Search for beautiful tetraquarks in the ϒ(1S+μ invariant-mass spectrum

The LHCb Collaboration

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Abstract

The ϒ(1S)μ+μ− invariant-mass distribution is investigated for a possible exotic meson state composed of two b quarks and two b¯ quarks, Xb b¯ b b¯. The analysis is based on a data sample of pp collisions recorded with the LHCb detector at centre-of-mass energies s=7, 8 and 13 TeV, corresponding to an integrated luminosity of 6.3 fb−1. No significant excess is found, and upper limits are set on the product of the production cross-section and the branching fraction as functions of the mass of the Xb b¯ b b¯ state. The limits are set in the fiducial volume where all muons have pseudorapidity in the range [2.0, 5.0], and the Xb b¯ b b¯ state has rapidity in the range [2.0, 4.5] and transverse momentum less than 15 GeV/c.
Original languageEnglish
Article number86
Number of pages22
JournalJournal of High Energy Physics
Volume2018
Issue number10
DOIs
Publication statusPublished - 2018
Externally publishedYes

Keywords

  • B physics
  • Exotics
  • Hadron-Hadron scattering (experiments)
  • Heavy quark production

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