Observation of the Bs 0→ J/ψϕϕ decay

The LHCb collaboration

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Resum

The Bs0 → J/ψϕϕ decay is observed in pp collision data corresponding to an integrated luminosity of 3 fb−1 recorded by the LHCb detector at centre-of-mass energies of 7 TeV and 8 TeV. This is the first observation of this decay channel, with a statistical significance of 15 standard deviations. The mass of the Bs0 meson is measured to be 5367.08 ± 0.38 ± 0.15 MeV/c2. The branching fraction ratio ℬ(Bs0 → J/ψϕϕ)/ℬ(Bs0 → J/ψϕ) is measured to be 0.0115 ± 0.0012− 0.0009+ 0.0005. In both cases, the first uncertainty is statistical and the second is systematic. No evidence for non-resonant Bs0 → J/ψϕK+K or Bs0 → J/ψK+KK+K decays is found.

Idioma originalAnglès
Número d’article40
RevistaJournal of High Energy Physics
Volum2016
Número3
DOIs
Estat de la publicacióPublicada - 1 de març 2016

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