Infrared regularization with spin-3/2 fields
arXiv:hep-ph/0303198 · doi:10.1016/S0370-2693(03)00538-0
Abstract
We present a Lorentz-invariant formulation of baryon chiral perturbation theory including spin-3/2 fields. Particular attention is paid to the projection on the spin-3/2 components of the delta fields. We also discuss the nucleon mass and the pion-nucleon sigma term.
9 pp, 1 fig