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

INSPIRE search

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

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.

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

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

$2453.97 \pm0.14$ MeV

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

$2452.65 {}^{+0.22}_{-0.16}$ MeV

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

$2453.75 \pm0.14$ MeV

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

${\mathit m}_{{{\mathit \Sigma}_{{{c}}}{(2455)}^{++}}}–{\mathit m}_{{{\mathit \Lambda}_{{{c}}}^{+}}}$

$167.510 \pm0.017$ MeV

${\mathit m}_{{{\mathit \Sigma}_{{{c}}}{(2455)}^{+}}}–{\mathit m}_{{{\mathit \Lambda}_{{{c}}}^{+}}}$

$166.19 {}^{+0.16}_{-0.08}$ MeV