Time-dependent CP violation in B0→ K0 s φ, $K^0_s\eta'$ and K0 s K+ K– in the Belle and BaBar experiments

Abstract

Both the Belle and BaBar collaborations have recently measured time-dependent CP violation in B0 decays to $ss\overline{s}$ states and compared the results to those for $sc\overline{c}$ states for which quite precise results were previously available. Within the framework of the standard model the same results should be expected for both cases. The decays to $ss\overline{s}$ states are dominated by penguin diagrams and may be sensitive to physics beyond the standard model. For these states, compared to the results for $sc\overline{c}$ states, a discrepancy in the mixing-induced CP violation of 2.7 standard deviations was found, and may be interpreted as an indication for physics beyond the standard model. PACS: 11.30.Er Charge conjugation, parity, time reversal, andother discrete symmetries – 12.15.Hh Determination of Kobayashi-Maskawa matrix elements – 13.25.Hw Decays of bottom mesons