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Model-independent evidence for J /ψp contributions to Λb0 →j /ψpK- decays
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The data sample of Λ0b→J/ψpK− decays acquired with the LHCb detector from 7 and 8 TeV pp collisions, corresponding to an integrated luminosity of 3 fb−1, is inspected for the presence of J/ψp or J/ψK− contributions with minimal assumptions about K−p contributions. It is demonstrated at more than nine standard deviations that Λ0b→J/ψpK− decays cannot be described with K−p contributions alone, and that J/ψp contributions play a dominant role in this incompatibility. These model-independent results support the previously obtained model-dependent evidence for P+c→J/ψp charmonium-pentaquark states in the same data sample.
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GASCÓN FORA, David, et al. Model-independent evidence for J /ψp contributions to Λb0 →j /ψpK- decays. Physical Review Letters. 2016. Vol. 117, num. 82002. ISSN 0031-9007. [consulted: 30 of June of 2026]. Available at: https://hdl.handle.net/2445/112076