2026-04-13T05:00:43Zhttps://recercat.cat/oai/request

oai:recercat.cat:20.500.14342/30762025-03-11T04:09:48Zcom_2072_482405com_2072_183628col_2072_482415

00925njm 22002777a 4500 dc Calvo Gómez, Míriam author Camboni, Alessandro author Vilasís Cardona, Xavier author LHCb Collaboration - CERN author 2020-03 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. http://hdl.handle.net/20.500.14342/3076 https://doi.org/10.1103/PhysRevLett.124.122002 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