Revisiting the ${\Lambda }_c^{+}\to \Lambda \eta {\pi }^{+}$ and the roles of intermediate resonances

Abstract

In this paper, we first review the theoretical and experimental studies of the process ${\Lambda }_c^{+}\to {\pi }^{+}\eta \Lambda$. Motivated by the recent BESIII and Belle measurements, we have conducted a theoretical study of the process ${\Lambda }_c^{+}\to {\pi }^{+}\eta \Lambda$, where the $a_0(980)$ and $\Lambda (1670)$ resonances are dynamically generated from the $S$-wave meson meson and meson baryon interaction, respectively. Our results give a reasonable description of the invariant mass distributions, which implies that the spin flip contribution in the $\Sigma (1385)$ excitation plays an important role.

Comments: 6 pages, 2 figures, Contribution to The 21st International Conference on Hadron Spectroscopy and Structure (HADRON2025), 27-31 March 2025, Osaka University, Japan