Kavli Affiliate: D. B. Macfarlane
| First 5 Authors: BaBar Collaboration, J. P. Lees, V. Poireau, V. Tisserand, E. Grauges
| Summary:
We present a search for seven lepton-flavor-violating neutral charm decays of
the type $D^{0}rightarrow X^{0} e^{pm} mu^{mp}$, where $X^{0}$ represents a
$pi^{0}$, $K^{0}_{rm S}$, $bar{K^{*0}}$, $rho^{0}$, $phi$, $omega$, or
$eta$ meson. The analysis is based on $468$ fb$^{-1}$ of $e^+e^-$ annihilation
data collected at or close to the $Upsilon(4S)$ resonance with the BaBar
detector at the SLAC National Accelerator Laboratory. No significant signals
are observed, and we establish 90% confidence level upper limits on the
branching fractions in the range $(5.0 – 22.5)times 10^{-7}$. The limits are
between one and two orders of magnitude more stringent than previous
measurements.
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