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

  • Author(s): Aubert, B
  • Bona, M
  • Karyotakis, Y
  • Lees, JP
  • Poireau, V
  • Prencipe, E
  • Prudent, X
  • Tisserand, V
  • Garra Tico, J
  • Grauges, E
  • Lopez, L
  • Palano, A
  • Pappagallo, M
  • Eigen, G
  • Stugu, B
  • Sun, L
  • Abrams, GS
  • Battaglia, M
  • Brown, DN
  • Cahn, RN
  • Jacobsen, RG
  • Kerth, LT
  • Kolomensky, YG
  • Lynch, G
  • Osipenkov, IL
  • Ronan, MT
  • Tackmann, K
  • Tanabe, T
  • Hawkes, CM
  • Soni, N
  • Watson, AT
  • Koch, H
  • Schroeder, T
  • Walker, D
  • Asgeirsson, DJ
  • Fulsom, BG
  • Hearty, C
  • Mattison, TS
  • McKenna, JA
  • Barrett, M
  • Khan, A
  • Blinov, VE
  • Bukin, AD
  • Buzykaev, AR
  • Druzhinin, VP
  • Golubev, VB
  • Onuchin, AP
  • Serednyakov, SI
  • Skovpen, YI
  • Solodov, EP
  • Todyshev, KY
  • Bondioli, M
  • Curry, S
  • Eschrich, I
  • Kirkby, D
  • Lankford, AJ
  • Lund, P
  • Mandelkern, M
  • Martin, EC
  • Stoker, DP
  • Abachi, S
  • Buchanan, C
  • Gary, JW
  • Liu, F
  • Long, O
  • Shen, BC
  • Vitug, GM
  • Yasin, Z
  • Zhang, L
  • Sharma, V
  • Campagnari, C
  • Hong, TM
  • Kovalskyi, D
  • Mazur, MA
  • Richman, JD
  • Beck, TW
  • Eisner, AM
  • Flacco, CJ
  • Heusch, CA
  • Kroseberg, J
  • Lockman, WS
  • Martinez, AJ
  • Schalk, T
  • Schumm, BA
  • Seiden, A
  • Wilson, MG
  • Winstrom, LO
  • Cheng, CH
  • Doll, DA
  • Echenard, B
  • Fang, F
  • Hitlin, DG
  • Narsky, I
  • Piatenko, T
  • Porter, FC
  • Andreassen, R
  • Mancinelli, G
  • et al.
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. © 2009 The American Physical Society.

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