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Observation of the decay B-->J/psietaK and search for X(3872)-->J/psieta.

  • Author(s): Aubert, B;
  • Barate, R;
  • Boutigny, D;
  • Couderc, F;
  • Gaillard, JM;
  • Hicheur, A;
  • Karyotakis, Y;
  • Lees, JP;
  • 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;
  • Day, CT;
  • Gill, MS;
  • Gritsan, AV;
  • Groysman, Y;
  • Jacobsen, RG;
  • Kadel, RW;
  • Kadyk, J;
  • Kerth, LT;
  • Kolomensky, Yu G;
  • Kukartsev, G;
  • LeClerc, C;
  • Levi, ME;
  • Lynch, G;
  • Mir, LM;
  • Oddone, PJ;
  • Orimoto, TJ;
  • Pripstein, M;
  • Roe, NA;
  • Ronan, MT;
  • Shelkov, VG;
  • Telnov, AV;
  • Wenzel, WA;
  • Ford, K;
  • Harrison, TJ;
  • Hawkes, CM;
  • Morgan, SE;
  • Watson, AT;
  • Watson, NK;
  • Fritsch, M;
  • Goetzen, K;
  • Held, T;
  • Koch, H;
  • Lewandowski, B;
  • Pelizaeus, M;
  • Steinke, M;
  • Boyd, JT;
  • Chevalier, N;
  • Cottingham, WN;
  • Kelly, MP;
  • Latham, TE;
  • Wilson, FF;
  • Abe, K;
  • Cuhadar-Donszelmann, T;
  • Hearty, C;
  • Mattison, TS;
  • McKenna, JA;
  • Thiessen, D;
  • Kyberd, P;
  • Teodorescu, L;
  • Blinov, VE;
  • Bukin, AD;
  • Druzhinin, VP;
  • Golubev, VB;
  • Ivanchenko, VN;
  • Kravchenko, EA;
  • Onuchin, AP;
  • Serednyakov, SI;
  • Skovpen, Yu I;
  • Solodov, EP;
  • Yushkov, AN;
  • Best, D;
  • Bruinsma, M;
  • Chao, M;
  • Eschrich, I;
  • Kirkby, D;
  • Lankford, AJ;
  • Mandelkern, M;
  • Mommsen, RK;
  • Roethel, W;
  • Stoker, DP;
  • Buchanan, C;
  • Hartfiel, BL;
  • Gary, JW;
  • Shen, BC;
  • Wang, K;
  • del Re, D;
  • Hadavand, HK;
  • Hill, EJ;
  • MacFarlane, DB;
  • Paar, HP;
  • Rahatlou, Sh;
  • Sharma, V;
  • Berryhill, JW;
  • Campagnari, C;
  • Dahmes, B;
  • Levy, SL;
  • Long, O;
  • Lu, A;
  • Mazur, MA;
  • Richman, JD;
  • Verkerke, W;
  • Beck, TW;
  • Eisner, AM;
  • Heusch, CA;
  • Lockman, WS;
  • Schalk, T;
  • Schmitz, RE;
  • Schumm, BA;
  • Seiden, A;
  • Spradlin, P;
  • Williams, DC;
  • Wilson, MG;
  • Albert, J;
  • Chen, E;
  • Dubois-Felsmann, GP;
  • Dvoretskii, A;
  • Hitlin, DG;
  • Narsky, I;
  • Piatenko, T;
  • Porter, FC;
  • Ryd, A;
  • Samuel, A;
  • Yang, S;
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  • Meadows, BT;
  • Sokoloff, MD;
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  • Blanc, F;
  • Bloom, P;
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  • Olivas, A;
  • Rankin, P;
  • Smith, JG;
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  • Zhang, L;
  • Harton, JL;
  • Hu, T;
  • Soffer, A;
  • Toki, WH;
  • Wilson, RJ;
  • Zeng, Q;
  • Altenburg, D;
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  • Brose, J;
  • Colberg, T;
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  • Lacker, HM;
  • Maly, E;
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  • Thiebaux, Ch;
  • Vasileiadis, G;
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  • Bard, DJ;
  • Khan, A;
  • Lavin, D;
  • Muheim, F;
  • Playfer, S;
  • Andreotti, M;
  • Azzolini, V;
  • Bettoni, D;
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  • Cibinetto, G;
  • Luppi, E;
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  • Sarti, A;
  • Treadwell, E;
  • Baldini-Ferroli, R;
  • Calcaterra, A;
  • de Sangro, R;
  • Finocchiaro, G;
