The structure of hadrons
Structure of the nucleon in chiral perturbation theory
Institut für Kernphysik, Johannes Gutenberg-Universität, D-55099 Mainz, Germany
2 High Energy Physics Institute, Tbilisi State University, University St. 9, 380086 Tbilisi, Georgia
Published online: 12 February 2004
We discuss a renormalization scheme for relativistic baryon chiral perturbation theory which provides a simple and consistent power counting for renormalized diagrams. The method involves finite subtractions of dimensionally regularized diagrams beyond the standard modified minimal subtraction scheme of chiral perturbation theory to remove contributions violating the power counting. This is achieved by a suitable renormalization of the parameters of the most general effective Lagrangian. As applications we discuss the mass of the nucleon, the σ term, and the scalar and electromagnetic form factors.
PACS: codes. – 12.39.Fe - Chiral Lagrangians / codes. – 11.10.Gh - Renormalization / codes. – 13.40.Gp - Electromagnetic form factors
© Società Italiana di Fisica, Springer-Verlag, 2004