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

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B119D

VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT $\bf{ 305.79 \pm0.24}$ OUR FIT $305.79$ $\pm0.14$ $\pm0.20$ 3.5k AALTONEN 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 BLECHMAN 2003 Threshold shift $309.7$ $\pm0.9$ $\pm0.4$ 19 ALBRECHT 1997 ARG ${{\mathit e}^{+}}{{\mathit e}^{-}}$ $\approx{}$ 10 GeV $309.2$ $\pm0.7$ $\pm0.3$ $14$ $\pm4.5$ FRABETTI 1996 E687 ${{\mathit \gamma}}{}^{}\mathrm {Be}$, ${{\overline{\mathit E}}}_{\gamma }\approx{}$ 220 GeV $307.5$ $\pm0.4$ $\pm1.0$ $112$ $\pm17$ EDWARDS 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 ${{\mathit \Lambda}_{{c}}^{+}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$