Measurement of CP–Violating Asymmetries in $$D^0 \to \pi^+ \pi^-$$ and $$D^0 \to K^+ K^- $$ Decays at CDF
- Univ. of Pisa (Italy)
We report a search for non–Standard Model physics through the measurement of CP–violating asymmetries in the singly–Cabibbo– suppressed $$D^0 \to \pi^+ \pi^-$$ and $$D^0 \to K^+ K^- $$ decays reconstructed in about 5.9 fb-1 of CDF data. We use the strong $$D^{*+} \to D^0\pi^+$$ decay (“D tag”) to identify the flavor of the charmed meson at production time and exploit CP–conserving strong cc pair–production in pp collisions. Large samples of Cabibbo–favored $$D^0 \to K^-\pi^+$$ decays with and without D tag are used to highly suppress systematic uncertainties due to detector effects. The results are the world’s most precise measurements to date and have been published by Physical Review D in January 2012 [1].
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1248346
- Report Number(s):
- FERMILAB-THESIS-2011-29; 944861
- Country of Publication:
- United States
- Language:
- English
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