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Title: Measurement of CP violation in B0s → ϕϕ decays
Author: Badalov, Alexey
Calvo Gómez, Míriam
Garrido Beltrán, Lluís
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
Gran Col·lisionador d'Hadrons
Col·lisions (Física nuclear)
Particle physics
Large Hadron Collider (France and Switzerland)
Collisions (Nuclear physics)
Issue Date: 30-Sep-2014
Publisher: American Physical Society
Abstract: A measurement of the decay time-dependent C P -violating asymmetry in B 0 s → ϕ ϕ decays is presented, along with measurements of the T -odd triple-product asymmetries. In this decay channel, the C P -violating weak phase arises from the interference between B 0 s − ¯ B 0 s mixing and the loop-induced decay amplitude. Using a sample of proton-proton collision data corresponding to an integrated luminosity of 3.0     fb − 1 collected with the LHCb detector, a signal yield of approximately 4000 B 0 s → ϕ ϕ decays is obtained. The C P -violating phase is measured to be ϕ s = − 0.17 ± 0.15 ( stat ) ± 0.03 ( syst )     rad . The triple-product asymmetries are measured to be A U = − 0.003 ± 0.017 ( stat ) ± 0.006 ( syst ) and A V = − 0.017 ± 0.017 ( stat ) ± 0.006 ( syst ) . Results are consistent with the hypothesis of C P conservation.
Note: Reproducció del document publicat a:
It is part of: Physical Review D, 2014, vol. 90, num. 5, p. 052011
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ISSN: 1550-7998
Appears in Collections:Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))
Articles publicats en revistes (Física Quàntica i Astrofísica)

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