2001/02/05 by D. Cronin-Hennessy, Cronin-Hennessy, D., CLEO Collaboration +1
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.48550/arxiv.hep-ex/0102006
18 pages postscript, also available through http://w4.lns.cornell.edu/public/CONF, Submitted to the Fourth International Conference on B Physics and CP Violation (BCP4), Ise-Shima, JAPAN
arxiv created 2001/02/05 · openalex publication_date 2001/02/05 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We present preliminary results of several analyses searching for the effects of CP violation and mixing in the decay of D0 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(pi+ pi-) = (+2.0 +- 3.2 +- 0.8)%, ACP(K0S pi0) = (+0.1 +- 1.3)%, ACP(pi0 pi0) = (+0.1 +- 4.8)% and ACP(K0S K0S) = (-23 +- 19)%. We present the first measurement of the rate of wrong-sign D0 -> K+ pi- pi0 decay: RWS = 0.0043 + 0.0011 - 0.0010 +- 0.0007. Finally, we describe a measurement of the mixing parameter yCP= Delta Gamma / (2 Gamma) by searching for a lifetime difference between the CP neutral K+ pi- final state and the CP even K+K- and pi+pi- final states. Under the assumption that CP is conserved we find yCP = -0.011 +- 0.025 +- 0.014.