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Title: Measurement of the Semileptonic CP Asymmetry in B0-¯B0 Mixing
Author: Badalov, Alexey
Calvo Gómez, Míriam
Garrido Beltrán, Lluís
Gascón Fora, David
Graciani Díaz, Ricardo
Graugés Pous, Eugeni
Marin Benito, Carla
Picatoste Olloqui, Eduardo
Rives Molina, Vicente José
Ruiz, Hugo (Ruiz Pérez)
Vilasis-Cardona, Xavier
LHCb Collaboration
Keywords: Física de partícules
Particle physics
Issue Date: 28-Jan-2015
Publisher: American Physical Society
Abstract: The semileptonic C P asymmetry in B 0 - ¯ B 0 mixing, a d sl , is measured in proton-proton collision data, corresponding to an integrated luminosity of 3.0     fb − 1 , recorded by the LHCb experiment. Semileptonic B 0 decays are reconstructed in the inclusive final states D − μ + and D * − μ + , where the D − meson decays into the K + π − π − final state and the D * − meson into the ¯ D 0 ( → K + π − ) π − final state. The asymmetry between the numbers of D ( * ) − μ + and D ( * ) + μ − decays is measured as a function of the decay time of the B 0 mesons. The C P asymmetry is measured to be a d sl = ( − 0.02 ± 0.19 ± 0.30 ) % , where the first uncertainty is statistical and the second systematic. This is the most precise measurement of a d sl to date and is consistent with the prediction from the standard model.
Note: Reproducció del document publicat a:
It is part of: Physical Review Letters, 2015, vol. 114, num. 4, p. 041601
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ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Electrònica)
Articles publicats en revistes (Física Quàntica i Astrofísica)

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