Search for the doubly heavy Ξ0bc baryon via decays to D0pK−

LHCb Collaboration

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Abstract

A search for the doubly heavy Ξbc0 baryon using its decay to the D 0pK final state is performed using proton-proton collision data at a centre-of-mass energy of 13 TeV collected by the LHCb experiment between 2016 and 2018, corresponding to an integrated luminosity of 5.4 fb −1. No significant signal is found in the invariant mass range from 6.7 to 7.2 GeV/c 2. Upper limits are set at 95% credibility level on the ratio of the Ξbc0 production cross-section times its branching fraction to D 0pK relative to that of the Λb0→D0pK− decay. The limits are set as a function of the Ξbc0 mass and lifetime hypotheses, in the rapidity range from 2.0 to 4.5 and in the transverse momentum region from 5 to 25 GeV/c. Upper limits range from 1.7 × 10 −2 to 3.0 × 10 −1 for the considered Ξbc0 mass and lifetime hypotheses. [Figure not available: see fulltext.]

Original languageEnglish
Article number95
JournalJournal of High Energy Physics
Volume2020
Issue number11
DOIs
Publication statusPublished - 19-Nov-2020

Keywords

  • WEAK DECAYS
  • SUM-RULES
  • XI(0)(BC)
  • MASSES
  • XI(BC)
  • TOOL
  • Spectroscopy
  • B physics
  • QCD
  • Hadron-Hadron scattering (experiments)
  • Heavy quark production

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