}}^{0}}$ = ${{\mathit s}}{{\mathit s}}{{\mathit c}}$

INSPIRE search

${{\boldsymbol \Xi}_{{c}}{(2645)}}$ $I(J^P)$ = $1/2(3/2^{+})$

The natural assignment is that this is the $\mathit J{}^{P} = 3/2{}^{+}$ excitation of the ${{\mathit \Xi}_{{c}}}$ in the same SU(4) multiplet as the ${{\mathit \Delta}{(1232)}}$, but the quantum numbers have not been measured.

${{\boldsymbol \Xi}_{{c}}{(2645)}}$ MASSES

${{\mathit \Xi}_{{c}}{(2645)}^{+}}$ MASS

$2645.56 {}^{+0.24}_{-0.30}$ MeV

${{\mathit \Xi}_{{c}}{(2645)}^{0}}$ MASS

$2646.38 {}^{+0.20}_{-0.23}$ MeV (S = 1.1)

${{\boldsymbol \Xi}_{{c}}{(2645)}}–{{\boldsymbol \Xi}_{{c}}}$ MASS DIFFERENCES

${\mathit m}_{{{\mathit \Xi}_{{c}}{(2645)}^{+}}}–{\mathit m}_{{{\mathit \Xi}_{{c}}^{0}}}$

$174.66 \pm0.09$ MeV

${\mathit m}_{{{\mathit \Xi}_{{c}}{(2645)}^{0}}}–{\mathit m}_{{{\mathit \Xi}_{{c}}^{+}}}$

$178.44 \pm0.10$ MeV

${{\mathit \Xi}_{{c}}{(2645)}^{+}}–{{\mathit \Xi}_{{c}}{(2645)}^{0}}$ MASS DIFFERENCE

$-0.82 \pm0.26$ MeV