Published in:

Physical Review Letters 99,4 (2007)


We study semileptonic B decay to the exclusive charmless states pi, rho/omega, eta, and eta(') using the 16 fb(-1) CLEO Upsilon(4S) data sample. We find B(B-0 ->pi(-)l(+)nu) = (1.37 +/- 0.15(stat) +/- 0.11(sys)) x 10(-4) and B(B-0 -> rho(-)l(+)nu) = (2.93 +/- 0.37(stat) +/- 0.37(sys)) x 10(-4) and find evidence for B+ -> eta(')l(+)nu, with B(B+ -> eta(')l(+)nu)=(2.66 +/- 0.80(stat) +/- 0.56(sys)) x 10(-4). From our B -> pi l nu rate for q(2) > 16 GeV2 and lattice QCD, we find vertical bar V-ub vertical bar = (3.6 +/- 0.4(stat) +/- 0.2(syst-0.4thy)(+0.6))x10(-3).


Physics, Multidisciplinary

Date of this Version

January 2007



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