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A Study of radiative bottomonium transitions using converted photons Garra Ticó, Jordi Graugés Pous, Eugeni BABAR Collaboration Física de partícules Experiments Particle physics Experiments We use ( 111 ± 1 ) million Υ ( 3 S ) and ( 89 ± 1 ) million Υ ( 2 S ) events recorded by the BABAR detector at the PEP-II B-factory at SLAC to perform a study of radiative transitions between bottomonium states using photons that have been converted to e + e − pairs by the detector material. We observe Υ ( 3 S ) → γ χ b 0 , 2 ( 1 P ) decay, make precise measurements of the branching fractions for χ b 1 , 2 ( 1 P , 2 P ) → γ Υ ( 1 S ) and χ b 1 , 2 ( 2 P ) → γ Υ ( 2 S ) decays, and search for radiative decay to the η b ( 1 S ) and η b ( 2 S ) states. 2019-04-08T10:44:56Z 2019-04-08T10:44:56Z 2011-10-10 2019-04-08T10:44:56Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.84.072002 Physical Review D, 2011, vol. 84, num. 7, p. 072002 https://doi.org/10.1103/PhysRevD.84.072002 (c) American Physical Society, 2011 info:eu-repo/semantics/openAccess American Physical Society Articles publicats en revistes (Física Quàntica i Astrofísica)