We report the observation of the baryonic B decay B⎯⎯⎯0→Λ+cΛ⎯⎯⎯K− with a significance larger than 7 standard deviations based on 471×106 BB⎯⎯⎯ pairs collected with the BABAR detector at the PEP-II storage ring at SLAC. We measure the branching fraction for the decay B⎯⎯⎯0→Λ+cΛ⎯⎯⎯K− to be (3.8±0.8stat±0.2sys±1.0Λ+c)×10−5. The uncertainties are statistical, systematic, and due to the uncertainty in the Λ+c branching fraction. We find that the Λ+cK− invariant-mass distribution shows an enhancement above 3.5  GeV/c2.

Lees, J.P., Poireau, V., Tisserand, V., Tico, J.G., Grauges, E., Martinelli, M., et al. (2011). Observation of the baryonic B decay (B)over-bar(0) -> Lambda(+)(c)(Lambda)over-barK(-). PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 84(7), 1-7 [10.1103/PhysRevD.84.071102].

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

PATRIGNANI, CLAUDIA;
2011

Abstract

We report the observation of the baryonic B decay B⎯⎯⎯0→Λ+cΛ⎯⎯⎯K− with a significance larger than 7 standard deviations based on 471×106 BB⎯⎯⎯ pairs collected with the BABAR detector at the PEP-II storage ring at SLAC. We measure the branching fraction for the decay B⎯⎯⎯0→Λ+cΛ⎯⎯⎯K− to be (3.8±0.8stat±0.2sys±1.0Λ+c)×10−5. The uncertainties are statistical, systematic, and due to the uncertainty in the Λ+c branching fraction. We find that the Λ+cK− invariant-mass distribution shows an enhancement above 3.5  GeV/c2.
2011
Lees, J.P., Poireau, V., Tisserand, V., Tico, J.G., Grauges, E., Martinelli, M., et al. (2011). Observation of the baryonic B decay (B)over-bar(0) -> Lambda(+)(c)(Lambda)over-barK(-). PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 84(7), 1-7 [10.1103/PhysRevD.84.071102].
Lees, J. P.; Poireau, V.; Tisserand, V.; Tico, J. Garra; Grauges, E.; Martinelli, M.; Milanes, D. A.; Palano, A.; Pappagallo, M.; Eigen, G.; Stugu, B....espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/543528
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