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Measurements of partial branching fractions for B-->Xulnu and determination of |Vub|.

  • Author(s): Aubert, B;
  • Bona, M;
  • Boutigny, D;
  • Karyotakis, Y;
  • Lees, JP;
  • Poireau, V;
  • Prudent, X;
  • Tisserand, V;
  • Zghiche, A;
  • Garra Tico, J;
  • Grauges, E;
  • Lopez, L;
  • Palano, A;
  • Pappagallo, M;
  • Eigen, G;
  • Stugu, B;
  • Sun, L;
  • Abrams, GS;
  • Battaglia, M;
  • Brown, DN;
  • Button-Shafer, J;
  • Cahn, RN;
  • Groysman, Y;
  • Jacobsen, RG;
  • Kadyk, JA;
  • Kerth, LT;
  • Kolomensky, Yu G;
  • Kukartsev, G;
  • Lopes Pegna, D;
  • Lynch, G;
  • Mir, LM;
  • Orimoto, TJ;
  • Osipenkov, IL;
  • Ronan, MT;
  • Tackmann, K;
  • Tanabe, T;
  • Wenzel, WA;
  • Del Amo Sanchez, P;
  • Hawkes, CM;
  • Watson, AT;
  • Koch, H;
  • Schroeder, T;
  • Walker, D;
  • Asgeirsson, DJ;
  • Cuhadar-Donszelmann, T;
  • Fulsom, BG;
  • Hearty, C;
  • Mattison, TS;
  • McKenna, JA;
  • Barrett, M;
  • Khan, A;
  • Saleem, M;
  • Teodorescu, L;
  • Blinov, VE;
  • Bukin, AD;
  • Druzhinin, VP;
  • Golubev, VB;
  • Onuchin, AP;
  • Serednyakov, SI;
  • Skovpen, Yu I;
  • Solodov, EP;
  • Todyshev, K Yu;
  • Bondioli, M;
  • Curry, S;
  • Eschrich, I;
  • Kirkby, D;
  • Lankford, AJ;
  • Lund, P;
  • Mandelkern, M;
  • Martin, EC;
  • Stoker, DP;
  • Abachi, S;
  • Buchanan, C;
  • Foulkes, SD;
  • Gary, JW;
  • Liu, F;
  • Long, O;
  • Shen, BC;
  • Vitug, GM;
  • Zhang, L;
  • Paar, HP;
  • Rahatlou, S;
  • Sharma, V;
  • Berryhill, JW;
  • Campagnari, C;
  • Cunha, A;
  • Dahmes, B;
  • Hong, TM;
  • Kovalskyi, D;
  • Richman, JD;
  • Beck, TW;
  • Eisner, AM;
  • Flacco, CJ;
  • Heusch, CA;
  • Kroseberg, J;
  • Lockman, WS;
  • Schalk, T;
  • Schumm, BA;
  • Seiden, A;
  • Wilson, MG;
  • Winstrom, LO;
  • Chen, E;
  • Cheng, CH;
  • Fang, F;
  • Hitlin, DG;
  • Narsky, I;
  • Piatenko, T;
  • Porter, FC;
  • Andreassen, R;
  • Mancinelli, G;
  • Meadows, BT;
  • Mishra, K;
  • Sokoloff, MD;
  • Blanc, F;
  • Bloom, PC;
  • Chen, S;
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  • Olivas, A;
  • Smith, JG;
  • Ulmer, KA;
  • Wagner, SR;
  • Zhang, J;
  • Gabareen, AM;
  • Soffer, A;
  • Toki, WH;
  • Wilson, RJ;
  • Winklmeier, F;
  • Altenburg, DD;
  • Feltresi, E;
  • Hauke, A;
  • Jasper, H;
  • Merkel, J;
  • Petzold, A;
  • Spaan, B;
  • Wacker, K;
  • Klose, V;
  • Kobel, MJ;
  • Lacker, HM;
  • Mader, WF;
  • Nogowski, R;
  • Schubert, J;
  • Schubert, KR;
  • Schwierz, R;
  • Sundermann, JE;
  • Volk, A;
  • Bernard, D;
  • Bonneaud, GR;
  • Latour, E;
  • Lombardo, V;
  • Thiebaux, Ch;
  • Verderi, M;
  • Clark, PJ;
  • Gradl, W;
  • Muheim, F;
  • Playfer, S;
  • Robertson, AI;
  • Watson, JE;
  • Xie, Y;
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  • de Sangro, R;
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  • Pacetti, S;
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  • Piccolo, M;
  • Rama, M;
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  • Monge, MR;
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  • Morii, M;
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  • Uwer, U;
  • Bard, DJ;
  • Dauncey, PD;
  • Flack, RL;
  • Nash, JA;
  • Vazquez, W Panduro;
  • Tibbetts, M;
  • Behera, PK;
  • Chai, X;
  • Charles, MJ;
  • Mallik, U;
  • Cochran, J;
  • Crawley, HB;
  • Dong, L;
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  • Le Diberder, F;
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  • Roudeau, P;
  • Schune, MH;
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  • Stocchi, A;
