Acta Physica Polonica B
Proceedings Supplement

Vol. 1, No. 2, February 2008, page 339

D⁰–\overline D⁰ Mixing in D⁰ \to K \pi

Recently, the BaBar collaboration presented evidence for D⁰-\overline D⁰ mixing in D⁰ \rightarrow K⁺\pi ^- decays from 384 fb^-1 of e⁺e^- colliding-beam data recorded near \sqrt s = 10.6 GeV. The reported mixing parameters are  x^{' 2} = \[-0.22 ±0.30(stat.)±0.21 (syst.)\]×10^-3 and y^' = \[9.7 ±4.4 (stat.)±3.1 (syst.)\] ×10^-3 with correlation coefficient -0.94. This excludes the no-mixing hypothesis at the 3.9 \sigma level. Earlier results from the BELLE collaboration excluded the no-mixing hypothesis at the 2 \sigma level and are consistent with BaBar's. Combining these results, the no-mixing hypothesis is excluded at the 4 \sigma level. No evidence for CP violation is observed.

PACS numbers: 13.25.Ft, 12.15.Ff, 11.30.Er