Measurements of Λ⁺_c Branching Fractions of Cabibbo-Suppressed Decay Modes

2004/08/10 by B. Aubert, BABAR Collaboration, Aubert, B. +1
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #hep-ex

paper · pdf · doi:10.48550/arxiv.hep-ex/0408024

16pages, 5figures, contributed to ICHEP2004

arxiv created 2004/08/10 · arxiv updated 2009/12/01

Abstract

We have measured the branching fractions of the Cabibbo-suppressed decays Λ⁺_c → Λ⁰ K⁺ and Λ⁺_c → Σ⁰ K⁺ %(measured with improved accuracy). relative to the Cabibbo-allowed decay modes Λ⁺_c → Λ⁰ π⁺ and Λ⁺_c → Σ⁰ π⁺ to be 0.044 ± 0.004 (\textnormalstat.) ± 0.002 (\textnormalsyst.) and 0.040 ± 0.005 (\textnormalstat.) ± 0.004 (\textnormalsyst.), respectively. We also present the first observation of Λ⁺_c → Λ⁰ K⁺ π⁺ π^- and have measured the branching fraction relative to Λ⁺_c → Λ⁰ π⁺ to be 0.266 ± 0.027 (\textnormalstat.) ± 0.032 (\textnormalsyst.). The upper limit of the branching fraction into the decay Λ⁺_c → Σ⁰ K⁺ π⁺ π^- relative to Λ⁺_c → Σ⁰ π⁺ has been measured to be %7.6 × 10^-4 < 3.9 × 10^-2 at the 90% confidence level. This analysis was performed using a data sample of %approximately 125 fb^-1 (integrated luminosity) collected by the \babar detector at the PEP-II asymmetric-energy B Factory at the Stanford Linear Accelerator Center. All results presented in this conference contribution are preliminary.

Related

• Measurement of the branching fractions of the Cabibbo-favored decays Λ_c⁺→ΛK_S⁰K⁺ and Λ_c⁺→Ξ⁰K_S⁰π⁺ and search for Λ_c⁺→Σ⁰ K_S⁰K⁺
• Measurement of the branching fractions of the decays Λ_c⁺→ΛK_S⁰K⁺, Λ_c⁺→ΛK_S⁰π⁺ and Λ_c⁺→ΛK^*+
• First measurements of the branching fractions for the decay modes Ξ_c⁰ → Λη and Ξ_c⁰ → Λη' and search for the decay Ξ_c⁰ → Λπ⁰ using Belle and Belle II data
• Search for the Cabibbo-suppressed decays Λ_c⁺→Σ⁰K⁺π⁰ and Λ_c⁺→Σ⁰K⁺π⁺π^-
• Observation of Λ_c⁺ → Λ⁰ K⁺, Λ_c⁺ → Σ⁰ K⁺ and Λ_c⁺ → Σ⁺ K⁺π^- decays