We study the decay B⎯⎯⎯0→Λ+cp⎯⎯π+π−, reconstructing the Λ+c baryon in the pK−π+ mode, using a data sample of 467×106 BB⎯⎯⎯ 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[B⎯⎯⎯0→Σc(2455)++p⎯⎯π−]=(21.3±1.0±1.0±5.5)×10−5, ℬ[B⎯⎯⎯0→Σc(2520)++p⎯⎯π−]=(11.5±1.0±0.5±3.0)×10−5, ℬ[B⎯⎯⎯0→Σc(2455)0p⎯⎯π+]=(9.1±0.7±0.4±2.4)×10−5, and ℬ[B⎯⎯⎯0→Σc(2520)0p⎯⎯π+]=(2.2±0.7±0.1±0.6)×10−5, where the uncertainties are statistical, systematic, and due to the uncertainty on the Λ+c→pK−π+ branching fraction, respectively. For decays without Σc(2455) or Σc(2520) resonances, we measure ℬ[B⎯⎯⎯0→Λ+cp⎯⎯π+π−]non−Σc=(79±4±4±20)×10−5. The total branching fraction is determined to be ℬ[B⎯⎯⎯0→Λ+cp⎯⎯π+π−]total=(123±5±7±32)×10−5. We examine multibody mass combinations in the resonant three-particle Σcp⎯⎯π final states and in the four-particle Λ+cp⎯⎯π+π− final state, and observe different characteristics for the p⎯⎯π combination in neutral versus doubly charged Σc decays.

Lees, J.P., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., et al. (2013). Study of the decay (B)over-bar(0) -> Lambda(+)(c) (p)over-bar pi(+) pi(-) and its intermediate states. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 87(9), 1-17 [10.1103/PhysRevD.87.092004].

Study of the decay (B)over-bar(0) -> Lambda(+)(c) (p)over-bar pi(+) pi(-) and its intermediate states

PATRIGNANI, CLAUDIA;
2013

Abstract

We study the decay B⎯⎯⎯0→Λ+cp⎯⎯π+π−, reconstructing the Λ+c baryon in the pK−π+ mode, using a data sample of 467×106 BB⎯⎯⎯ 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[B⎯⎯⎯0→Σc(2455)++p⎯⎯π−]=(21.3±1.0±1.0±5.5)×10−5, ℬ[B⎯⎯⎯0→Σc(2520)++p⎯⎯π−]=(11.5±1.0±0.5±3.0)×10−5, ℬ[B⎯⎯⎯0→Σc(2455)0p⎯⎯π+]=(9.1±0.7±0.4±2.4)×10−5, and ℬ[B⎯⎯⎯0→Σc(2520)0p⎯⎯π+]=(2.2±0.7±0.1±0.6)×10−5, where the uncertainties are statistical, systematic, and due to the uncertainty on the Λ+c→pK−π+ branching fraction, respectively. For decays without Σc(2455) or Σc(2520) resonances, we measure ℬ[B⎯⎯⎯0→Λ+cp⎯⎯π+π−]non−Σc=(79±4±4±20)×10−5. The total branching fraction is determined to be ℬ[B⎯⎯⎯0→Λ+cp⎯⎯π+π−]total=(123±5±7±32)×10−5. We examine multibody mass combinations in the resonant three-particle Σcp⎯⎯π final states and in the four-particle Λ+cp⎯⎯π+π− final state, and observe different characteristics for the p⎯⎯π combination in neutral versus doubly charged Σc decays.
2013
Lees, J.P., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., et al. (2013). Study of the decay (B)over-bar(0) -> Lambda(+)(c) (p)over-bar pi(+) pi(-) and its intermediate states. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 87(9), 1-17 [10.1103/PhysRevD.87.092004].
Lees, J. P.; Poireau, V.; Tisserand, V.; Grauges, E.; Palano, A.; Eigen, G.; Stugu, B.; Brown, D. N.; Kerth, L. T.; Kolomensky, Yu. G.; Lynch, G.; Koc...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/537361
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