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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: B149

${{\mathit \Xi}_{{{c}}}{(2790)}}$ $I(J^P)$ = $1/2(1/2^{-})$

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.

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

${{\mathit \Xi}_{{{c}}}{(2790)}^{+}}$ MASS   $2791.9 \pm0.5$ MeV

${{\mathit \Xi}_{{{c}}}{(2790)}^{0}}$ MASS   $2793.9 \pm0.5$ MeV

${{\mathit \Xi}_{{{c}}}{(2790)}}–{{\mathit \Xi}_{{{c}}}^{\,'}}$ 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

${{\mathit \Xi}_{{{c}}}{(2790)}}$ WIDTHS

${{\mathit \Xi}_{{{c}}}{(2790)}^{+}}$ WIDTH   $8.9 \pm1.0$ MeV

${{\mathit \Xi}_{{{c}}}{(2790)}^{0}}$ WIDTH   $10.0 \pm1.1$ MeV

${{\mathit \Xi}_{{{c}}}{(2790)}}$ DECAY MODES
Mode   Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/ Conf. Level P(MeV/c)   $\Gamma_{1}$ ${{\mathit \Xi}_{{{c}}}^{\,'}}{{\mathit \pi}}$   seen 159   $\Gamma_{2}$ ${{\mathit \Xi}_{{{c}}}^{0}}{{\mathit \gamma}}$   303   $\Gamma_{3}$ ${{\mathit \Xi}_{{{c}}}^{+}}{{\mathit \gamma}}$   305   $\Gamma_{4}$ ${{\mathit \Lambda}_{{{c}}}^{+}}{{\mathit K}^{-}}$   seen 98
FOOTNOTES