Search for the Cabibbo-suppressed decays Λ_c⁺→Σ⁰K⁺π⁰ and Λ_c⁺→Σ⁰K⁺π⁺π^-

2025/02/16 by M. Ablikim, BESIII Collaboration, Ablikim, M. +773
Engineering · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Particle Accelerators and Free-Electron Lasers #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.2502.11047

openalex publication_date 2025/02/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/29

Abstract

Utilizing 4.5 fb^- of e⁺e^- annihilation data collected at center-of-mass energies ranging from 4599.53 MeV to 4698.82 MeV by the BESIII detector at the BEPCII collider, we search for the singly Cabibbo-suppressed hadronic decays Λ_c⁺→Σ⁰ K⁺π⁰ and Λ_c⁺→Σ⁰K⁺π⁺π^- with a single-tag method. No significant signals are observed for both decays. The upper limits on the branching fractions at the 90% confidence level are determined to be 5.0× 10^-4 for Λ_c⁺→Σ⁰ K⁺π⁰ and 6.5× 10^-4 for Λ_c⁺→Σ⁰K⁺π⁺π^-.

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