Observation of the decay $ {\overline{B}}_s^0\to {\chi}_{c2}{K}^{+}{K}^{-} $ in the ϕ mass region

R. Aaij, B. Adeva, M. Adinolfi, C. A. Aidala, Z. Ajaltouni, S. Akar, P. Albicocco, J. Albrecht, F. Alessio, M. Alexander, A. Alfonso Albero, S. Ali (+819 others)
2018
Observation of the decay B 0 s → χ c2 K + K − in the φ mass region LHCb collaboration † Abstract The B 0 s → χ c2 K + K − decay mode is observed and its branching fraction relative to the corresponding χ c1 decay mode, in a ±15 MeV/c 2 window around the φ mass, is found to be where the first uncertainty is statistical, the second systematic and the third due to the knowledge of the branching fractions of radiative χ c decays. The decay mode B 0 s → χ c1 K + K − allows the B 0 s mass to be
more » ... ed as m(B 0 s ) = 5366.83 ± 0.25 ± 0.27 MeV/c 2 , where the first uncertainty is statistical and the second systematic. A combination of this result with other LHCb determinations of the B 0 s mass is made. Published as JHEP 08 (2018) 191. c 2018 CERN for the benefit of the LHCb collaboration. CC-BY-4.0 licence. † Authors are listed at the end of this paper. ii 1 The inclusion of charge-conjugate processes is implied throughout this paper.
doi:10.18154/rwth-2020-10879 fatcat:3lttr2xs4jcz5atxqtoyyxl5yi