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

${{\mathit \Lambda}_{{{c}}}{(2765)}^{+}}$ $~$or ${{\mathit \Sigma}_{{{c}}}{(2765)}}$ $I(J^P)$ = $?(?^{?})$

A broad, statistically significant peak ($997$ ${}^{+141}_{-129}$ events) seen in ${{\mathit \Lambda}_{{{c}}}^{+}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$. However, nothing at all is known about its quantum numbers, including whether it is a ${{\mathit \Lambda}_{{{c}}}^{+}}$ or a ${{\mathit \Sigma}_{{{c}}}}$, or whether the width might be due to overlapping states.

${{\mathit \Lambda}_{{{c}}}{(2765)}^{+}}$ MASS

$2766.6 \pm2.4$ MeV

${{\mathit \Lambda}_{{{c}}}{(2765)}^{+}}–{{\mathit \Lambda}_{{{c}}}^{+}}$ MASS DIFFERENCE

$480.1 \pm2.4$ MeV

${{\mathit \Lambda}_{{{c}}}{(2765)}^{+}}$ WIDTH

$50$ MeV

${{\boldsymbol \Lambda}_{{{c}}}{(2765)}^{+}}$ DECAY MODES

$\Gamma_{1}$

${{\mathit \Lambda}_{{{c}}}^{+}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$

seen

356