2026-04-18T04:01:11Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/1193872025-12-05T16:38:45Zcom_2072_1057col_2072_478823col_2072_478904col_2072_478917

00925njm 22002777a 4500 dc Garrido Beltrán, Lluís author Gascón Fora, David author Graciani Díaz, Ricardo author Graugés Pous, Eugeni author Marin Benito, Carla author Picatoste Olloqui, Eduardo author Rives Molina, Vicente José author Badalov, Alexey author LHCb Collaboration author 2018-01-29T16:07:13Z 2018-01-29T16:07:13Z 2016-03-07 2018-01-29T16:07:13Z The B s 0  → 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 B s 0 meson is measured to be 5367.08 ± 0.38 ± 0.15 MeV/c2. The branching fraction ratio ℬ(B s 0  → J/ψϕϕ)/ℬ(B s 0  → 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 B s 0  → J/ψϕK + K − or B s 0  → J/ψK + K − K + K − decays is found. Interaccions d'hadrons Espectroscòpia Hadron interactions Spectrum analysis Observation of the Bs0→ J/ψϕϕ decay