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Measurement of the Cabibbo-Kobayashi-Maskawa matrix element V(ub) with B-->rhoenu decays.

  • Author(s): Aubert, B;
  • Barate, R;
  • Boutigny, D;
  • Gaillard, J-M;
  • Hicheur, A;
  • Karyotakis, Y;
  • Lees, JP;
  • Robbe, P;
  • Tisserand, V;
  • Zghiche, A;
  • Palano, A;
  • Pompili, A;
  • Chen, JC;
  • Qi, ND;
  • Rong, G;
  • Wang, P;
  • Zhu, YS;
  • Eigen, G;
  • Ofte, I;
  • Stugu, B;
  • Abrams, GS;
  • Borgland, AW;
  • Breon, AB;
  • Brown, DN;
  • Button-Shafer, J;
  • Cahn, RN;
  • Charles, E;
  • Gill, MS;
  • Gritsan, AV;
  • Groysman, Y;
  • Jacobsen, RG;
  • Kadel, RW;
  • Kadyk, J;
  • Kerth, LT;
  • Kolomensky, Yu G;
  • Kral, JF;
  • LeClerc, C;
  • Levi, ME;
  • Lynch, G;
  • Mir, LM;
  • Oddone, PJ;
  • Orimoto, TJ;
  • Pripstein, M;
  • Roe, NA;
  • Romosan, A;
  • Ronan, MT;
  • Shelkov, VG;
  • Telnov, AV;
  • Wenzel, WA;
  • Harrison, TJ;
  • Hawkes, CM;
  • Knowles, DJ;
  • O'Neale, SW;
  • Penny, RC;
  • Watson, AT;
  • Watson, NK;
  • Deppermann, T;
  • Goetzen, K;
  • Koch, H;
  • Lewandowski, B;
  • Pelizaeus, M;
  • Peters, K;
  • Schmuecker, H;
  • Steinke, M;
  • Barlow, NR;
  • Bhimji, W;
  • Boyd, JT;
  • Chevalier, N;
  • Clark, PJ;
  • Cottingham, WN;
  • Mackay, C;
  • Wilson, FF;
  • Hearty, C;
  • Mattison, TS;
  • McKenna, JA;
  • Thiessen, D;
  • Jolly, S;
  • Kyberd, P;
  • McKemey, AK;
  • Blinov, VE;
  • Bukin, AD;
  • Buzykaev, AR;
  • Golubev, VB;
  • Ivanchenko, VN;
  • Korol, AA;
  • Kravchenko, EA;
  • Onuchin, AP;
  • Serednyakov, SI;
  • Skovpen, Yu I;
  • Yushkov, AN;
  • Best, D;
  • Chao, M;
  • Kirkby, D;
  • Lankford, AJ;
  • Mandelkern, M;
  • McMahon, S;
  • Mommsen, RK;
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  • Hill, EJ;
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  • Paar, HP;
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  • Pulliam, T;
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  • Schmitz, RE;
  • Schumm, BA;
  • Seiden, A;
  • Turri, M;
  • Walkowiak, W;
  • Williams, DC;
  • Wilson, MG;
  • Albert, J;
  • Chen, E;
  • Dubois-Felsmann, GP;
  • Dvoretskii, A;
  • Hitlin, DG;
  • Narsky, I;
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  • Samuel, A;
  • Yang, S;
  • Jayatilleke, S;
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  • Meadows, BT;
  • Sokoloff, MD;
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  • Roy, J;
  • Smith, JG;
  • van Hoek, WC;
  • Zhang, L;
  • Harton, JL;
  • Hu, T;
  • Soffer, A;
  • Toki, WH;
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  • Bozzi, C;
  • Piemontese, L;
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  • Anulli, F;
  • Baldini-Ferroli, R;
  • Calcaterra, A;
  • de Sangro, R;
  • Falciai, D;
  • Finocchiaro, G;
  • Patteri, P;
  • Peruzzi, IM;
  • Piccolo, M;
  • Zallo, A;
  • Bagnasco, S;
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  • Contri, R;
  • Crosetti, G;
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  • Meyer, WT;
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  • Bionta, RM;
  • Brigljević, V;
  • Lange, DJ;
  • van Bibber, K;
  • Wright, DM;
  • Bevan, AJ;
  • Fry, JR;
  • Gabathuler, E;
  • Gamet, R;
  • George, M;
  • Kay, M;
  • Payne, DJ;
  • Sloane, RJ;
  • Touramanis, C;
  • Aspinwall, ML;
  • Bowerman, DA;
  • Dauncey, PD;
  • Egede, U;
  • Eschrich, I;
  • Morton, GW;
  • Nash, JA;
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  • Taylor, GP;
  • Back, JJ;
  • Bellodi, G;
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  • Harrison, PF;
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  • Strother, P;
  • Vidal, PB;
  • Cowan, G;
  • Flaecher, HU;
  • George, S;
  • Green, MG;
  • Kurup, A;
  • Marker, CE;
  • McMahon, TR;
  • Ricciardi, S;
  • Salvatore, F;
  • Vaitsas, G;
  • Winter, MA;
  • Brown, D;
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  • Allison, J;
  • Barlow, RJ;
  • Forti, AC;
  • Hart, PA;
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  • Lillard, V;
  • Roberts, DA;
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  • Hertzbach, SS;
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  • Koptchev, VB;
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  • Staengle, H;
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  • Taylor, F;
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  • Milek, M;
  • Patel, PM;
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  • et al.
Abstract

We present a measurement of the branching fraction for the rare decays B-->rhoenu and extract a value for the magnitude of V(ub), one of the smallest elements of the Cabibbo-Kobayashi-Maskawa quark-mixing matrix. The results are given for five different calculations of form factors used to para-metrize the hadronic current in semileptonic decays. Using a sample of 55 x 10(6) BB meson pairs recorded with the BABAR detector at the PEP-II e(+)e(-) storage ring, we obtain B(B0-->rho(-)e(+)nu)=(3.29+/-0.42+/-0.47+/-0.55) x 10(-4) and |V(ub)|=(3.64+/-0.22+/-0.25(+0.39)(-0.56)) x 10(-3), where the uncertainties are statistical, systematic, and theoretical, respectively.

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