Structural analysis of the states within the “bump” regions in the spectrum via a control neural network
Phys. Rev. C 112, 034314 – Published 12 September, 2025
DOI: https://doi.org/10.1103/xdvj-hplt
Abstract
Recent high-precision () experiments have observed two prominent bump structures in the spectrum, challenging our understanding of hypernuclear structure and hyperon-nucleon () interactions. Motivated by this, we perform a systematic study of using a microscopic cluster model with a state-of-the-art interaction, guided via a control neural network (Ctrl.NN). Our calculations reveal several theoretically significant states within the energy domains of the experimental bumps. In the bump region (), we find states corresponding to a -wave hyperon coupled to the ground state. Their density distributions show the -wave orbit oriented parallel to the two- cluster axis, indicating a genuine hypernuclear excitation. In the bump region, a peculiar state is identified, featuring an -wave coupled to a contracted core (in its state). The density analysis confirms a distinct -orbit structure for the core. This work provides a detailed structural investigation of candidate states for the observed bumps and underscores the need for higher-resolution experiments to resolve these states and further refine our knowledge of interactions.