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

${{\boldsymbol \Sigma}_{{c}}{(2455)}}$ $I(J^P)$ = $1(1/2^{+})$

The angular distribution of ${{\mathit B}^{-}}$ $\rightarrow$ ${{\mathit \Sigma}_{{c}}{(2455)}^{0}}{{\overline{\mathit p}}}$ favors $\mathit J = 1/2$ (as the quark model predicts). $\mathit J = 3/2$ is excluded by more than four standard deviations; see AUBERT 2008BN.

${{\boldsymbol \Sigma}_{{c}}{(2455)}}$ MASSES

${{\mathit \Sigma}_{{c}}{(2455)}^{++}}$ MASS

$2453.97 \pm0.14$ MeV

${{\mathit \Sigma}_{{c}}{(2455)}^{+}}$ MASS

$2452.9 \pm0.4$ MeV

${{\mathit \Sigma}_{{c}}{(2455)}^{0}}$ MASS

$2453.75 \pm0.14$ MeV

${{\boldsymbol \Sigma}_{{c}}{(2455)}}–{{\boldsymbol \Lambda}_{{c}}^{+}}$ MASS DIFFERENCES

${\mathit m}_{{{\mathit \Sigma}_{{c}}^{++}}}–{\mathit m}_{{{\mathit \Lambda}_{{c}}^{+}}}$

$167.510 \pm0.017$ MeV

${\mathit m}_{{{\mathit \Sigma}_{{c}}^{+}}}–{\mathit m}_{{{\mathit \Lambda}_{{c}}^{+}}}$

$166.4 \pm0.4$ MeV