Search for the decay B^- → Λ_c⁺ p ℓ^- ν_ℓ with the BABAR detector

2015/05/18 by Torsten Leddig, Leddig, Torsten
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #hep-ex

paper · pdf · doi:10.48550/arxiv.1505.04733

PhD thesis; defense at University of Rostock (Germany): 19.12.2014

arxiv created 2015/05/18 · arxiv updated 2015/05/19

Abstract

This work presents the search for the semileptonic baryonic B decay B^- → Λ_c⁺ p ℓ^- ν_ℓ. The used data comprises the complete BABAR data set of 470 ⋅ 10⁶ BB events, collected at the SLAC National Accelerator Laboratory. Using a pole-model decay simulation, we obtain upper limits with 90% confidence level of B(B^- → Λ_c⁺ p e^- ν_e)⋅ (B(Λ_c⁺ → p K^- π⁺))/(5%) < 1.2 × 10^-4, B(B^- → Λ_c⁺ p μ^- ν_μ)⋅ (B(Λ_c⁺ → p K^- π⁺))/(5%) < 2.5 × 10^-4, B(B^- → Λ_c⁺ p ℓ^- ν_ℓ)⋅ (B(Λ_c⁺ → p K^- π⁺))/(5%) < 1.0 × 10^-4. These results are in slight tension with predictions based on the measurement of B^- → p p ℓ^- ν_ℓ and B^- → Λ_c⁺ p π^-.

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