Measurement off f(s)/f(u) Variation with Proton-Proton Collision Energy and B-Meson Kinematics
| Autor: | Alfonso Albero, Alejandro, Calvo Gómez, Míriam, Camboni, Alessandro, Coquereau, Samuel, Garrido Beltrán, Lluís, Gascón Fora, David, Gironella Gironell, Pere, Graciani Díaz, Ricardo, Graugés Pous, Eugeni, Vilasis-Cardona, Xavier, García Martín, L. M., Henry, L., Martínez Vidal, F., Oyanguren Campos, Arantza de, Remon Alepuz, C., Ruiz Vidal, J., Sánchez Mayordomo, C., LHCb Collaboration |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Dipòsit Digital de la UB Universidad de Barcelona |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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