Partial wave analysis of ψ (3686)→ Λ Σ̄⁰π⁰ + c.c.

A bstract Based on a sample of (2712 . 4 ± 14 . 3) × 10 6 ψ (3686) events collected with the BESIII detector, a partial wave analysis of the decay ψ (3686)→ Λ Σ̄⁰π⁰ ψ 3686 → Λ Σ ¯ 0 π 0 + c . c . is performed to investigate Λ * and Σ * resonances in the π⁰Σ̄⁰ π 0 Σ ¯ 0 and π 0 Λ invariant mass distributions. Significant contributions are found from the Λ(1405), Λ(1520), Λ(1600), Λ(1670), Λ(1690), Λ(1800), Λ(1890), Λ(2325), Σ(1385), Σ(1660), Σ(1670), Σ(1750), and Σ(1910). The masses, widths, and production branching fractions for each component are determined. In addition, the branching fraction of ψ (3686)→ Λ Σ̄⁰π⁰ ψ 3686 → Λ Σ ¯ 0 π 0 + c . c . is measured to be (1 . 544 ± 0 . 013 ± 0 . 071) × 10 − 4 for the first time, where the first uncertainty is statistical and the second systematic.