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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   JSON PDGID: B104

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

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

${\mathit m}_{{{\mathit \Sigma}_{{{c}}}{(2455)}^{0}}}–{\mathit m}_{{{\mathit \Lambda}_{{{c}}}^{+}}}$   $167.290 \pm0.017$ MeV

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

${\mathit m}_{{{\mathit \Sigma}_{{{c}}}{(2455)}^{++}}}–{\mathit m}_{{{\mathit \Sigma}_{{{c}}}{(2455)}^{0}}}$   $0.220 \pm0.013$ MeV

${\mathit m}_{{{\mathit \Sigma}_{{{c}}}{(2455)}^{+}}}–{\mathit m}_{{{\mathit \Sigma}_{{{c}}}{(2455)}^{0}}}$   $-1.10 {}^{+0.16}_{-0.08}$ MeV

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

${{\mathit \Sigma}_{{{c}}}{(2455)}^{++}}$ WIDTH   $1.89 {}^{+0.09}_{-0.18}$ MeV (S = 1.1)

${{\mathit \Sigma}_{{{c}}}{(2455)}^{+}}$ WIDTH   $2.3 \pm0.4$ MeV

${{\mathit \Sigma}_{{{c}}}{(2455)}^{0}}$ WIDTH   $1.83 {}^{+0.11}_{-0.19}$ MeV (S = 1.2)

${{\mathit \Sigma}_{{{c}}}{(2455)}}$ DECAY MODES
${{\mathit \Lambda}_{{{c}}}^{+}}{{\mathit \pi}}$ is the only strong decay allowed to a ${{\mathit \Sigma}_{{{c}}}}$ having this mass.
Mode   Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/ Conf. Level P(MeV/c)   $\Gamma_{1}$ ${{\mathit \Lambda}_{{{c}}}^{+}}{{\mathit \pi}}$   $\approx{}100\%$ 94
FOOTNOTES