Mass and width of the Roper resonance using complex-mass renormalization

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.

8 pages, 2 fugures, REVTeX 4

References in corpus (5)

• Electromagnetic excitation of the Delta(1232)-resonance
• The complex-mass scheme for perturbative calculations with unstable particles
• Complex-mass renormalization in chiral effective field theory
• Chiral corrections to the Roper mass
• On the definition of the Δmass and width

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