Including the $Δ(1232)$ resonance in baryon chiral perturbation theory

Details Including the $Δ(1232)$ resonance in baryon chiral perturbation theory Including the $Δ(1232)$ resonance in baryon chiral perturbation theory

2005-05-06

arxiv.org/abs/hep-ph/0505043v1

Phys.Rev. C72 (2005) 055203

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, 2 figures, REVTeX 4

Scientific paper

10.1103/PhysRevC.72.055203

Baryon chiral perturbation theory with explicit $\Delta(1232)$ degrees of
freedom is considered. Using the extended on-mass-shell renormalization scheme,
a manifestly Lorentz-invariant effective field theory with a systematic power
counting is obtained. As applications we discuss the mass of the nucleon, the
pion-nucleon sigma term, and the pole of the $\Delta$ propagator.

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