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Precision measurement of the Bc+ meson mass
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Precision measurement of the Bc+ meson mass
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Precision measurement of the Bc+ meson mass
Precision measurement of the Bc+ meson mass
Journal Article

Precision measurement of the Bc+ meson mass

2020
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Overview
A bstract 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/ψπ + , B c + → J/ψπ + π − π + , B c + → J / ψp p ¯ π + , B c + → J / ψ D s + , B c + → J/ψ D 0 K + and B c + → B s 0 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 /c 2 . This is the most precise measurement of the B c + mass to date. The difference between the B c + and B s 0 meson masses is measured to be 907 . 75 ± 0 . 37 (stat) ± 0 . 27 (syst) MeV /c .