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Observation of the decay B¯0→Λc+p¯π0
- Aubert, B;
- Karyotakis, Y;
- Lees, JP;
- Poireau, V;
- Prencipe, E;
- Prudent, X;
- Tisserand, V;
- Tico, J Garra;
- Grauges, E;
- Martinelli, M;
- Palano, A;
- Pappagallo, M;
- Eigen, G;
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- Brown, DN;
- Hooberman, B;
- Kerth, LT;
- Kolomensky, Yu G;
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- Tackmann, K;
- Tanabe, T;
- Hawkes, CM;
- Soni, N;
- Watson, AT;
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- Asgeirsson, DJ;
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- Mattison, TS;
- McKenna, JA;
- Barrett, M;
- Khan, A;
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- Blinov, VE;
- Bukin, AD;
- Buzykaev, AR;
- Druzhinin, VP;
- Golubev, VB;
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- Skovpen, Yu I;
- Solodov, EP;
- Todyshev, K Yu;
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- Lund, P;
- Mandelkern, M;
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- Vitug, GM;
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- Hong, TM;
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- Mazur, MA;
- Richman, JD;
- Beck, TW;
- Eisner, AM;
- Heusch, CA;
- Kroseberg, J;
- Lockman, WS;
- Martinez, AJ;
- Schalk, T;
- Schumm, BA;
- Seiden, A;
- Wang, L;
- Winstrom, LO;
- Cheng, CH;
- Doll, DA;
- Echenard, B;
- Fang, F;
- Hitlin, DG;
- Narsky, I;
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- Gaz, A;
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- Nagel, M;
- Nauenberg, U;
- Smith, JG;
- Wagner, SR;
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- Feltresi, E;
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- Charles, MJ;
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- Chavez, CA;
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- Gradl, W;
- Hafner, A;
- Alwyn, KE;
- Bailey, D;
- Barlow, RJ;
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- Anderson, J;
- Chen, C;
- Jawahery, A;
- Roberts, DA;
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- Tuggle, JM;
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- Morandin, M;
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- Rizzo, G;
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- Thompson, JM;
- Va’vra, J;
- Wagner, AP;
- Weaver, M;
- West, CA;
- Wisniewski, WJ;
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- Wright, DH;
- Wulsin, HW;
- Yarritu, AK;
- Young, CC;
- Ziegler, V;
- Chen, XR;
- Liu, H;
- Park, W;
- Purohit, MV;
- White, RM;
- Wilson, JR;
- Bellis, M;
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- Miyashita, TS;
- Ahmed, S;
- Alam, MS;
- Ernst, JA;
- Pan, B;
- Saeed, MA;
- Zain, SB;
- Soffer, A;
- Spanier, SM;
- Wogsland, BJ;
- Eckmann, R;
- Ritchie, JL;
- Ruland, AM;
- Schilling, CJ;
- Schwitters, RF;
- Wray, BC;
- Drummond, BW;
- Izen, JM;
- Lou, XC;
- Bianchi, F;
- Gamba, D;
- Pelliccioni, M;
- Bomben, M;
- Bosisio, L;
- Cartaro, C;
- Della Ricca, G;
- Lanceri, L;
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- Martinez-Vidal, F;
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- Albert, J;
- Banerjee, Sw;
- Bhuyan, B;
- Choi, HHF;
- Hamano, K;
- King, GJ;
- Kowalewski, R;
- Lewczuk, MJ;
- Nugent, IM;
- Roney, JM;
- Sobie, RJ;
- Gershon, TJ;
- Harrison, PF;
- Ilic, J;
- Latham, TE;
- Mohanty, GB;
- Puccio, EMT;
- Band, HR;
- Chen, X;
- Dasu, S;
- Flood, KT;
- Pan, Y;
- Prepost, R;
- Vuosalo, CO;
- Wu, SL
- et al.
Abstract
In a sample of 467×106 BB̄ pairs collected with the BABAR detector at the PEP-II collider at SLAC we have observed the decay B̄0→Λc+p̄π0 and measured the branching fraction to be (1.94±0.17±0.14±0.50)×10-4, where the uncertainties are statistical, systematic, and the uncertainty on the Λc+→pK-π+ branching fraction, respectively. We determine an upper limit of 1.5×10-6 at 90% C.L. for the product branching fraction B(B̄0→Σc+(2455)p̄) ×B(Λc+→pK-π+). Furthermore, we observe an enhancement at the threshold of the invariant mass of the baryon-antibaryon pair. © 2010 The American Physical Society.
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