Calvo Gómez, MíriamCamboni, AlessandroEnterria i Adan, David G. d'Garrido Beltrán, LluísGrabalosa Gándara, MarcGraciani Díaz, RicardoGraugés Pous, EugeniLópez Asamar, EliasMusy, MarcoPérez-Calero Yzquierdo, AntonioPie Valls, B. (Blai)Potterat, CédricPuig Navarro, AlbertRuiz, Hugo (Ruiz Pérez)Vázquez Gómez, RicardVilasis-Cardona, XavierLHCb Collaboration2014-10-022014-10-0220111126-6708https://hdl.handle.net/2445/57959The Λ¯/Λ and Λ¯/K0S production ratios are measured by the LHCb detector from 0.3 nb−1 of pp collisions delivered by the LHC at s√=0.9 TeV and 1.8 nb−1 at s√=7 TeV. Both ratios are presented as a function of transverse momentum, p T, and rapidity, y, in the ranges 0.15 < p T < 2.50 GeV/c and 2.0 < y < 4.5. Results at the two energies are in good agreement as a function of rapidity loss, ∆y = y beam − y, and are consistent with previous measurements. The ratio Λ¯/Λ , measuring the transport of baryon number from the collision into the detector, is smaller in data than predicted in simulation, particularly at high rapidity. The ratio Λ¯/K0S , measuring the baryon-to-meson suppression in strange quark hadronisation, is significantly larger than expected.22 p.application/pdfengcc-by, (c) LHCb Collaboration, 2011http://creativecommons.org/licenses/by/3.0/es/HadronsTeoria quàntica de campsTeoria quànticaGravitacióRelativitat (Física)HadronsQuantum field theoryQuantum theoryGravitationRelativity (Physics)info:eu-repo/semantics/article6017422014-10-02info:eu-repo/semantics/openAccess