We present a study of the charmless semileptonic B-meson decays B+→ωl+ν ; B+→ηl+ν. The analysis is based on 3.83×108 BB̄ pairs recorded at the Υ(4S) resonance with the BABAR detector. The ω mesons are reconstructed in the channel ω→π+π-π0 ; the η mesons in the channels η→π+π-π0 ; η→γγ. We measure the branching fractions B(B+→ωl+ν)=(1.14±0.16stat±0. 08syst)×10-4 ; B(B+→ηl+ν)=(0.31±0.06stat±0. 08syst)×10-4. © 2009 The American Physical Society.

Measurement of the B+→ωl+ν ; B+→ηl+ν branching fractions

PALANO, Antimo;PAPPAGALLO, MARCO IGNAZIO;
2009

Abstract

We present a study of the charmless semileptonic B-meson decays B+→ωl+ν ; B+→ηl+ν. The analysis is based on 3.83×108 BB̄ pairs recorded at the Υ(4S) resonance with the BABAR detector. The ω mesons are reconstructed in the channel ω→π+π-π0 ; the η mesons in the channels η→π+π-π0 ; η→γγ. We measure the branching fractions B(B+→ωl+ν)=(1.14±0.16stat±0. 08syst)×10-4 ; B(B+→ηl+ν)=(0.31±0.06stat±0. 08syst)×10-4. © 2009 The American Physical Society.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11586/179877
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