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

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

$I(J^P)$ = $1(3/2^{+})$
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
${{\mathit \Lambda}_{{c}}^{+}}{{\mathit \pi}}$ is the only strong decay allowed to a ${{\mathit \Sigma}_{{c}}}$ having this mass.
 $\Gamma_{1}$ ${{\mathit \Lambda}_{{c}}^{+}}{{\mathit \pi}}$ $\approx{}100\%$ 179
 FOOTNOTES