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cc-by (c) Aaij, R. et al., 2020
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/175063

Measurement off f(s)/f(u) Variation with Proton-Proton Collision Energy and B-Meson Kinematics

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The ratio of the B0s and B+ fragmentation fractions fs and fu is studied with B0s→J/ψϕ and B+→J/ψK+ decays using data collected by the LHCb experiment in proton-proton collisions at 7, 8, and 13 TeV center-of-mass energies. The analysis is performed in bins of B-meson momentum, longitudinal momentum, transverse momentum, pseudorapidity, and rapidity. The fragmentation-fraction ratio fs/fu is observed to depend on the B-meson transverse momentum with a significance of 6.0σ. This dependency is driven by the 13 TeV sample (8.7σ), while the results for the other collision energies are not significant when considered separately. Furthermore, the results show a 4.8σ evidence for an increase of fs/fu as a function of collision energy.

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ALFONSO ALBERO, Alejandro, et al. Measurement off f(s)/f(u) Variation with Proton-Proton Collision Energy and B-Meson Kinematics. Physical Review Letters. 2020. Vol. 124, núm. 12, pàgs. 122002. ISSN 0031-9007. [consulta: 8 de maig de 2026]. Disponible a: https://hdl.handle.net/2445/175063

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