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00925njm 22002777a 4500 dc Badalov, Alexey author Calvo Gómez, Míriam author Garrido Beltrán, Lluís author Graciani Díaz, Ricardo author Graugés Pous, Eugeni author Marin Benito, Carla author Picatoste Olloqui, Eduardo author Rives Molina, Vicente José author Ruiz, Hugo (Ruiz Pérez) author Vilasis-Cardona, Xavier author LHCb Collaboration author 2019-04-02T12:28:25Z 2019-04-02T12:28:25Z 2014-09-30 2019-04-02T12:28:25Z 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. Física de partícules Gran Col·lisionador d'Hadrons Col·lisions (Física nuclear) Particle physics Large Hadron Collider (France and Switzerland) Collisions (Nuclear physics) Measurement of CP violation in B0s → ϕϕ decays