Mass and width of the Roper resonance using complex-mass renormalization
D. Djukanovic, J. Gegelia, S. Scherer
TL;DR
This paper calculates the pole mass and width of the Roper resonance across different pion masses using a systematic complex-mass renormalization approach within low-energy effective field theory.
Contribution
It introduces a novel application of complex-mass renormalization to study the Roper resonance in effective field theory.
Findings
Pole mass and width depend on pion mass
Systematic power-counting scheme established
Effective field theory approach validated
Abstract
The pole mass and the width of the Roper resonance are calculated as functions of the pion mass in the framework of low-energy effective field theory of the strong interactions. We implement a systematic power-counting procedure by applying the complex-mass renormalization scheme.
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