Roper Resonance \(N^\ast (1440)\) from Charmonium Decays
Year: 2026
Type: article
Abstract: The Roper resonance \(N^\ast (1440)\) was discovered by David Roper in 1964 through sophisticated partial-wave analyses of \(\pi N\) scattering data. However, the first direct observation of the Roper resonance peak in the \(\pi N\) invariant mass spectrum was only realized 40 years later from the charmonium decay \(J/\psi \to \bar pn\pi ^+ +\mathrm {c.c.}\) at the Beijing Electron–Positron Collider. Further observations of the Roper resonance production from various charmonium decays helped reveal its multiquark nature, with a large \(\sigma N\) component. Abstract Published by the Jagiellonian University 2026 authors
Source: Acta Physica Polonica B
Author: B.-S. Zou
Institution: Tsinghua University
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W7128475247