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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/185474
First observation of B + → Ds + K + K − decays and a search for B + → Ds + ϕ decays
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A search for B+ → D+ s K+K− decays is performed using pp collision data corresponding to an integrated luminosity of 4.8 fb−1 , collected at centre-of-mass energies of 7, 8 and 13 TeV with the LHCb experiment. A significant signal is observed for the first time and the branching fraction is determined to be B(B + → D+ s K+K−) = (7.1 ± 0.5 ± 0.6 ± 0.7) × 10−6 , where the first uncertainty is statistical, the second systematic and the third due to the uncertainty on the branching fraction of the normalisation mode B+ → D+ sD 0 . A search is also performed for the pure annihilation decay B+ → D+ s φ. No significant signal is observed and a limit of B(B + → D+ s φ) < 4.9 × 10−7 (4.2 × 10−7 ) is set on the branching fraction at 95% (90%) confidence level. Keywords: B physics, Branching fraction, Hadron-Hadron scattering (experiments), Rare decay
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LHCb Collaboration, et al. First observation of B + → Ds + K + K − decays and a search for B + → Ds + ϕ decays. Journal of High Energy Physics. 2018. Vol. 2018, num. 1, pags. 1-22. ISSN 1126-6708. [consulted: 23 of May of 2026]. Available at: https://hdl.handle.net/2445/185474