Partial wave analysis of $\psi (3686)\to \Lambda {\bar{\Sigma }}^0{\pi }^0+c.c.$

Abstract

Based on a sample of $(2712.4\pm 14.3)\times 10^6\psi (3686)$ events collected with the BESIII detector, a partial wave analysis of the decay $\psi (3686)\to \Lambda {\bar{\Sigma }}^0{\pi }^0+c.c.$ is performed to investigate ${\Lambda }^{\ast }$ and ${\Sigma }^{\ast }$ resonances in the ${\pi }^0{\bar{\Sigma }}^0$ and ${\pi }^0\Lambda$ invariant mass distributions. Significant contributions are found from the $\Lambda (1405)$, $\Lambda (1520)$, $\Lambda (1600)$, $\Lambda (1670)$, $\Lambda (1690)$, $\Lambda (1800)$, $\Lambda (1890)$, $\Lambda (2325)$, $\Sigma (1385)$, $\Sigma (1660)$, $\Sigma (1670)$, $\Sigma (1750)$, and $\Sigma (1910)$. The masses, widths, and production branching fractions for each component are determined. In addition, the branching fraction of $\psi (3686)\to \Lambda {\bar{\Sigma }}^0{\pi }^0+c.c.$ is measured to be $(1.544\pm 0.013\pm 0.069)\times 10^{-4}$ for the first time, where the first uncertainty is statistical and the second systematic.

arXiv comment24 pages, 8 tables, 6 figures, consistent with the publication in JHEP02(2025)212

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Cited by in corpus (2)

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