We report the observation of the baryonic B decay B̄0→ Λc+Λ̄K- with a significance larger than 7 standard deviations based on 471×106 BB̄ pairs collected with the BABAR detector at the PEP-II storage ring at SLAC. We measure the branching fraction for the decay B̄0→Λc+Λ̄K- to be (3.8±0.8stat±0.2sys±1.0 Λc+)×10-5. The uncertainties are statistical, systematic, and due to the uncertainty in the Λc+ branching fraction. We find that the Λc+K- invariant-mass distribution shows an enhancement above 3.5GeV/c2.
Lees, J., Poireau, V., Tisserand, V., Tico, J., Grauges, E., Martinelli, M., et al. (2011). Observation of the baryonic B decay B ̄0→Λc+Λ̄K-. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 84(7) [10.1103/PhysRevD.84.071102].
Observation of the baryonic B decay B ̄0→Λc+Λ̄K-
CARPINELLI, MassimoMembro del Collaboration Group
;
2011
Abstract
We report the observation of the baryonic B decay B̄0→ Λc+Λ̄K- with a significance larger than 7 standard deviations based on 471×106 BB̄ pairs collected with the BABAR detector at the PEP-II storage ring at SLAC. We measure the branching fraction for the decay B̄0→Λc+Λ̄K- to be (3.8±0.8stat±0.2sys±1.0 Λc+)×10-5. The uncertainties are statistical, systematic, and due to the uncertainty in the Λc+ branching fraction. We find that the Λc+K- invariant-mass distribution shows an enhancement above 3.5GeV/c2.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