  • Wang, WF;
  • Wormser, G;
  • Lange, DJ;
  • Wright, DM;
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  • Burke, JP;
  • Chavez, CA;
  • Fry, JR;
  • Gabathuler, E;
  • Gamet, R;
  • Hutchcroft, DE;
  • Payne, DJ;
  • Schofield, KC;
  • Touramanis, C;
  • Bevan, AJ;
  • Clarke, C;
  • George, KA;
  • Di Lodovico, F;
  • Menges, W;
  • Sacco, R;
  • Cowan, G;
  • Flaecher, HU;
  • Hopkins, DA;
  • Paramesvaran, S;
  • Salvatore, F;
  • Wren, AC;
  • Brown, DN;
  • Davis, CL;
  • Allison, J;
  • Bailey, D;
  • Barlow, NR;
  • Barlow, RJ;
  • Chia, YM;
  • Edgar, CL;
  • Lafferty, GD;
  • West, TJ;
  • Yi, JI;
  • Anderson, J;
  • Chen, C;
  • Jawahery, A;
  • Roberts, DA;
  • Simi, G;
  • Tuggle, JM;
  • Blaylock, G;
  • Dallapiccola, C;
  • Hertzbach, SS;
  • Li, X;
  • Moore, TB;
  • Salvati, E;
  • Saremi, S;
  • Cowan, R;
  • Dujmic, D;
  • Fisher, PH;
  • Koeneke, K;
  • Sciolla, G;
  • Spitznagel, M;
  • Taylor, F;
  • Yamamoto, RK;
  • Zhao, M;
  • Zheng, Y;
  • McLachlin, SE;
  • Patel, PM;
  • Robertson, SH;
  • Lazzaro, A;
  • Palombo, F;
  • Bauer, JM;
  • Cremaldi, L;
  • Eschenburg, V;
  • Godang, R;
  • Kroeger, R;
  • Sanders, DA;
  • Summers, DJ;
  • Zhao, HW;
  • Brunet, S;
  • Côté, D;
  • Simard, M;
  • Taras, P;
  • Viaud, FB;
  • Nicholson, H;
  • De Nardo, G;
  • Fabozzi, F;
  • Lista, L;
  • Monorchio, D;
  • Sciacca, C;
  • Baak, MA;
  • Raven, G;
  • Snoek, HL;
  • Jessop, CP;
  • Knoepfel, KJ;
  • Losecco, JM;
  • Benelli, G;
  • Corwin, LA;
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  • Kagan, H;
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  • Morris, JP;
  • Rahimi, AM;
  • Regensburger, JJ;
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  • Kolb, JA;
  • Lu, M;
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  • Strube, J;
  • Torrence, E;
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  • Morandin, M;
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  • Posocco, M;
  • Rotondo, M;
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  • Stroili, R;
  • Voci, C;
  • Ben-Haim, E;
  • Briand, H;
  • Calderini, G;
  • Chauveau, J;
  • David, P;
  • Del Buono, L;
  • de la Vaissière, Ch;
  • Hamon, O;
  • Leruste, Ph;
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  • Gladney, L;
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  • Carpinelli, M;
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  • Lusiani, A;
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  • BABAR Collaboration
  • et al.
Abstract

We present partial branching fractions for inclusive charmless semileptonic B decays B[over ]-->X_{u}lnu[over ], and the determination of the Cabibbo-Kobayashi-Maskawa matrix element |V_{ub}|. The analysis is based on a sample of 383 x 10;{6} Upsilon(4S) decays into BB[over ] pairs collected with the BABAR detector at the SLAC PEP-II e;{+}e;{-} storage rings. We select events using the invariant mass M_{X} of the hadronic system, the invariant mass squared, q;{2}, of the lepton and neutrino pair, the kinematic variable P+, or one of their combinations. We then determine partial branching fractions in limited regions of phase space: DeltaB=(1.18+/-0.09_{stat}+/-0.07_{syst}+/-0.01_{theor})x10;{-3} (M_{X}<1.55 GeV/c;{2}), DeltaB=(0.95+/-0.10_{stat}+/-0.08_{syst}+/-0.01_{theor})x10;{-3} (P+<0.66 GeV/c), and DeltaB=(0.81+/-0.08_{stat}+/-0.07_{syst}+/-0.02_{theor})x10;{-3} (M_{X}<1.7 GeV/c;{2}, q;{2}>8 GeV;{2}/c;{4}). Corresponding values of |V_{ub}| are extracted using several theoretical calculations.

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