pdgLive

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

${{\boldsymbol \Xi}_{{c}}{(2790)}}$

$I(J^P)$ = $1/2(1/2^{-})$

Seen in ${{\mathit \Xi}_{{c}}^{\,'}}{{\mathit \pi}}$ decays. The simplest assignment, based on the mass, width, and decay mode, is that this belongs in the same SU(4) multiplet as the ${{\mathit \Lambda}{(1405)}}$ and the ${{\mathit \Lambda}_{{c}}{(2595)}^{+}}$, but the spin and parity have not been measured.

${{\boldsymbol \Xi}_{{c}}{(2790)}}$ MASSES

${{\mathit \Xi}_{{c}}{(2790)}^{+}}$ MASS

$2791.9 \pm0.5$ MeV

${{\mathit \Xi}_{{c}}{(2790)}^{0}}$ MASS

$2793.9 \pm0.5$ MeV

${{\boldsymbol \Xi}_{{c}}{(2790)}}–{{\boldsymbol \Xi}_{{c}}^{\,'}}$ MASS DIFFERENCES

${\mathit m}_{{{\mathit \Xi}_{{c}}{(2790)}^{+}}}–{\mathit m}_{{{\mathit \Xi}_{{c}}^{'0}}}$

$213.20 \pm0.22$ MeV

${\mathit m}_{{{\mathit \Xi}_{{c}}{(2790)}^{0}}}–{\mathit m}_{{{\mathit \Xi}_{{c}}^{'+}}}$

$215.70 \pm0.22$ MeV

${{\mathit \Xi}_{{c}}{(2790)}^{+}}–{{\mathit \Xi}_{{c}}{(2790)}^{0}}$ MASS DIFFERENCE

$-2.0 \pm0.7$ MeV