We report the observation of the baryonic decay B¯0→Λ+cp¯K−K+ using a data sample of 471×106 BB¯ pairs produced in e+e− annihilations at s√=10.58  GeV. This data sample was recorded with the BABAR detector at the PEP-II storage ring at SLAC. We find ℬ(B¯0→Λ+cp¯K−K+)=(2.5±0.4(stat)±0.2(syst)±0.6ℬ(Λ+c))×10−5, where the uncertainties are statistical, systematic, and due to the uncertainty of the Λ+c→pK−π+ branching fraction, respectively. The result has a significance corresponding to 5.0 standard deviations, including all uncertainties. For the resonant decay B¯0→Λ+cp¯ϕ, we determine the upper limit ℬ(B¯0→Λ+cp¯ϕ)<1.2×10−5 at 90% confidence level.

Lees, J.P., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., et al. (2015). Observation of the baryonic decay (B)over-bar(0) -> Lambda(+)(c)(p)over-barK(-)K(+). PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 91(3), 1-7 [10.1103/PhysRevD.91.031102].

Observation of the baryonic decay (B)over-bar(0) -> Lambda(+)(c)(p)over-barK(-)K(+)

PATRIGNANI, CLAUDIA;
2015

Abstract

We report the observation of the baryonic decay B¯0→Λ+cp¯K−K+ using a data sample of 471×106 BB¯ pairs produced in e+e− annihilations at s√=10.58  GeV. This data sample was recorded with the BABAR detector at the PEP-II storage ring at SLAC. We find ℬ(B¯0→Λ+cp¯K−K+)=(2.5±0.4(stat)±0.2(syst)±0.6ℬ(Λ+c))×10−5, where the uncertainties are statistical, systematic, and due to the uncertainty of the Λ+c→pK−π+ branching fraction, respectively. The result has a significance corresponding to 5.0 standard deviations, including all uncertainties. For the resonant decay B¯0→Λ+cp¯ϕ, we determine the upper limit ℬ(B¯0→Λ+cp¯ϕ)<1.2×10−5 at 90% confidence level.
2015
Lees, J.P., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., et al. (2015). Observation of the baryonic decay (B)over-bar(0) -> Lambda(+)(c)(p)over-barK(-)K(+). PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 91(3), 1-7 [10.1103/PhysRevD.91.031102].
Lees, J. P.; Poireau, V.; Tisserand, V.; Grauges, E.; Palano, A.; Eigen, G.; Stugu, B.; Brown, D. N.; Kerth, L. T.; Kolomensky, Yu. G.; Lee, M. J.; Ly...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/534681
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