Precision Measurement of CP Violation in $$D^0\to\pi^+\pi^-$$ at CDF
Conference
·
· PoS HQL2010:048,2010
OSTI ID:993556
We report a preliminary measurement of the CP violating asymmetry in D{sup 0} {yields} {pi}{sup +}{pi}{sup -} using approximately 215,000 decays reconstructed in about 5.94/fb of CDF data. We use the strong D* {+-} D{sup 0}{pi}{sup +} decay (D* tag) to identify the flavor of the charmed meson at production time and exploit CP-conserving strong c-{bar c} pair-production in p-{bar p} collisions. Higher statistic samples of Cabibbo-favored D{sup 0} {yields} K{sup -}{pi}{sup +} 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.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 993556
- Report Number(s):
- FERMILAB-CONF-10-477-E; arXiv eprint number arXiv:1011.4892; TRN: US1008102
- Journal Information:
- PoS HQL2010:048,2010, Conference: Prepared for 10th International Conference on Heavy Quarks and Leptons, Frascati (Rome), Italy, 11-16 Oct 2010
- Country of Publication:
- United States
- Language:
- English
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