#### ${{\boldsymbol \Lambda}_{{c}}{(2595)}^{+}}–{{\boldsymbol \Lambda}_{{c}}^{+}}$ MASS DIFFERENCE

VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT
 $\bf{ 305.79 \pm0.24}$ OUR FIT
$305.79$ $\pm0.14$ $\pm0.20$ 3.5k
 2011 H
CDF ${{\mathit p}}{{\overline{\mathit p}}}$ at 1.96 TeV
• • We do not use the following data for averages, fits, limits, etc. • •
$305.6$ $\pm0.3$ 1
 2003
Threshold shift
$309.7$ $\pm0.9$ $\pm0.4$ 19
 1997
ARG ${{\mathit e}^{+}}{{\mathit e}^{-}}$ $\approx{}$ 10 GeV
$309.2$ $\pm0.7$ $\pm0.3$ $14$ $\pm4.5$
 1996
E687 ${{\mathit \gamma}}{}^{}\mathrm {Be}$, ${{\overline{\mathit E}}}_{\gamma }\approx{}$ 220 GeV
$307.5$ $\pm0.4$ $\pm1.0$ $112$ $\pm17$
 1995
CLE2 ${{\mathit e}^{+}}{{\mathit e}^{-}}$ $\approx{}$ $10.5$ GeV
 1 BLECHMAN 2003 finds that a more sophisticated treatment than a simple Breit-Wigner for the proximity of the threshold of the dominant decay, ${{\mathit \Sigma}_{{c}}{(2455)}}{{\mathit \pi}}$ , lowers the ${{\mathit \Lambda}_{{c}}{(2595)}^{+}}–{{\mathit \Lambda}_{{c}}^{+}}$ mass difference by 2 or 3 MeV. The analysis of AALTONEN 2011H bears this out.
References:
 AALTONEN 2011H
PR D84 012003 Measurements of the Properties of ${{\mathit \Lambda}_{{c}}{(2595)}}$, ${{\mathit \Lambda}_{{c}}{(2625)}}$, ${{\mathit \Sigma}_{{c}}{(2455)}}$, and ${{\mathit \Sigma}_{{c}}{(2520)}}$ Baryons
 BLECHMAN 2003
PR D67 074033 Threshold Effects in Excited Charmed Baryon Decay
 ALBRECHT 1997
PL B402 207 Evidence for ${{\mathit \Lambda}_{{c}}{(2593)}^{+}}$ Production
 FRABETTI 1996
PL B365 461 Study of Higher Mass Charm Baryons Decaying to ${{\mathit \Lambda}_{{c}}^{+}}$
 EDWARDS 1995
PRL 74 3331 Observation of Excited Charmed Baryon States Decaying to ${{\mathit \Lambda}_{{c}}^{+}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$