Observation of the B s 0 → J/ψϕϕ decay

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Observation of the B s 0 → J/ψϕϕ decay

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Aaij2016_Article_ObservationOfTheBs0JΨϕϕDecay.pdf

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Date Issued

2016

Journal

Journal of High Energy Physics

Publisher

Springer Science and Business Media LLC

Citation

Aaij, R., et al. "Observation of the B (S) (0) -> Aeuro Parts Per Thousand J/Psi I Center Dot I Center Dot Decay." Journal of High Energy Physics 3 (2016): 1-18.

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Final published version

Abstract

© 2016, The Author(s). 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.

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Creative Commons Attribution 4.0 International license

https://creativecommons.org/licenses/by/4.0/

Persistent DSpace Link

https://hdl.handle.net/1721.1/134096

DOI of Published Version

10.1007/JHEP03(2016)040