Search for CP violation using $T$-odd correlations in $D^0 \to K^+ K^- π^+ π^-$ decays

Details Search for CP violation using $T$-odd correlations in $D^0 \to K^+ K^- π^+ π^-$ decays Search for CP violation using $T$-odd correlations in $D^0 \to K^+ K^- π^+ π^-$ decays

2010-03-17

arxiv.org/abs/1003.3397v2

Phys.Rev.D(RC) 81 111103 (2010)

Physics

High Energy Physics

High Energy Physics - Experiment

7 pages, 2 postscript figures, submitted to Phys. Rev. Lett

Scientific paper

We search for CP violation in a sample of $4.7\times10^4$ Cabibbo-suppressed $D^0 \to K^+ K^- \pi^+ \pi^-$ decays. We use 470{\rm fb}^{-1} of data recorded by the BaBar detector at the PEPII asymmetric-energy $e^+e^-$ storage rings running at center-of-mass energies near 10.6 GeV. CP violation is searched for in the difference between the $T$-odd asymmetries, obtained using triple product correlations, measured for $D^0$ and $\bar D^0$ decays. The measured CP violation parameter is ${\cal A}_T = (1.0 \pm 5.1_{\sta}\pm 4.4_{\sys}) \times 10^{-3}$.

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