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  • Experimental limits on weak...
    Rosner, J L; Adam, N E; 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; Phillips, E A; Riley, D; Shi, X; Stroiney, S; Sun, W M; Wilksen, T; Weinberger, M; Athar, S B; Avery, P; Breva-Newell, L; Potlia, V; Stoeck, H; Yelton, J; Rubin, P; Cawlfield, C; Eisenstein, B I; Karliner, I; Lowrey, N; Naik, P; Sedlack, C; Selen, M; Thaler, J J; White, E J; Wiss, J; Asner, D M; Edwards, K W; Besson, D; Pedlar, T K; Cronin-Hennessy, D; Gao, K Y; Gong, D T; Hietala, J; Klein, T; Poling, R; Scott, A W; Smith, A; Dobbs, S; Metreveli, Z; Seth, K K; Zweber, P; Ernst, J; Arms, K; Severini, H; Love, W; Mehrabyan, S; Savinov, V; Lopez, A; Mendez, H; Huang, G S; Miller, D H; Pavlunin, V; Sanghi, B; Anderson, M; Cummings, J P; Danko, I; Park, C S; Thorndike, E H; Coan, T E; Gao, Y S; Stroynowski, R; Artuso, M; Boulahouache, C; Blusk, S; Butt, J; Menaa, N; Nisar, S; Randrianarivony, K; Stone, S; Wang, J C; Zhang, K; Csorna, S E; Cinabro, D; Dubrovin, M; Lincoln, A; Briere, R A; Chen, J; Ferguson, T; Vogel, H

    Physical review letters, 2006-Mar-31, 20060331, Letnik: 96, Številka: 12
    Journal Article

    We present the first experimental limits on high-q2 contributions to charmless semileptonic decays of the form expected from the weak annihilation (WA) decay mechanism. Such contributions could bias determinations of /Vub/ from inclusive measurements of B-->Xulupsilon. Using a wide range of models based on available theoretical input we set a limit of GammaWA/Gammab-->u<7.4% (90% confidence level) on the WA fraction, and assess the impact on previous inclusive determinations of /Vub/.