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Observation of the baryonic decay  ¯ 𝐵 0 →Λ+ 𝑐⁢ ¯ 𝑝 ⁢𝐾−⁢𝐾+
Journal article   Open access   Peer reviewed

Observation of the baryonic decay ¯ 𝐵 0 →Λ+ 𝑐⁢ ¯ 𝑝 ⁢𝐾−⁢𝐾+

J.P Lees, V Poireau, V Tisserand, N Arnaud, M Davier, D Derkach, G Grosdidier, F. Le Diberder, A. M Lutz, B Malaescu, …
Physical review. D, Particles, fields, gravitation, and cosmology, Vol.91, 031102
2015
DOI: 10.1103/PhysRevD.91.031102
url
https://doi.org/10.1103/PhysRevD.91.031102View
Published (Version of record) Open Access

Abstract

We report the observation of the baryonic decay B¯0→Λc+p¯K-K+ using a data sample of 471×106 BB¯ pairs produced in e+e- annihilations at s=10.58GeV. This data sample was recorded with the BABAR detector at the PEP-II storage ring at SLAC. We find B(B¯0→Λc+p¯K-K+)=(2.5±0.4(stat)±0.2(syst)±0.6B(Λc+))×10-5, where the uncertainties are statistical, systematic, and due to the uncertainty of the Λc+→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→Λc+p¯φ, we determine the upper limit B(B¯0→Λc+p¯φ)<1.2×10-5 at 90% confidence level.
Physics High Energy Physics - Experiment

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