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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

${{\mathit \Sigma}_{{c}}{(2520)}}$ $I(J^P)$ = $1(3/2^{+})$

Seen in the ${{\mathit \Lambda}_{{c}}^{+}}{{\mathit \pi}^{\pm}}$ mass spectrum. The natural assignment is that this is the $\mathit J{}^{P} = 3/2{}^{+}$ excitation of the ${{\mathit \Sigma}_{{c}}{(2455)}}$ , the charm counterpart of the ${{\mathit \Sigma}{(1385)}}$ , but neither $\mathit J$ nor ${}^{P}$ has been measured.

${{\mathit \Sigma}_{{c}}{(2520)}}$ MASSES

${{\mathit \Sigma}_{{c}}{(2520)}^{++}}$ MASS   $2518.41 {}^{+0.22}_{-0.18}$ MeV (S = 1.1)

${{\mathit \Sigma}_{{c}}{(2520)}^{+}}$ MASS   $2517.4 {}^{+0.7}_{-0.5}$ MeV

${{\mathit \Sigma}_{{c}}{(2520)}^{0}}$ MASS   $2518.48 \pm0.20$ MeV (S = 1.1)

${{\mathit \Sigma}_{{c}}{(2520)}}$ MASS DIFFERENCES

${\mathit m}_{{{\mathit \Sigma}_{{c}}{(2520)}^{++}}}–{\mathit m}_{{{\mathit \Lambda}_{{c}}^{+}}}$   $231.95 {}^{+0.18}_{-0.12}$ MeV (S = 1.3)

${\mathit m}_{{{\mathit \Sigma}_{{c}}{(2520)}^{+}}}–{\mathit m}_{{{\mathit \Lambda}_{{c}}^{+}}}$   $230.9 {}^{+0.7}_{-0.5}$ MeV

${\mathit m}_{{{\mathit \Sigma}_{{c}}{(2520)}^{0}}}–{\mathit m}_{{{\mathit \Lambda}_{{c}}^{+}}}$   $232.02 {}^{+0.16}_{-0.14}$ MeV (S = 1.3)

${\mathit m}_{{{\mathit \Sigma}_{{c}}{(2520)}^{++}}}–{\mathit m}_{{{\mathit \Sigma}_{{c}}{(2520)}^{0}}}$   $0.01 \pm0.15$ MeV

${{\mathit \Sigma}_{{c}}{(2520)}}$ WIDTHS

${{\mathit \Sigma}_{{c}}{(2520)}^{++}}$ WIDTH   $14.78 {}^{+0.30}_{-0.40}$ MeV

${{\mathit \Sigma}_{{c}}{(2520)}^{+}}$ WIDTH   $17.2 {}^{+4.0}_{-2.2}$ MeV

${{\mathit \Sigma}_{{c}}{(2520)}^{0}}$ WIDTH   $15.3 {}^{+0.4}_{-0.5}$ MeV

${{\mathit \Sigma}_{{c}}{(2520)}}$ 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)   $\Gamma_{1}$ ${{\mathit \Lambda}_{{c}}^{+}}{{\mathit \pi}}$   $\approx{}100\%$ 179
FOOTNOTES