# Evidence for the Rare Decay $B^+ \to D_ s^+ \pi^0$

Abstract : We have searched for the rare decay B+ --> Ds+ pi0. The analysis is based on a sample of 232 million Upsilon(4S) --> B anti-B decays collected with the BABAR detector at the PEP-II e+ e- storage ring. We find 19.6 signal events, corresponding to a significance of 4.7 sigma. The extracted signal yield including statistical and systematic uncertainties is 20.1+6.8+0.4 -6.0-1.5, and we measure B(B+ --> Ds+ pi0) =(1.5 +0.5 -0.4 +- 0.1 +- 0.2) 10^-5, where the first uncertainty is statistical, the second is systematic, and the last is due to the uncertainty on the Ds+ decay and its daughter decay branching fractions.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00119430
Contributor : Dominique Girod <>
Submitted on : Saturday, December 9, 2006 - 4:12:34 PM
Last modification on : Sunday, June 20, 2021 - 3:34:40 AM

### Citation

B. Aubert, M. Bona, D. Boutigny, Y. Karyotakis, J.P. Lees, et al.. Evidence for the Rare Decay $B^+ \to D_ s^+ \pi^0$. Physical Review Letters, American Physical Society, 2007, 98, pp.171801. ⟨10.1103/PhysRevLett.98.171801⟩. ⟨in2p3-00119430⟩

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