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Study of exclusive charmless semileptonic B decays and |Vub| |
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| Authors: | Adam N E Alexander J P Berkelman K Cassel D G Duboscq J E Ehrlich R Fields L Gibbons L Gray R Gray S W Hartill D L Heltsley B K Hertz D Jones C D Kandaswamy J Kreinick D L Kuznetsov V E Mahlke-Krüger H Meyer T O Onyisi P U E Patterson J R Peterson D Pivarski J Riley D Ryd A Sadoff A J Schwarthoff H Shi X Stroiney S Sun W M Wilksen T Weinberger M Athar S B Patel R Potlia V Yelton J Rubin P Cawlfield C Eisenstein B I Karliner I Kim D Lowrey N Naik P Selen M White E J Wiss J Mitchell R E Shepherd M R Besson D Pedlar T K Cronin-Hennessy D Gao K Y Hietala J Kubota Y Klein T Lang B W Poling R |
| Affiliation: | Cornell University, Ithaca, New York 14853, USA. |
| Abstract: | 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(B0-->pi-l+nu)=(1.37+/-0.15stat+/-0.11sys)x10(-4) and B(B0-->rho-l+nu)=(2.93+/-0.37stat+/-0.37sys)x10(-4) and find evidence for B+-->eta'l+nu, with B(B+-->eta'l+nu)=(2.66+/-0.80stat+/-0.56sys)x10(-4). From our B-->pilnu rate for q2>16 GeV2 and lattice QCD, we find |Vub|=(3.6+/0.4stat+/0.2syst-0.4thy+0.6)x10(-3) [corrected] |
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