- Main
Study of the decay B̄0→Λc+p̄π +π- and its intermediate states
- Author(s): Lees, JP
- Poireau, V
- Tisserand, V
- Grauges, E
- Palano, A
- Eigen, G
- Stugu, B
- Brown, DN
- Kerth, LT
- Kolomensky, YG
- Lynch, G
- Koch, H
- Schroeder, T
- Asgeirsson, DJ
- Hearty, C
- Mattison, TS
- McKenna, JA
- So, RY
- Khan, A
- Blinov, VE
- Buzykaev, AR
- Druzhinin, VP
- Golubev, VB
- Kravchenko, EA
- Onuchin, AP
- Serednyakov, SI
- Skovpen, YI
- Solodov, EP
- Todyshev, KY
- Yushkov, AN
- Kirkby, D
- Lankford, AJ
- Mandelkern, M
- Atmacan, H
- Gary, JW
- Long, O
- Vitug, GM
- Campagnari, C
- Hong, TM
- Kovalskyi, D
- Richman, JD
- West, CA
- Eisner, AM
- Kroseberg, J
- Lockman, WS
- Martinez, AJ
- Schumm, BA
- Seiden, A
- Chao, DS
- Cheng, CH
- Echenard, B
- Flood, KT
- Hitlin, DG
- Ongmongkolkul, P
- Porter, FC
- Rakitin, AY
- Andreassen, R
- Huard, Z
- Meadows, BT
- Sokoloff, MD
- Sun, L
- Bloom, PC
- Ford, WT
- Gaz, A
- Nauenberg, U
- Smith, JG
- Wagner, SR
- Ayad, R
- Toki, WH
- Spaan, B
- Schubert, KR
- Schwierz, R
- Bernard, D
- Verderi, M
- Clark, PJ
- Playfer, S
- Bettoni, D
- Bozzi, C
- Calabrese, R
- Cibinetto, G
- Fioravanti, E
- Garzia, I
- Luppi, E
- Piemontese, L
- Santoro, V
- Baldini-Ferroli, R
- Calcaterra, A
- De Sangro, R
- Finocchiaro, G
- Patteri, P
- Peruzzi, IM
- Piccolo, M
- Rama, M
- Zallo, A
- Contri, R
- Guido, E
- Lo Vetere, M
- Monge, MR
- Passaggio, S
- Patrignani, C
- et al.
Abstract
We study the decay B̄0→Λc+p̄π +π-, reconstructing the Λc+ baryon in the pK-π+ mode, using a data sample of 467×106 BB̄ pairs collected with the BABAR detector at the PEP-II storage rings at SLAC. We measure branching fractions for decays with intermediate Σc baryons to be B[B̄0→Σ c(2455)++p̄π-]=(21. 3±1.0±1.0±5.5)×10-5, B[B ̄0→Σc(2520)++p̄ π-]=(11.5±1.0±0.5±3.0)×10-5, B[B̄0→Σc(2455)0p̄π+]=(9.1±0.7±0.4±2. 4)×10-5, and B[B̄0→Σ c(2520)0p̄π+]=(2.2±0.7±0. 1±0.6)×10-5, where the uncertainties are statistical, systematic, and due to the uncertainty on the Λc+→pK -π+ branching fraction, respectively. For decays without Σc(2455) or Σc(2520) resonances, we measure B[B̄0→Λc+p̄π+π -]non-Σc=(79±4±4±20) ×10-5. The total branching fraction is determined to be B[B̄0→Λc+p̄π+π-] total=(123±5±7±32)×10-5. We examine multibody mass combinations in the resonant three-particle Σcp̄π final states and in the four-particle Λc+p̄π+π- final state, and observe different characteristics for the p̄π combination in neutral versus doubly charged Σc decays. © 2013 American Physical Society.
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