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Branching fraction measurement of B \to omega l nu decays

Abstract : We present a measurement of the $B \to \omega \ell \nu$ branching fraction based on a sample of 467 million BB pairs recorded by the BaBar detector at the SLAC PEP-2 e+e- collider. We observe $1041 \pm 133$ signal decays, corresponding to a branching fraction of $\BR(B \to \omega \ell \nu$) = (1.15 \pm 0.15 \pm 0.12) \times 10^{-4}$, where the first error is statistical and the second is systematic. The dependence of the decay rate on $q^2$, the momentum transfer squared to the lepton system, is compared to QCD predictions of the form factors based on a quark model and light-cone sum rules.
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Submitted on : Wednesday, May 30, 2012 - 11:57:49 AM
Last modification on : Tuesday, January 25, 2022 - 12:48:04 PM

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J. P. Lees, V. Poireau, V. Tisserand, N. Arnaud, M. Davier, et al.. Branching fraction measurement of B \to omega l nu decays. Physical Review D, American Physical Society, 2013, 87, pp.032004. ⟨10.1103/PhysRevD.87.032004⟩. ⟨in2p3-00702451⟩



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