# Search for B --> K* nu anti-nu decays

Abstract : We present a search for the decays $B \to K^{*} \nu \bar{\nu}$ using 454$\times10^{6}$ $B \bar{B}$ pairs collected at the $\Upsilon(4S)$ resonance with the $mbox{\slshape B\kern-0.1em{\smaller A}\kern-0.1em B\kern-0.1em{\smaller A\kern-0.2em R}}$ detector at the SLAC PEP-II $B$-Factory. We first select an event sample where one $B$ is reconstructed in a semileptonic or hadronic mode with one charmed meson. The remaining particles in the event are then examined to search for a $B \to K^{*} \nu \bar{\nu}$ decay. The charged $K^{*}$ is reconstructed as $K^{*+} \to K^0_{\scriptscriptstyle S} \pi^{+}$ or $K^{*+} \to K^{+} \pi^{0}$; the neutral $K^{*}$ is identified in the $K^{*0} \to K^{+} \pi^{-}$ mode. We establish upper limits at 90% confidence level of $\matchal{B}(B^{+} \to K^{*+} \nu \bar{\nu}) < 8 \times 10^{-5}$, $\matchal{B}(B^{0} \to K^{*0} \nu \bar{\nu}) < 12 \times 10^{-5}$, and $\matchal{B}(B \to K^{*} \nu \bar{\nu}) < 8 \times 10^{-5}$.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00315886
Contributor : Claudine Bombar <>
Submitted on : Monday, September 1, 2008 - 3:19:33 PM
Last modification on : Wednesday, September 16, 2020 - 4:14:40 PM

### Citation

B. Aubert, M. Bona, Y. Karyotakis, J.P. Lees, V. Poireau, et al.. Search for B --> K* nu anti-nu decays. Physical Review D, American Physical Society, 2008, 78, pp.072007. ⟨10.1103/PhysRevD.78.072007⟩. ⟨in2p3-00315886⟩

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