Precision measurement of the B+c meson mass

LHCb collaboration, S. Playfer

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

A precision measurement of the B+c 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 B+c mesons are reconstructed via the decays B+c → J/ψ π+, B+
c → J/ψ π+π−π+, B+c → J/ψ p¯pπ+, B+c → J/ψ D+s , B+c → J/ψ D0K+ and B+
c → B0s π+. Combining the results of the individual decay channels, the B+
c mass is measured to be 6274.47 ± 0.27 (stat) ± 0.17 (syst) MeV/c2. This is the most precise measurement of the B+c mass to date. The difference between the
B+c and B0s meson masses is measured to be 907.75 ± 0.37 (stat) ± 0.27 (syst) MeV/c2.
Original languageEnglish
Article number123
Pages (from-to)1-20
Number of pages20
Journal Journal of High Energy Physics
Issue number7
Publication statusPublished - 20 Jul 2020

Keywords / Materials (for Non-textual outputs)

  • B physics
  • Hadron-Hadron scattering (experiments)
  • QCD
  • Spectroscopy


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