  • Patteri, P;
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  • Zallo, A;
  • Buzzo, A;
  • Capra, R;
  • Contri, R;
  • Crosetti, G;
  • Lo Vetere, M;
  • Macri, M;
  • Monge, MR;
  • Passaggio, S;
  • Patrignani, C;
  • Robutti, E;
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  • Lamsa, J;
  • Meyer, WT;
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  • Laplace, S;
  • Le Diberder, F;
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  • Lutz, AM;
  • Petersen, TC;
  • Plaszczynski, S;
  • Schune, MH;
  • Tantot, L;
  • Wormser, G;
  • Cheng, CH;
  • Lange, DJ;
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  • Wright, DM;
  • Bevan, AJ;
  • Coleman, JP;
  • Fry, JR;
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  • Gamet, R;
  • Kay, M;
  • Parry, RJ;
  • Payne, DJ;
  • Sloane, RJ;
  • Touramanis, C;
  • Back, JJ;
  • Harrison, PF;
  • Mohanty, GB;
  • Brown, CL;
  • Cowan, G;
  • Flack, RL;
  • Flaecher, HU;
  • George, S;
  • Green, MG;
  • Kurup, A;
  • Marker, CE;
  • McMahon, TR;
  • Ricciardi, S;
  • Salvatore, F;
  • Vaitsas, G;
  • Winter, MA;
  • Brown, D;
  • Davis, CL;
  • Allison, J;
  • Barlow, NR;
  • Barlow, RJ;
  • Hart, PA;
  • Hodgkinson, MC;
  • Lafferty, GD;
  • Lyon, AJ;
  • Williams, JC;
  • Farbin, A;
  • Hulsbergen, WD;
  • Jawahery, A;
  • Kovalskyi, D;
  • Lae, CK;
  • Lillard, V;
  • Roberts, DA;
  • Blaylock, G;
  • Dallapiccola, C;
  • Flood, KT;
  • Hertzbach, SS;
  • Kofler, R;
  • Koptchev, VB;
  • Moore, TB;
  • Saremi, S;
  • Staengle, H;
  • Willocq, S;
  • Cowan, R;
  • Sciolla, G;
  • Taylor, F;
  • Yamamoto, RK;
  • Mangeol, DJJ;
  • Patel, PM;
  • Robertson, SH;
  • Lazzaro, A;
  • Palombo, F;
  • Bauer, JM;
  • Cremaldi, L;
  • Eschenburg, V;
  • Godang, R;
  • Kroeger, R;
  • Reidy, J;
  • Sanders, DA;
  • Summers, DJ;
  • Zhao, HW;
  • Brunet, S;
  • Côté, D;
  • Taras, P;
  • Nicholson, H;
  • Cartaro, C;
  • Cavallo, N;
  • Fabozzi, F;
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  • Lista, L;
  • Monorchio, D;
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  • Gabriel, TA;
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  • Honscheid, K;
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  • Pulliam, T;
  • Ter-Antonyan, R;
  • Wong, QK;
  • Brau, J;
  • Frey, R;
  • Igonkina, O;
  • Potter, CT;
  • Sinev, NB;
  • Strom, D;
  • Torrence, E;
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  • Rotondo, M;
  • Simonetto, F;
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Abstract

We report the observation of the B meson decay B+/- -->J/psietaK+/- and evidence for the decay B0-->J/psietaK0S, using 90 x 10(6) BB; events collected at the Upsilon(4S) resonance with the BABAR detector at the SLAC PEP-II e+e- asymmetric-energy storage ring. We obtain branching fractions of B(B+/- -->J/psietaK+/-) = [10.8 +/- 2.3(stat) +/- 2.4(syst)] x 10(-5) and B(B0-->J/psietaK0S) = [8.4 +/- 2.6(stat) +/- 2.7(syst)] x 10(-5). We search for the new narrow mass state, the X(3872), recently reported by the Belle Collaboration, in the decay B+/- -->X(3872)K+/-,X(3872)-->J/psieta and determine an upper limit of B[B +/- -->X(3872)K+/- -->J/psietaK+/-] < 7.7 x 10(-6) at 90% confidence level.

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