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Title: Measurements of Indirect CP Asymmetries in D0→K−K+ and D0→π−π+ Decays
Author: Badalov, Alexey
Calvo Gómez, Míriam
Camboni, Alessandro
Comerma Montells, Albert
Garrido Beltrán, Lluís
Graciani Díaz, Ricardo
Graugés Pous, Eugeni
Oyanguren Campos, Arantza de
Pérez-Calero Yzquierdo, Antonio
Picatoste Olloqui, Eduardo
Potterat, Cédric
Rives Molina, Vicente José
Ruiz, Hugo (Ruiz Pérez)
Ruiz Valls, Pablo
Vilasis-Cardona, Xavier
LHCb Collaboration
Keywords: Física de partícules
Particle physics
Issue Date: 31-Jan-2014
Publisher: American Physical Society
Abstract: A study of indirect C P violation in D 0 mesons through the determination of the parameter A Γ is presented using a data sample of p p collisions, corresponding to an integrated luminosity of 1.0     fb − 1 , collected with the LHCb detector and recorded at the center-of-mass energy of 7 TeV at the LHC. The parameter A Γ is the asymmetry of the effective lifetimes measured in decays of D 0 and ¯ D 0 mesons to the C P eigenstates K − K + and π − π + . Fits to the data sample yield A Γ ( K K ) = ( − 0.35 ± 0.62 ± 0.12 ) × 10 − 3 and A Γ ( π π ) = ( 0.33 ± 1.06 ± 0.14 ) × 10 − 3 , where the first uncertainties are statistical and the second systematic. The results represent the world's best measurements of these quantities. They show no difference in A Γ between the two final states and no indication of C P violation.
Note: Reproducció del document publicat a:
It is part of: Physical Review Letters, 2014, vol. 112, num. 4, p. 041801
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ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)
Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))

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