2026-04-17T02:05:00Zhttps://recercat.cat/oai/requestoai:recercat.cat:20.500.14342/30762025-03-11T04:09:48Zcom_2072_482405com_2072_183628col_2072_482415
RECERCAT
author
Calvo Gómez, Míriam
author
Camboni, Alessandro
author
Vilasís Cardona, Xavier
author
LHCb Collaboration - CERN
2025-03-11T04:09:48Z
2025-03-11T04:09:48Z
2020-03
http://hdl.handle.net/20.500.14342/3076
https://doi.org/10.1103/PhysRevLett.124.122002
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.
eng
Attribution 4.0 International © CERN
Gran col·lisionador d'hadrons (França i Suïssa)
Partícules (Física nuclear)
Col·lisions (Física nuclear)
Measurement of fs/fu Variation with Proton-Proton Collision Energy and B-Meson Kinematics
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion