Recent Progress in Effective Field Theory in the One-Nucleon Sector

Abstract

Chiral perturbation theory (ChPT) is the effective field theory of the strong interactions at low energies. We will address the issue of a consistent power counting scheme in a manifestly Lorentz-invariant formulation of baryon ChPT. As applications we show how the inclusion of vector and axial-vector mesons in the calculation of the nucleon electromagnetic and axial form factors, respectively, lead to an improved description of the empirical data. Finally, we will outline a systematic implementation of the Delta(1232) resonance into the effective field theory program.

arXiv comment6 pages, 2 figures, invited parallel session lead talk given at the 20th European Conference on Few-Body Problems in Physics (EFB20), Pisa, Italy, 10-14 September 2007

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