Phys. Rev. Lett. 59, 407–410 (1987)Γ(b→ulν)/Γ(b→clν) from the end point of the lepton momentum spectrum in semileptonic B decayReceived 4 May 1987; published in the issue dated 27 July 1987 We have used the measured yield of leptons near the end point of the momentum spectrum from semileptonic B decay to obtain an upper limit on Γ(b→ulν)/Γ(b→clν) and a corresponding limit on ‖Vub‖/‖Vcb‖. © 1987 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.59.407
DOI:
10.1103/PhysRevLett.59.407
PACS:
13.20.Jf, 14.40.Jz, 14.80.Dq
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