pdgLive Home   >   Baryon Summary Table   >   ${{\mathit \Lambda}_{{c}}{(2765)}^{+}}$ $~$or ${{\mathit \Sigma}_{{c}}{(2765)}}$

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  (beta) PDGID: B150

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

Decay Modes
Mode   Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/ Conf. Level P(MeV/c)   $\Gamma_{1}$ ${{\mathit \Lambda}_{{c}}^{+}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$   seen 356
FOOTNOTES