D⁰- D⁰ Mixing and CP Violation from FOCUS Experiment

2000/11/16 by Hwanbae Park, Park, Hwanbae
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #hep-ex

paper · pdf · doi:10.48550/arxiv.hep-ex/0011051

4 pages, 2 figures, contributed to the XXX International Conference on High Energy Physics (ICHEP 2000), Osaka, Japan, 27 July - 2 August, 2000. revision: This revision fixes a few typos. Also added FOCUS collaborators as co-authors

arxiv created 2000/11/27 · arxiv updated 2009/11/30

Abstract

Measurement results on D⁰- D⁰ mixing and CP violation are presented. FOCUS, a fixed target experiment at Fermilab, collected a high statistics photo-produced charm sample collected during the 96-97 run. We reconstructed more than 1 million charmed particles and compared the lifetimes of two D⁰ meson decays to K^-π⁺ and K^-K⁺. The mixing parameter, y_{\rm cp}, we obtained is (3.42± 1.39± 0.74)%. We also searched CP asymmetries in D⁺→ K^-K⁺π⁺, D⁰→ K^-K⁺ and D⁰→ π^-π⁺ decay modes. We did not see any evidence of CP violation by comparing the decay rates for particle and antiparticle.

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