Search for CP violation in D0 and D+ decays

Abstract

A high statistics sample of photoproduced charm particles from the FOCUS (E831) experiment at Fermilab has been used to search for CP violation in the Cabibbo suppressed decay modes D+ to K-K+pi+, D0 to K-K+ and D0 to pi-pi+. We have measured the following CP asymmetry parameters: A_CP(K-K+pi+) = +0.006 +/- 0.011 +/- 0.005, A_CP(K-K+) = -0.001 +/- 0.022 +/- 0.015 and A_CP(pi-pi+) = +0.048 +/- 0.039 +/- 0.025 where the first error is statistical and the second error is systematic. These asymmetries are consistent with zero with smaller errors than previous measurements.

12 pages, 4 figures

References in corpus (5)

• Nonleptonic weak decays of charmed mesons
• Branching Fractions for D0 -> K+K- and D0 -> pi+pi-, and a Search for CP Violation in D0 Decays
• Search for CP Violation in Charged D Meson Decays
• Rephase-Invariant CP-Violating Observables and Mixings in the $B^0$, $D^0$, $K^0$ Systems.
• A Strong QCD Enhancement of CP Violation in Charmed Meson Decays?

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