Observation of five new narrow ${\Omega }_c^0$ states decaying to ${\Xi }_c^{+}{K}^{-}$

Abstract

The ${\Xi }_c^{+}{K}^{-}$ mass spectrum is studied with a sample of $pp$ collision data corresponding to an integrated luminosity of 3.3 fb${}^{-1}$, collected by the LHCb experiment. The ${\Xi }_c^{+}$ is reconstructed in the decay mode $p{K}^{-}{\pi }^{+}$. Five new, narrow excited ${\Omega }_c^0$ states are observed: the ${\Omega }_c(3000{)}^0$, ${\Omega }_c(3050{)}^0$, ${\Omega }_c(3066{)}^0$, ${\Omega }_c(3090{)}^0$, and ${\Omega }_c(3119{)}^0$. Measurements of their masses and widths are reported.

arXiv comment14 pages, 3 figures. All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2017-002.html

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