# Measurement of the Branching Fractions of the Radiative Charm Decays $D^{0} \to {\bar K}^{*0} \gamma$ and $D^{0} \to \phi \gamma$

Abstract : We present a measurement of the branching fractions for the Cabibbo-favored radiative decay, $D^{0} \to {\bar K}^{*0} \gamma$, and the Cabibbo-suppressed radiative decay, $D^{0} \to \phi \gamma$. These measurements are based on a data sample corresponding to an integrated luminosity of $387.1 fb^{-1}$, recorded with the BaBar detector at the PEP-II $e^+e^-$ asymmetric-energy collider operating at center-of-mass energies 10.58 and 10.54 GeV. We measure the branching fractions relative to the well-studied decay $D^{0} \to K^{-} \pi^{+}$ and find ${\cal B}(D^{0} \to {\bar K}^{*0} \gamma)/{\cal B}(D^{0} \to K^{-} \pi^{+}) = (8.43 \pm 0.51 \pm 0.70) \times 10^{-3}$ and ${\cal B}(D^{0} \to \phi \gamma)/{\cal B}(D^{0} \to K^{-} \pi^{+}) = (7.15 \pm 0.78 \pm 0.69) \times 10^{-4}$, where the first error is statistical and the second is systematic. This is the first measurement of ${\cal B}(D^{0} \to {\bar K}^{*0} \gamma)$.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00335768
Contributor : Claudine Bombar <>
Submitted on : Thursday, October 30, 2008 - 2:44:01 PM
Last modification on : Saturday, November 28, 2020 - 12:58:03 PM

### Citation

B. Aubert, M. Bona, Y. Karyotakis, J.P. Lees, V. Poireau, et al.. Measurement of the Branching Fractions of the Radiative Charm Decays $D^{0} \to {\bar K}^{*0} \gamma$ and $D^{0} \to \phi \gamma$. Physical Review D, American Physical Society, 2008, 78, pp.071101. ⟨10.1103/PhysRevD.78.071101⟩. ⟨in2p3-00335768⟩

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