Precision measurement of the ${\Xi }_{cc}^{++}$ mass

Abstract

A measurement of the ${\Xi }_{cc}^{++}$ mass is performed using data collected by the LHCb experiment between 2016 and 2018 in $pp$ collisions at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.6 ${\mathrm{fb}}^{-1}$. The ${\Xi }_{cc}^{++}$ candidates are reconstructed via the decay modes ${\Xi }_{cc}^{++}\to {\Lambda }_c^{+}{K}^{-}{\pi }^{+}{\pi }^{+}$ and ${\Xi }_{cc}^{++}\to {\Xi }_c^{+}{\pi }^{+}$. The result, $3621.55\pm 0.23(\mathrm{stat})\pm 0.30(\mathrm{syst})\mathrm{MeV}/c^2$, is the most precise measurement of the ${\Xi }_{cc}^{++}$ mass to date.

All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2019-037.html

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