Mixing and CP Violation in the Decay of Neutral D Mesons at CLEO . CLEO
نویسندگان
چکیده
We present preliminary results of several analyses searching for the effects of CP violation and mixing in the decay ofD0 mesons. We find no evidence of CP asymmetry in five different two-body decay modes of the D0 to pairs of light pseudo-scalar mesons: ACP (K +K−) = (+0.05±2.18±0.84)%, ACP (π+π−) = (+2.0±3.2±0.8)%, ACP (K0 Sπ) = (+0.1±1.3)%, ACP (π0π0) = (+0.1±4.8)% and ACP (K 0 SK 0 S) = (−23 ± 19)%. We present the first measurement of the rate of wrong-sign D0 → K+π−π0 decay: RWS = 0.0043 −0.0010 ± 0.0007. Finally, we describe a measurement of the mixing parameter yCP = ∆Γ 2Γ by searching for a lifetime difference between the CP neutral K+π− final state and the CP even K+K− and π+π− final states. Under the assumption that CP is conserved we find yCP = −0.011 ± 0.025 ± 0.014.
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