Internal structure of near-threshold states using compositeness
High Energy Physics - Phenomenology
2025-12-24 v1 Nuclear Theory
Abstract
Understanding the internal structure of near-threshold states is essential for revealing the nature of exotic hadrons. Motivated by this challenge, we discuss the clustering structures of near-threshold -wave eigenstates using the compositeness, which characterizes the clustering nature of the states. We show that shallow bound states usually possess cluster-dominant structures, while near-threshold narrow resonances are non-cluster-dominant. Through this study, we establish a theoretical foundation for the threshold energy rule, which has been known empirically.
Cite
@article{arxiv.2512.20155,
title = {Internal structure of near-threshold states using compositeness},
author = {Tomona Kinugawa and Tetsuo Hyodo},
journal= {arXiv preprint arXiv:2512.20155},
year = {2025}
}
Comments
8 pages, 3 figures, Proceedings of Southeast Asian Workshop on Nuclear and Hadron Physics (SEA-NHP), August 19th - 21st, 2025