The Role of the Roper in Chiral Perturbation Theory

Details The Role of the Roper in Chiral Perturbation Theory The Role of the Roper in Chiral Perturbation Theory

2011-05-13

arxiv.org/abs/1105.2764v2

Nucl. Phys. A 870-871 (2011) 72

Physics

Nuclear Physics

Nuclear Theory

Version to be published

Scientific paper

10.1016/j.nuclphysa.2011.09.002

We include the Roper excitation of the nucleon in a version of heavy-baryon
chiral perturbation theory recently developed for energies around the delta
resonance. We find significant improvement in the $P_{11}$ channel.

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