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 B+ mesons are reconstructed via the decays Bc+ → J/ψπ+, Bc+ → J/ψπ+π−π+, c Bc+ → J/ψppπ ¯ +, Bc+ → J/ψDs+, Bc+ → J/ψD0K+ 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/c2. 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/c2.
|Original language||English (US)|
|State||Published - Apr 17 2020|
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