# Observation of CP violation in $B^0 \to \eta' K^0$ Decays

Abstract : We present measurements of the time-dependent CP-violation parameters S and C in B^0 --> eta' K^0 decays. The data sample corresponds to 384 million B Bar pairs produced by e^+ e^- annihilation at the Y(4S). The results are S = 0.58 +- 0.10 +- 0.03 and C = -0.16 +- 0.07 +- 0.03. We observe mixing-induced CP violation with a significance of 5.5 standard deviations in this b -> s penguin dominated mode.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00115171
Contributor : Dominique Girod <>
Submitted on : Monday, November 20, 2006 - 3:04:07 PM
Last modification on : Wednesday, September 16, 2020 - 4:17:13 PM

### Citation

B. Aubert, M. Bona, D. Boutigny, F. Couderc, Y. Karyotakis, et al.. Observation of CP violation in $B^0 \to \eta' K^0$ Decays. Physical Review Letters, American Physical Society, 2007, 98, pp.031801. ⟨10.1103/PhysRevLett.98.031801⟩. ⟨in2p3-00115171⟩

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