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Observation of the Bs0 → J/ψϕϕ decay
- The LHCb collaboration;
- Aaij, R;
- Adeva, B;
- Adinolfi, M;
- Affolder, A;
- Ajaltouni, Z;
- Akar, S;
- Albrecht, J;
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- Alexander, M;
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- Amerio, S;
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- Appleby, RB;
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Published Web Location
http://doi.org/10.1007/JHEP03(2016)040No data is associated with this publication.
Abstract
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+K−K+K− decays is found.