Precision Measurement of CP Violation in D0->pi+pi- at CDF

Details Precision Measurement of CP Violation in D0->pi+pi- at CDF Precision Measurement of CP Violation in D0->pi+pi- at CDF

2010-11-22

arxiv.org/abs/1011.4892v3

PoS HQL2010:048,2010

Physics

High Energy Physics

High Energy Physics - Experiment

6 pages, 9 figures, 1 table. Proceedings for HQL 2010

Scientific paper

We report a preliminary measurement of the CP violating asymmetry in D0->pi+pi- using approximately 215,000 decays reconstructed in about 5.94/fb of CDF data. We use the strong D*+->D0pi+ decay ("D* tag") to identify the flavor of the charmed meson at production time and exploit CP-conserving strong c-cbar pair-production in p-pbar collisions. Higher statistic samples of Cabibbo-favored D0->K-pi+ decays with and without D* tag are used to highly suppress systematic uncertainties due to detector effects. The result is the world's most precise measurement to date.

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