Observation of the decay B¯0s→χc2K+K− in the ϕ mass region
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Abstract
The B¯0s→χc2K+K− decay mode is observed and its branching fraction relative to the corresponding χc1 decay mode, in a ±15 MeV/c2 window around the ϕ mass, is found to be
B(B¯0s→χc2K+K−)B(B¯0s→χc1K+K−)=(17.1±3.1±0.4±0.9)%,
where the first uncertainty is statistical, the second systematic and the third due to the knowledge of the branching fractions of radiative χc decays. The decay mode B¯0s→χc1K+K− allows the B0s mass to be measured as
m(B0s)=5366.83±0.25±0.27 MeV/c2,
where the first uncertainty is statistical and the second systematic. A combination of this result with other LHCb determinations of the B 0s mass is made.
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Bibliographic citation
Aaij, R., Adeva, B., Adinolfi, M. et al. Observation of the decay B¯0s→χc2K+K− in the ϕ mass region. J. High Energ. Phys. 2018, 191 (2018). https://doi.org/10.1007/JHEP08(2018)191
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https://doi.org/10.1007/JHEP08(2018)191Sponsors
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© CERN, for the benefit of the LHCb Collaboration. Article funded by SCOAP3. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.