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Measurement of time dependent CP asymmetry parameters in B0 meson decays to ωK0S, η′K0, and π0K0S
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We present measurements of the time-dependent C P -violation parameters S and C in the decays B 0 → ω K 0 S , B 0 → η ′ K 0 , reconstructed as η ′ K 0 S and η ′ K 0 L , and B 0 → π 0 K 0 S . The data sample corresponds to the full BABAR dataset of 467 × 10 6 B ¯¯¯ B pairs produced at the PEP-II asymmetric-energy e + e − collider at the Stanford Linear Accelerator Center. The results are S ω K 0 S = 0.55 + 0.26 − 0.29 ± 0.02 , C ω K 0 S = − 0.52 + 0.22 − 0.20 ± 0.03 , S η ′ K 0 = 0.57 ± 0.08 ± 0.02 , C η ′ K 0 = − 0.08 ± 0.06 ± 0.02 , S π 0 K 0 S = 0.55 ± 0.20 ± 0.03 , and C π 0 K 0 S = 0.13 ± 0.13 ± 0.03 , where the first errors are statistical and the second systematic. These results are consistent with our previous measurements and the world average of sin 2 β measured in B 0 → J / ψ K 0 S .
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GARRA TICÓ, Jordi, GRAUGÉS POUS, Eugeni and BABAR Collaboration. Measurement of time dependent CP asymmetry parameters in B0 meson decays to ωK0S, η′K0, and π0K0S. Physical Review D. 2009. Vol. 79, num. 5, pags. 052003. ISSN 1550-7998. [consulted: 28 of August of 2026]. Available at: https://hdl.handle.net/2445/131667