pdgLive Home   >   Baryon Summary Table   >   ${{\mathit \Xi}_{{{c}}}{(2790)}}$

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.

Expand/Collapse All

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

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

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

▸  exp ${{\mathit \Xi}_{{{c}}}{(2790)}}&$ MASS DIFFERENCES

${\mathit m}_{{{\mathit \Xi}_{{{c}}}{(2790)}^{+}}}-{\mathit m}_{{{\mathit \Xi}_{{{c}}}^{'0}}}$ $213.2$ $\pm0.22$ MeV

${\mathit m}_{{{\mathit \Xi}_{{{c}}}{(2790)}^{0}}}-{\mathit m}_{{{\mathit \Xi}_{{{c}}}^{'+}}}$ $215.7$ $\pm0.22$ MeV

${{\mathit \Xi}_{{{c}}}{(2790)}^{+}}-{{\mathit \Xi}_{{{c}}}{(2790)}^{0}}$ MASS DIFFERENCE $-2.0$ $\pm0.7$ MeV

▸  exp ${{\mathit \Xi}_{{{c}}}{(2790)}}$ 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