# Measurement of the $B^0 \rightarrow D^{*-}a_1^+$ Branching Fraction with Partially Reconstructed $D^*$

Abstract : The B^0 -> D^*-a_1^+ branching fraction has been measured with data collected by the BABAR experiment in 1999 and 2000 corresponding to a total integrated luminosity of 20.6 fb^-1. Signal events have been selected using a partial reconstruction technique, in which only the a_1^+ and the slow pion (pi_s) from the D^*- decay are identified. A signal yield of 18400 +/- 1200 events has been found, corresponding to a preliminary branching fraction of (1.20 +/- 0.07(stat) +/- 0.14 (syst))%.
Document type :
Conference papers

http://hal.in2p3.fr/in2p3-00012408
Contributor : Claudine Bombar <>
Submitted on : Monday, January 13, 2003 - 5:21:46 PM
Last modification on : Wednesday, January 6, 2021 - 6:22:02 PM

### Citation

B. Aubert, D. Boutigny, J.M. Gaillard, A. Hicheur, Y. Karyotakis, et al.. Measurement of the $B^0 \rightarrow D^{*-}a_1^+$ Branching Fraction with Partially Reconstructed $D^*$. International Conference on High Energy Physics 31 ICHEP 2002, Jul 2002, Amsterdam, Netherlands. pp.1-16. ⟨in2p3-00012408⟩

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