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


Creative Commons License

Aaij R., Adeva B., Adinolfi M., Affolder A., Ajaltouni Z., Akar S., ...More

Journal of High Energy Physics, vol.2015, no.4, 2015 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 2015 Issue: 4
  • Publication Date: 2015
  • Doi Number: 10.1007/jhep04(2015)024
  • Journal Name: Journal of High Energy Physics
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Keywords: Spectroscopy, Hadron-Hadron Scattering, QCD, B physics, Flavor physics
  • Open Archive Collection: AVESIS Open Access Collection
  • Manisa Celal Bayar University Affiliated: Yes

Abstract

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.[Figure not available: see fulltext.]