Study of baryonic decays of B mesons at BABAR

2014/02/04 by Oliver Gruenberg, Gruenberg, Oliver
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #hep-ex

paper · pdf · doi:10.48550/arxiv.1402.0732

6 pages, 6 figures, Proceedings of Hadron2013

arxiv created 2014/02/26 · arxiv updated 2014/02/27

Abstract

We report on recent BABAR analyses of the baryonic B decays B⁰→Λ_{\rm c}⁺pπ⁺π^-, B^-→Σ_{\rm c}⁺⁺pπ^-π^-, B⁰→Λ_{\rm c}⁺ppp and B⁰→ D⁰ΛΛ. The used data sample contains 471×10⁶ BB pairs that were generated in the process e⁺e^-→Υ(4S)→ BB and collected with the BABAR detector at the PEP-II storage ring at SLAC. We find \cal B(B⁰→Λ_{\rm c}⁺pπ⁺π^-) = (12.3±0.5_{\rm stat}±0.7_{\rm syst}±3.2_\rmΛ_{\rm c})×10^-3, \cal B(B^-→Σ_{\rm c}⁺⁺pπ^-π^-) = (2.98±0.16_{\rm stat}±0.15_{\rm syst}±0.77_\rmΛ_{\rm c})×10^-3, where the last uncertainty is due to \cal B(Λ_{\rm c}⁺→ p K^-π⁺), respectively. For the decay B⁰→Λ_{\rm c}⁺ppp we see no events and set an upper limit \cal B(B⁰→Λ_{\rm c}⁺ppp)× \frac\cal B(Λ_{\rm c}⁺→ p K^-π⁺)0.050 < 2.8×10^-6 at 90 % CL, where we have normalized \cal B(Λ_{\rm c}⁺→ p K^-π⁺) to the world average value. There is evidence for the decay B⁰→ D⁰ΛΛ and we measure \cal B(B⁰→ D⁰ΛΛ) = (9.8^+2.9_{-2.6 \rm stat}±1.9_{\rm syst})×10^-6 corresponding to a significance of 3.4σ.

Related

• Measurement of the Branching Fractions of the Decays B⁰ → Λ_c⁺ p and B^- → Λ_c⁺ p π^-
• Moriond 2012, QCD and High Energy Interactions: Baryonic B decays at BaBar
• Hadronic B Decays to Charm and Charmonium With the BaBar Experiment
• Search for the decay B^- → Λ_c⁺ p ℓ^- ν_ℓ with the BABAR detector
• Measurements of B⁰ decays to pi⁺pi^-pi⁰