Study of the decay B̅[superscript 0]→Λ[+ over c]p̅π[superscript +]π[superscript -] and its intermediate states
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Author(s)
Sciolla, Gabriella
Cowan, Ray F
Dujmic, Denis
Date Issued
May 2013
Journal
Physical Review D
Publisher
American Physical Society
Citation
Lees, J. P., V. Poireau, V. Tisserand, E. Grauges, A. Palano, G. Eigen, B. Stugu, et al. “Study of the decay B̅[superscript 0]→Λ[+ over c]p̅π[superscript +]π[superscript -] and its intermediate states.” Physical Review D 87, no. 9 (May 2013). http://dx.doi.org/10.1103/PhysRevD.87.092004.
Version
Final published version
Abstract
We study the decay B̅[superscript 0]→Λ[+ over c]p̅π[superscript +]π[superscript -], reconstructing the Λ[+ over c] baryon in the pK[superscript -]π[superscript +] mode, using a data sample of 467×10[superscript 6] BB̅ pairs collected with the BABAR detector at the PEP-II storage rings at SLAC. We measure branching fractions for decays with intermediate Σ[subscript c] baryons to be B[B̅[superscript 0]→Σ[subscript c](2455)[superscript ++]p̅π[superscript -]]=(21.3±1.0±1.0±5.5)×10[superscript -5], B[B̅[superscript 0]→Σ[subscript c](2520)[superscript ++]p̅ π[superscript -]]=(11.5±1.0±0.5±3.0)×10[superscript -5], B[B̅[superscript 0]→Σ[subscript c](2455)[superscript 0]p̅ π[superscript +]]=(9.1±0.7±0.4±2.4)×10[superscript -5], and B[B̅[superscript 0]→Σ[subscript c](2520)[superscript 0]p̅π[superscript +]]=(2.2±0.7±0.1±0.6)×10[superscript -5], where the uncertainties are statistical, systematic, and due to the uncertainty on the Λ[+ over c]→pK[superscript -]π[superscript +] branching fraction, respectively. For decays without Σ[subscript c](2455) or Σ[subscript c](2520) resonances, we measure B[B̅[superscript 0]→Λ[+ over c]p̅π[superscript +]π[superscript -]][subscript non-Σc]= (79±4±4±20)×10[superscript -5]. The total branching fraction is determined to be B[B̅[superscript 0]→Λ[+ over c]p̅π[superscript +]π[superscript -]][subscript total]=(123±5±7±32)×10[superscript -5]. We examine multibody mass combinations in the resonant three-particle Σ[subscript c]p̅ π final states and in the four-particle Λ[+ over c]p̅π[superscript +]π[superscript -] final state, and observe different characteristics for the p̅ π combination in neutral versus doubly charged Σ[subscript c] decays.
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.87.092004
