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- Title
Precision measurement of the Bc+ meson mass.
- Authors
Aaij, R.; Abellán Beteta, C.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; Aidala, C. A.; Aiola, S.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; Alessio, F.; Alexander, M.; Alfonso Albero, A.; Alkhazov, G.; Alvarez Cartelle, P.; Alves, A. A.; Amato, S.; Amhis, Y.; An, L.
- Abstract
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 D0K+ 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/c2. 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.
- Subjects
PROTON-proton interactions; MESONS; HADRON-hadron scattering; MEASUREMENT
- Publication
Journal of High Energy Physics, 2020, Vol 2020, Issue 7, pN.PAG
- ISSN
1126-6708
- Publication type
Article
- DOI
10.1007/JHEP07(2020)123