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This research examines the unique characteristics of the Roper resonance in protons and neutrons.

February 12, 2026Open Access

Anatomy of Roper Resonance

Key Points

This research examines the unique characteristics of the Roper resonance in protons and neutrons.
Provided a historical overview of the Roper resonance development.
Discussed the significance of two-pole positions on different Riemann sheets.
Identified the Roper state as a unique case in nuclear physics.
Illustrated the evolution of understanding of the resonance over sixty years.

Abstract

Sixty years ago, the first excited state of a proton/neutron was “born”. During this time, we learned a lot about it, specifically, how unique this case is: a single resonance with two-pole positions on different Riemann sheets. Let me provide a brief history to remind the readers how development progressed. Sure, history is sometimes what never happened, described by those who were never there … Abstract Published by the Jagiellonian University 2026 authors

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Cite This Study

Igor Strakovsky (Tue,) studied this question.

synapsesocial.com/papers/698d6e6e5be6419ac0d5419a https://doi.org/https://doi.org/10.5506/aphyspolb.57.2-a3

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