We present a study of the charmless semileptonic B-meson decays B+→ωl+ν and 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 and the η mesons in the channels η→π+π-π0 and η→γγ. We measure the branching fractions B(B+→ωl+ν)=(1.14±0.16stat±0. 08syst)×10-4 and B(B+→ηl+ν)=(0.31±0.06stat±0. 08syst)×10-4.

Aubert, B., Bona, M., Karyotakis, Y., Lees, J., Poireau, V., Prencipe, E., et al. (2009). Measurement of the B+→ωl+ν and B+→ηl+ν branching fractions. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 79(5) [10.1103/PhysRevD.79.052011].

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

CARPINELLI, Massimo;
2009

Abstract

We present a study of the charmless semileptonic B-meson decays B+→ωl+ν and 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 and the η mesons in the channels η→π+π-π0 and η→γγ. We measure the branching fractions B(B+→ωl+ν)=(1.14±0.16stat±0. 08syst)×10-4 and B(B+→ηl+ν)=(0.31±0.06stat±0. 08syst)×10-4.
Articolo in rivista - Articolo scientifico
Scientifica
BABAR detector
English
B. Aubert et al. (The BABAR Collaboration)
Aubert, B., Bona, M., Karyotakis, Y., Lees, J., Poireau, V., Prencipe, E., et al. (2009). Measurement of the B+→ωl+ν and B+→ηl+ν branching fractions. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 79(5) [10.1103/PhysRevD.79.052011].
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Wu, S
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