Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2005-08-19
Phys.Rev.D72:091101,2005
Physics
High Energy Physics
High Energy Physics - Experiment
7 pages, 4 postscript figues, submitted to PRD Rapid Communications
Scientific paper
10.1103/PhysRevD.72.091101
Data samples corresponding to the isospin-violating decay $D_s^{*+}\to D_s^+ \pi^0$ and the decays $D_s^{*+}\to D_s^+\gamma$, $D^{*0}\to D^0\pi^0$ and $D^{*0}\to D^0\gamma$ are reconstructed using 90.4 ${\rm fb}^{-1}$ of data recorded by the BaBar detector at the PEP-II asymmetric-energy $e^+e^-$ collider. The following branching ratios are extracted: $\Gamma(D_s^{*+}\to D_s^+ \pi^0)/\Gamma(D_s^{*+}\to D_s^+\gamma) = 0.062\pm0.005 ({\rm stat.})\pm0.006 ({\rm syst.})$ and $\Gamma(D^{*0}\to D^0\pi^0)/\Gamma(D^{*0}\to D^0\gamma) = 1.74\pm0.02 ({\rm stat.})\pm0.13 ({\rm syst.})$. Both measurements represent significant improvements over present world averages.
"The BABAR Collaboration
Aubert B.
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