Precise measurements of the properties of the B1(5721)0,+ and B2*(5747)0,+ states and observation of B+,0π−,+ mass structures

The LHCb Collaboration

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Abstract

Invariant mass distributions of B+π− and B0π+ combinations are investigated in order to study excited B mesons. The analysis is based on a data sample corresponding to 3.0 fb−1 of pp collision data, recorded by the LHCb detector at centre-of-mass energies of 7 and 8 TeV. Precise measurements of the masses and widths of the B1(5721)0,+ and B2(5747)0,+ states are reported. Clear enhancements, particularly prominent at high pion transverse momentum, are seen over background in the mass range 5850-6000 MeV in both B+π− and B0π+ combinations. The structures are consistent with the presence of four excited B mesons, labelled BJ (5840)0,+ and BJ (5960)0,+, whose masses and widths are obtained under different hypotheses for their quantum numbers.
Original languageEnglish
Number of pages27
JournalJournal of High Energy Physics
Volume2015
Issue number4
DOIs
Publication statusPublished - 2015
Externally publishedYes

Keywords

  • Spectroscopy
  • Hadron-Hadron Scattering
  • QCD
  • B physics
  • Flavor physics

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