Precision measurement of the B+c meson mass

LHCb collaboration

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

A precision measurement of the Bc+ meson mass is performed using proton- proton collision data collected with the LHCb experiment at centre-of-mass energies of 7, 8 and 13 TeV, corresponding to a total integrated luminosity of 9.0 fb −1. The Bc+ mesons are reconstructed via the decays Bc+→ J/ψπ +, Bc+→ J/ψπ +π π +, Bc+→J/ψpp¯π+, Bc+→J/ψDs+, Bc+→ J/ψ D 0K + and Bc+→Bs0π+. Combining the results of the individual decay channels, the Bc+ mass is measured to be 6274.47 ± 0.27 (stat) ± 0.17 (syst) MeV/c 2. This is the most precise measurement of the Bc+ mass to date. The difference between the Bc+ and Bs0 meson masses is measured to be 907.75 ± 0.37 (stat) ± 0.27 (syst) MeV/c. [Figure not available: see fulltext.]

Original languageEnglish
Article number123
Number of pages21
JournalJournal of High Energy Physics
Volume2020
Issue number7
DOIs
Publication statusPublished - 20 Jul 2020

Keywords

  • b physics
  • b-c spectroscopy
  • charm
  • decays
  • hadron-hadron scattering (experiments)
  • qcd
  • search
  • spectroscopy
  • Spectroscopy
  • Hadron-Hadron scattering (experiments)
  • SEARCH
  • CHARM
  • DECAYS
  • B physics
  • QCD
  • B-C SPECTROSCOPY

Cite this