Camboni, AlessandroComerma-Montells, A.Garrido Beltrán, LluísGraciani Díaz, RicardoGraugés Pous, EugeniPicatoste Olloqui, EduardoPotterat, CédricRives Molina, Vicente JoséRuiz, Hugo (Ruiz Pérez)LHCb Collaboration2022-05-172022-05-172014-041126-6708https://hdl.handle.net/2445/185686Measurements of b-hadron lifetimes are reported using pp collision data, corresponding to an integrated luminosity of 1.0 fb−1 , collected by the LHCb detector at a centre-of-mass energy of 7 TeV. Using the exclusive decays B+ → J/ψ K+, B0 → J/ψ K∗ (892)0 , B0 → J/ψ K0 S , Λ 0 b → J/ψ Λ and B0 s → J/ψ φ the average decay times in these modes are measured to be τB+→J/ψ K+ = 1.637 ± 0.004 ± 0.003 ps, τB0→J/ψ K∗0 = 1.524 ± 0.006 ± 0.004 ps, τB0→J/ψ K0 S = 1.499 ± 0.013 ± 0.005 ps, τΛ0 b→J/ψ Λ = 1.415 ± 0.027 ± 0.006 ps, τB0 s→J/ψ φ = 1.480 ± 0.011 ± 0.005 ps, where the first uncertainty is statistical and the second is systematic. These represent the most precise lifetime measurements in these decay modes. In addition, ratios of these lifetimes, and the ratio of the decay-width difference, ∆Γd, to the average width, Γd, in the B0 system, ∆Γd/Γd = −0.044 ± 0.025 ± 0.011, are reported. All quantities are found to be consistent with Standard Model expectations.29 p.application/pdfengcc-by (c) Camboni, Alessandro et al., 2014https://creativecommons.org/licenses/by/4.0/HadronsGran Col·lisionador d'HadronsFísica de partículesExperimentsHadronsLarge Hadron Collider (France and Switzerland)Particle physicsExperimentsinfo:eu-repo/semantics/article6457732022-05-17info:eu-repo/semantics/openAccess