${{\mathit \Xi}_{{cc}}^{+}}$ MASS

INSPIRE search
VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 3518.9 \pm0.9}$ OUR AVERAGE
$3518$ $\pm3$ 6 1
OCHERASHVILI
2005
SELX ${{\mathit \Sigma}^{-}}$ nucleus $\approx{}$600 GeV
$3519$ $\pm1$ 16 2
MATTSON
2002
SELX ${{\mathit \Sigma}^{-}}$ nucleus $\approx{}$600 GeV
• • We do not use the following data for averages, fits, limits, etc. • •
$3623.0$ $\pm1.4$ $368$ $\pm193$ 3
AAIJ
2021AE
LHCB ${{\mathit p}}{{\mathit p}}$ at 7, 8, 13 TeV
1  OCHERASHVILI 2005 claims “an excess of 5.62 events over ... $1.38$ $\pm0.13$ events” for a significance of 4.8~$\sigma $ in ${{\mathit p}}{{\mathit D}^{+}}{{\mathit K}^{-}}$ events.
2  MATTSON 2002 claims “an excess of 15.9 events over an expected background of $6.1$ $\pm0.5$ events, a statistical significance of $6.3$ $\sigma $” in the ${{\mathit \Lambda}_{{c}}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}$ invariant-mass spectrum. The probability that the peak is a fluctuation increases from $1.0 \times 10^{-6}$ to $1.1 \times 10^{-4}$ when the number of bins searched is considered.
3  Uncertainties are statistical only. Because of undetermined systematic uncertainties in the extraction of this result it cannot be considered a mass measurement. AAIJ 2021AE performs a combined fit to its ${{\mathit \Xi}_{{cc}}^{+}}$ $\rightarrow$ ${{\mathit \Xi}_{{c}}^{+}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ data and the ${{\mathit \Xi}_{{cc}}^{+}}$ $\rightarrow$ ${{\mathit \Lambda}_{{c}}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}$ data from AAIJ 2020AX, finding a global significance of 2.9 $\sigma $ (4.0 $\sigma $ local).
References:
AAIJ 2021AE
JHEP 2112 107
OCHERASHVILI 2005
PL B628 18 Confirmation of the Doubly Charmed Baryon ${{\mathit \Xi}_{{cc}}{(3520)}^{+}}$ via its Decay to ${{\mathit p}}{{\mathit D}^{+}}{{\mathit K}^{-}}$
MATTSON 2002
PRL 89 112001 First Observation of the Doubly Charmed Baryon ${{\mathit \Xi}_{{cc}}^{+}}$