# Branching Fraction for $B^+ \to \pi^0 \ell^+ \nu$, Measured in $\Upsilon(4S) \to B \overline{B}$ Events Tagged by $B^- \to D^0 \ell^- \overline{\nu}$ (X) Decays

Abstract : We report a preliminary branching fraction of (1.80 +/- 0.37(stat.) +/- 0.23(syst.)) x 10^-4 for the charmless exclusive semileptonic B+ -> pi0 l+ nu decay, where l can be either a muon or an electron. This result is based on data corresponding to an integrated luminosity of 81 fb^-1 collected at the Upsilon(4S) resonance with the BABAR detector. The analysis uses BBbar events that are tagged by a B meson reconstructed in the semileptonic B- -> D0 l- nubar (X) decays, where X can be either a gamma or a pi0 from a D* decay.
Document type :
Conference papers

http://hal.in2p3.fr/in2p3-00024979
Contributor : Dominique Girod <>
Submitted on : Monday, October 31, 2005 - 3:01:58 PM
Last modification on : Sunday, June 20, 2021 - 3:34:56 AM

### Citation

B. Aubert, R. Barate, D. Boutigny, F. Couderc, Y. Karyotakis, et al.. Branching Fraction for $B^+ \to \pi^0 \ell^+ \nu$, Measured in $\Upsilon(4S) \to B \overline{B}$ Events Tagged by $B^- \to D^0 \ell^- \overline{\nu}$ (X) Decays. XXIInd International Symposium on Lepton and Photon Interactions at High Energies, Jun 2005, Uppsala, Sweden. pp.1-17. ⟨in2p3-00024979⟩

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