Speaker
Prof.
Michael Sokoloff
(University of Cincinnati)
Description
We present evidence of $D^0$-$\bar{D^0}$ mixing using a time-dependent amplitude analysis of the decay
$D^0\rightarrow K^+ \pi^- \pi^0$ in a data sample of 384 fb$^{-1}$ collected with the $B\!a\!B\!a\!r$ detector at the PEP-II
$e^+e^-$ collider at SLAC. Assuming $C\!P$ conservation, we measure the mixing parameters $x'_{K\pi\pi^0} = $[$2.61
\mbox{}^{\rm +0.57}_{\rm -0.68}$\,(stat.)$\pm 0.39$\,(syst.)]\%, $y'_{K\pi\pi^0} = $ [$-0.06 \mbox{}^{\rm +0.55}_{\rm
-0.64}$\,(stat.) $\pm 0.34$\,(syst.)]\%. The confidence level for the data to be consistent with the no-mixing hypothesis is
$0.1\%$, including systematic uncertainties. This result is inconsistent with the no-mixing hypothesis with a significance of
$3.2$ standard deviations. We find no evidence of $C\!P$ violation in mixing.
Authors
Prof.
Michael Sokoloff
(University of Cincinnati)
Owen Long
(Babar Collaboration)
